Pub. No.: WO/2008/066263 International Application No.: PCT/KR2007/005669
Publication Date: 05.06.2008 International Filing Date: 12.11.2007
IPC: H04B 1/40 (2006.01)
Applicant: SON, Ho Won [KR/KR]; 202-104 Kyung-Dong Apt.
Chungryong-Dong, Geunjung-gu, Busan 609-769 (KR).
Inventor: SON, Ho Won; 202-104 Kyung-Dong Apt. Chungryong-Dong,
Geunjung-gu, Busan 609-769 (KR).
Agent: BAEG, Seung Jun; 7F, Kyungnam Bldg., 56-4, Jungang-dong, 4-ga,
Jung-gu, Busan 600-815 (KR).
Priority Data:
10-2006-0118123 28.11.2006 KR
10-2007-0044667 08.05.2007 KR
Title: METHOD OF AND MODULE FOR DETECTING ELECTROMAGNETIC WAVES OF
ILLEGAL WIRELESS DEVICES, AND MOBILE DEVICE WITH ELECTROMAGNETIC WAVE
DETECTING FUNCTION USING THE SAME
Abstract:
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The present invention provides a radio wave detection method and a
radio wave detection module for detecting illegal radio devices, and
a mobile device having a radio wave detection function using the
method and the module, for effectively detecting a radio signal
transmitted from an illegal radio device, such as an eavesdropping
device, a monitoring device, and a hidden camera used to violate
privacy or leak information. In the present invention, a narrowband
radio signal including a radio signal of a frequency band used by the
illegal radio device is received through a single frequency antenna,
and a direct current voltage value for a specific frequency of the
illegal radio device is obtained by serially processing the received
narrowband radio signal. Then, the obtained direct current voltage
value is transmitted to a micro-controller through an
analog-to-digital converter port of the micro-controller, and a data
value of a digital form is outputted from the micro-controller to
externally display existence of the illegal radio device through a
display apparatus.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BH, BR,
BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE,
EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP,
KE, KG, KM, KN, KP, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME,
MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT,
RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT,
TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Org. (ARIPO) (BW, GH, GM, KE,
LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES,
FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, PL, PT, RO,
SE, SI, SK, TR)
African Intellectual Property Organization (OAPI) (BF, BJ, CF, CG,
CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: Korean (KO)
Description
METHOD OF AND MODULE FOR DETECTING ELECTROMAGNETIC WAVES OF ILLEGAL
WIRELESS DEVICES, AND MOBILE DEVICE WITH ELECTROMAGNETIC WAVE
DETECTING FUNCTION USING THE SAME Technical Field
[1] The present invention relates to a radio wave detection method
and a radio wave detection module for detecting illegal radio
devices, and a mobile device having a radio wave detection function
using the method and the module, and more specifically, to a radio
wave detection method and a radio wave detection module for detecting
illegal radio devices, and a mobile device having a radio wave
detection function using the method and the module, for effectively
detecting a radio signal transmitted from an illegal radio device,
such as an eavesdropping device, a monitoring device, or a hidden
camera used to violate privacy or leak information. Background Art
[2] Recently, as eavesdropping devices, monitoring devices, and
hidden cameras are illegally used, privacy of an individual and human
rights are so frequently and seriously violated as to become a social problem.
[3] At this point, devices such as eavesdropping devices, monitoring
devices, and hidden cameras receive and transmit information in a
radio communication method by nature, and each country regulates the
devices to use a radio wave of a frequency band different from that
of general communication equipment. That is, eavesdropping devices
and monitoring devices distributed in the market do not use a
plurality of unspecific frequency bands as a frequency band. For
example, Information and Communication Department in Korea allocates
four bands of 2410 MHz, 2430 MHz, 2450 MHz, and 2470 MHz as image
transmission bands, which are called as 'Specific low power radio
station frequencies' for 'radio transmission image devices' used as a
hidden camera. Therefore, most of products using the 'radio
transmission image devices' distributed in Korea use frequencies of
the four bands. Here, since a unidirectional voice transmission
frequency is not allocated for wireless eavesdropping devices among
low power radio devices in Korea, the most actively distributed
products in Korea are Japanese radio transmitters. Then, Japan
regulates frequency bands of radio transmitters to 398.605 MHz,
399.455 MHz, and 399.030 MHz.
[4] Accordingly, as a method for detecting an eavesdropping device,
monitoring device, and hidden camera using such a radio communication
method, a radio signal of
a frequency band used by these devices is extracted from a broadband
radio signal to determine existence of the eavesdropping device,
monitoring device, or hidden camera.
[5] "Hidden camera detection apparatus" of Korea Laid-open Patent Gazette
Publication No. 10-2001-0026373 proposes a technique for detecting
hidden cameras operating in the neighborhood, in which the hidden
camera detection apparatus comprises a detection unit for detecting
external signals, a signal amplification unit electrically connected
to the detection unit, for amplifying signals outputted from the
detection unit, an alarm unit for generating alarm sounds, and a
control unit electrically connected to the signal amplification unit
and the alarm unit, for controlling signals outputted from the signal
amplification unit to operate the alarm unit.
[6] "Eavesdropping device/Hidden camera detection apparatus" of Korea Patent
Gazette Registration No. 10-0552116 proposes a technique for
detecting eavesdropping devices and hidden cameras of a variety of
frequency bands, in which a low band and a high band antenna for
detecting low band and high band RF signals from RF signals are used
to detect and analyze signals of a specific frequency by periodically
sweeping signals from low frequency of 1.7 MHz to high frequency of 3 GHz.
[7] "Eavesdropping and monitoring device and Hidden camera detector" of Korea
Patent Gazette Registration No. 10-0340822 proposes a technique for
preventing erroneous operations caused by cellular phone signals, in
which the eavesdropping and monitoring device and hidden camera
detector comprises a high frequency input unit for receiving high
frequency signals generated by eavesdropping and monitoring devices
or hidden cameras through an antenna, and a tuning unit for tuning
only those signals having frequencies in the range of 80 to 700 MHz
among the signals received by the high frequency input unit, in which
a precise frequency selection unit for blocking signals in the range
of 750 to 850 MHz generated by cellular phones among the frequencies
tuned by the tuning unit is installed in the high frequency input unit.
[8] "Radio wave detector for detecting radio waves of hidden cameras
and eavesdropping devices" of Korea Utility Model Gazette
Registration No. 20-0262547 proposes a technique for obtaining stable
signals having very high amplification degree and amplification
cut-off frequency without loss of signal transfer by using a super-
low noise voltage amplifying field-effect transistor (GaSa MESFET),
having a noise figure below 0.7 dB at the frequency of 4 GHz with
high input impedance, in a high frequency receiving and amplification unit.
[9] However, the conventional techniques do not provide a clear
determination criterion for detecting illegal radio devices, but only
provide theoretical techniques for receiving a broadband radio signal
and extracting a radio signal of a frequency band used by an illegal
radio device, or general techniques for detecting an illegal radio
device using a
supersonic sensor or the like without regard to acquiring a radio
signal. At this point, since a conventional technique proposed to
detect an illegal radio device by receiving a radio signal receives a
broadband radio signal A as shown in FIG. 1, there is a problem in
that it is difficult to detect existence of an illegal radio device
stably and effectively. That is, according to the conventional
technique, existence of an illegal radio device is determined through
a narrowband radio signal B including a radio signal of a frequency
band used by the illegal radio device, and there is a problem in that
such a narrowband radio signal is overlapped with frequencies used by
other devices, as well as with a specific frequency of the illegal
radio device, as shown in FIG. 1. For example, wireless eavesdropping
devices and a trunked radio system (TRS) use a frequency band of 400
MHz, cellular phones use a frequency band of 800 MHz, cordless phones
use a frequency band of 900 MHz, hidden cameras, CCTVs, and the like
use a frequency band of 2400 to 2470 MHz, and wireless LAN and Blue
tooth use a frequency band of 2427 to 24000 MHz, and thus a
narrowband radio signal (conventionally, a technique for detecting
illegal radio devices extracts a frequency band corresponding to "B"
of FIG. 1 to determine existence of an illegal radio device) includes
radio signals (frequencies) of a variety of devices.
[10] Accordingly, according to conventional techniques, a criterion
for determining existence of an illegal radio device is not clear and
ineffective, and thus there is a problem in that the configuration of
an apparatus for accurately separating and processing a radio signal
of a frequency band used by an illegal radio device is so complex
when the apparatus is implemented that the apparatus cannot be easily
miniaturized. Then, noises or erroneous signals making the apparatus
unstable are inputted in the process of separating a narrowband radio
signal from a received broadband radio signal and processing the
separated narrowband radio signal, and thus there is a problem in
that response and detection efficiency for radio signals of illegal
radio devices is not so high.
[11] On the other hand, as requests for detection of illegal radio
devices are increased, proposed is a variety of mobile devices
applied with a function for detecting illegal radio devices, such as
an MP3 player, personal digital assistant (PDA), digital camera, Play
Station Portable (PSP), calculator, and the like. Particularly, in
relation with cellular phones that have settled down as necessities
of life, introducing such a technique is actively reviewed. For
example, a technique for combining a function for detecting illegal
radio devices with a cellular phone is proposed, in a method of
adding a function for detecting wireless eavesdropping devices and
hidden cameras to a cellular phone and in a method of miniaturizing
an apparatus for detecting wireless eavesdropping devices and hidden
cameras to associated the function with a cellular phone.
[12] "Cellular phone embedded with apparatus for detecting
eavesdropping and monitoring device and hidden camera" of Korea
Laid-open Patent Gazette Publication No. 2001-0103469 proposes a
cellular phone capable of detecting eavesdropping and monitoring
devices and hidden cameras, in which a detector reception module for
receiving air frequencies of eavesdropping and monitoring devices and
hidden cameras and generating warning signals is added to a general
cellular phone, and a microprocessor, battery power, amplifier, and
speaker of the cellular phone of its own are shared as a warning
means. The cellular phone also comprises a mode selector switch for
separating or connecting the detector reception module depending on
an operation mode, and an external switch for arbitrarily blocking
battery power supplied to the detector reception module.
[13] "Cellular phone having a function for detecting hidden cameras
and eavesdropping devices" of Korea Patent Gazette Publication No.
2002-0016703 proposes a technique for splitting a signal received
through the antenna of a cellular phone into a signal of a frequency
band of the cellular phone and a signal of a frequency band of hidden
cameras and eavesdropping devices, receiving and detecting the signal
of a frequency band of hidden cameras and eavesdropping devices,
detecting intensity of an outputted signal, and determining
installation of a hidden camera or an eavesdropping device based on
the detected signal intensity.
[14] "Apparatus for detecting eavesdropping devices and hidden
cameras using mobile communication terminal" of Korea Patent Gazette
Publication No. 10-2006-0012938 proposes a technique for detachably
connecting a detection module for detecting eavesdropping devices and
hidden cameras to a mobile communication terminal so that the
detection module can be used whenever desired.
[15] However, such conventional techniques related to a cellular
phone providing a function for detecting illegal radio devices apply
a method of receiving a broadband radio signal and separating a
narrowband radio signal to determine existence of an illegal radio
device in the same manner as other conventional techniques, and thus
have the same problems. In addition, a detection module is configured
in order to apply a function for detecting illegal radio devices to a
cellular phone. However, as described above, an apparatus for
accurately separating and processing a radio signal of a frequency
band used by an illegal radio device is difficult to implement, and
thus the apparatus is difficult to be practically applied to a small
and thin cellular phone. For example, a system micro-controller
(referring to a microcomputer used for general system control, such
as an MPU or a CPU) is applied to a cellular phone in order to
implement a variety of functions of the cellular phone, and such a
system microcontroller has a limited number of analog-to-digital
converter ports (ADC ports) compared with the number of input-output
ports (IO ports) and has a limitation in
applying elements, which need to be installed to perform a detection
function for detecting illegal radio devices, due to a circuit board
having a limited space and structure, and thus there is a problem in
that capacity of the system micro-controller needs to be enhanced.
Furthermore, since a cellular phone according to such a conventional
technique receives a radio signal of an illegal radio device through
an antenna installed for performing communication functions, noises
or erroneous signals are inputted even while transmission and
receiving signals for communication are processed, and thus there is
a problem in that original functions of the cellular phone, including
communication functions, are degraded. Therefore, there is a problem
in that when the original functions of the cellular are used,
particularly, when the original functions of the cellular are used in
a communication that practically needs a detection function for
detecting illegal radio devices, the detection function for detecting
illegal radio devices cannot be used. Disclosure of Invention Technical Problem
[16] Accordingly, the present invention has been made in order to
solve the above problems, and it is an object of the invention to
provide a radio wave detection method and a radio wave detection
module of a new form for detecting illegal radio devices, in which
existence of an illegal radio device can be stably and effectively
detected compared with a conventional technique.
[17] Another object of the invention is to provide a radio wave
detection method and a radio wave detection module of a new form for
detecting illegal radio devices, in which a problem of making a
device unstable due to noises or erroneous signals inputted while
processing a received signal can be effectively removed, thereby
enhancing response and detection efficiency for a radio signal of an
illegal radio device.
[18] A further object of the invention is to provide a radio wave
detection method and a radio wave detection module of a new form for
detecting illegal radio devices, in which since the configuration is
simplified compared with a conventional technique in implementing an
apparatus for detecting the illegal radio devices, the apparatus can
be miniaturized, and a function for detecting the illegal radio
devices can be easily applied to a mobile device such as a cellular phone.
[19] A further object of the invention is to provide a radio wave
detection method and a radio wave detection module of a new form for
detecting illegal radio devices, in which since the module for
determining existence of an illegal radio device is particularly
constructed as an one chip, a function for detecting illegal radio
devices can be easily implemented in a mobile device, such as a
cellular phone, a digital camera,
PDA, and the like.
[20] A further object of the invention is to provide a mobile device
of a new form having a radio wave detection function for detecting
illegal radio devices, to which the radio wave detection method and
the radio wave detection module are applied, so that an illegal radio
device can be efficiently detected without deteriorating original
functions of the mobile device, unlike a conventional technique.
Technical Solution
[21] In order to accomplish the above objects of the invention,
according to one aspect of the invention, there is provided a radio
wave detection method for detecting an illegal radio device that uses
a radio signal of a designated frequency band, the method comprising
the steps of: receiving a narrowband radio signal including a radio
signal of a frequency band used by the illegal radio device through a
single frequency antenna, and obtaining a direct current voltage
value for a specific frequency of the illegal radio device by
serially processing the received narrowband radio signal;
transmitting the obtained direct current voltage value to a
micro-controller through an analog-to-digital converter port of the
micro-controller, and outputting a data value of a digital form from
the micro-controller; and externally displaying existence of the
illegal radio device through a display apparatus using the outputted
data value of a digital form.
[22] In the radio wave detection method for detecting an illegal
radio device according to the present invention, the step of
obtaining a direct current voltage value for a specific frequency of
the illegal radio device comprises the steps of: extracting the radio
signal of the frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna, using a band pass filter; and extracting the specific
frequency of the illegal radio device through an RF detector from the
radio signal extracted through the band pass filter, and converting
the extracted frequency into the direct current voltage value that is
an electrical signal transmitted to the analog-to-digital converter
port of the micro-controller.
[23] In the radio wave detection method for detecting an illegal
radio device according to the present invention, the step of
externally displaying existence of the illegal radio device through a
display apparatus using the outputted data value of a digital form
comprises the steps of: transmitting the data value of a digital form
outputted from the micro-controller to a system micro-controller
through an input-output port (IO port) of the system
micro-controller; and externally displaying the data value of a
digital form through the display apparatus under a control of the
system micro-controller.
[24] According to another aspect of the invention, there is provided
a radio wave detection module for detecting an illegal radio device
that uses a radio signal of a designated frequency band, the module
comprising: a single frequency antenna
selected from a group comprising a loop antenna, a micro-strip
antenna, and a chip antenna, for receiving a narrowband radio signal
including a radio signal of a frequency band used by the illegal
radio device; a radio signal processing unit for obtaining a direct
current voltage value for a specific frequency of the illegal radio
device by serially processing the narrowband radio signal received
from the single frequency antenna; and a micro-controller for
outputting the direct current voltage value obtained from the radio
signal processing unit as a data value of a digital form.
[25] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are installed to be mounted on a circuit board of a device having a
function for detecting the illegal radio device.
[26] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are formed as a single chip.
[27] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are formed as a single chip mounted on a chip socket that is
installed on a circuit board of a device, which is provided with a
separate system micro-controller to have a function for detecting an
illegal radio device, to be contact with an IO port of the system
micro-controller, so that the data value of a digital form outputted
from the micro-controller is inputted into the system micro-controller.
[28] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the radio signal
processing unit comprises: a band pass filter for extracting the
radio signal of the frequency band used by the illegal radio device
from the narrowband radio signal received through the single
frequency antenna; and an RF detector for extracting the specific
frequency of the illegal radio device from the radio signal extracted
through the band pass filter, and converting the extracted frequency
into the direct current voltage value that is an electrical signal
transmitted to the analog-to-digital converter port of the micro-controller.
[29] According to another aspect of the invention, there is provided
a mobile device having a radio wave detection function for detecting
an illegal radio device that uses a radio signal of a designated
frequency band, the mobile device comprising: a system
micro-controller mounted with a program for performing the function
for detecting an illegal radio device that uses a radio signal of a
designated frequency band, for performing original functions of the
mobile device; and a radio wave detection module connected to the
system micro-controller to be supplied with power from a battery of
the mobile device, for transmitting a result of detecting the illegal
radio device to the system micro-controller, wherein the radio wave
detection module is provided with a
single frequency antenna selected from a group comprising a loop
antenna, a micro- strip antenna, and a chip antenna, for receiving a
narrowband radio signal including a radio signal of a frequency band
used by the illegal radio device.
[30] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module comprises: a band pass filter for
extracting a radio signal of a frequency band used by the illegal
radio device from the narrowband radio signal received through the
single frequency antenna; and an RF detector for extracting the
specific frequency of the illegal radio device from the radio signal
extracted through the band pass filter, and converting the extracted
frequency into a direct current voltage value that is an electrical
signal transmitted to an analog-to-digital converter port of the
system microcontroller.
[31] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module comprises: a band pass filter for
extracting a radio signal of a frequency band used by the illegal
radio device from the narrowband radio signal received through the
single frequency antenna; and an RF detector for extracting the
specific frequency of the illegal radio device from the radio signal
extracted through the band pass filter, and converting the extract
frequency into a direct current voltage value; and a detection
micro-controller for receiving the direct current voltage value
obtained by the RF detector through an analog-to-digital converter
port, converting the direct current voltage value into a data value
of a digital form through an internal operation, and transmitting the
data value of a digital form to the system micro-controller through
an IO port of the system micro-controller.
[32] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module is formed as a single chip installed
in a main body of the mobile device where the system micro-controller
is installed.
[33] The mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention
further comprises an external line connection terminal connected to
the system micro-controller, wherein the radio wave detection module
is installed in a constitutional part of the mobile device selected
among a group comprising a battery, earphone, microphone, Bluetooth,
and memory stick, and thus when the constitutional part of the mobile
device is connected to the external line connection terminal, the
radio wave detection module is connected to the system
micro-controller and performs the function for detecting an illegal
radio device.
[34] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module is
installed to be mounted on a circuit board of the mobile device.
[35] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the single frequency antenna of the radio wave detection module is
installed to be formed in a shape of a pattern on an inner surface of
a housing of the main body of the mobile device.
Advantageous Effects
[36] According to a radio wave detection method and a radio wave
detection module for detecting illegal radio devices, since a
narrowband radio signal including a radio signal of a frequency band
used by an illegal radio device is received using single frequency
antennas and processed in serial, the illegal radio device can be
detected with excellent stability and high response and detection
efficiency compared with conventional techniques. Particularly, since
a direct current voltage for a specific frequency of the illegal
radio device is obtained through a serial process after receiving a
narrowband radio signal including a radio signal of a frequency band
used by the illegal radio device using single frequency antennas, a
problem of making a mobile device unstable due to noises or erroneous
signals inputted while processing the received signal can be
effectively removed, and thus response and detection efficiency for
the radio signal of the illegal radio device can be enhanced. In
addition, in implementing an apparatus for detecting illegal radio
devices, the present invention can be configured in a form of a
module utilizing active elements and passive elements, and the module
can be installed in a circuit board or configured as a single chip.
Therefore, since the configuration is simplified compared with
conventional techniques, the apparatus can be miniaturized, and a
function for detecting illegal radio devices can be easily applied to
a mobile device such as a cellular phone. In addition, since the
present invention can be configured to output a data value of a
digital form through the micro-controller (microcomputer) installed
in itself, a hardware configuration for detecting a radio signal of
an illegal radio device does not need to be additionally configured
in a mobile device such as a cellular phone, and thus the present
invention is highly compatible with a variety of mobile devices.
Particularly, since the radio wave detection module according to the
present invention can be configured as a single chip, a wave radio
detection function for detecting illegal radio devices can be applied
only by adding a configuration (a socket or an external line
connection terminal) for combining a radio wave detection circuit to
a desired mobile device such as a cellular phone, and thus burdens on
designing a desired device to which the present invention is applied
can be diminished. Furthermore, unlike conventional techniques, in
the present invention, since a module having a radio wave detection
function for detecting illegal radio devices can be added while
diminishing burdens on designing a module of a mobile
device, an illegal radio device can be detected stably and
efficiently without deteriorating original functions of the mobile
device. Particularly, since single frequency antennas are installed
in addition to the antenna of the mobile device and a detection
micro-controller for performing the radio wave detection function is
configured in addition to the system micro-controller, the radio wave
detection function is separated from the original functions of the
mobile device to stably and efficiently perform the detection
function, and the mobile device can smoothly perform its original
functions. In addition, since single frequency antennas are installed
in addition to the antenna of the mobile device, it is advantageous
in that a modification of design for installing the antennas is not
required to a mobile device that does not use an antenna, such as a
calculator, digital camera, PSP, and the like. Brief Description of
the Drawings
[37] Further objects and advantages of the invention can be more
fully understood from the following detailed description taken in
conjunction with the accompanying drawings in which:
[38] FIG. 1 is a graph illustrating background techniques and
problems of conventional techniques;
[39] FIG. 2 is a view illustrating a radio wave detection method for
detecting illegal radio devices according to the technical spirit of
the present invention;
[40] FIG. 3 is a graph illustrating an example of a radio wave
detection method for detecting illegal radio devices according to a
preferred embodiment of the present invention;
[41] FIG. 4 is a view showing a radio wave detection module for
detecting illegal radio devices according to the technical spirit of
the present invention;
[42] FIG. 5 is a block diagram illustrating a radio wave detection
module for detecting illegal radio devices according to a preferred
embodiment of the present invention;
[43] FIG. 6 is a view illustrating an example of implementing the
radio wave detection circuit for detecting illegal radio devices
shown in FIG. 5;
[44] FIG. 7 is a view illustrating another example of implementing
the radio wave detection circuit for detecting illegal radio devices
shown in FIG. 5;
[45] FIG. 8 is a block diagram illustrating a mobile device having a
radio wave detection function for detecting illegal radio devices
according to a preferred embodiment of the present invention;
[46] FIG. 9 is a view illustrating an example of implementing a
cellular phone as an example of a mobile device having a radio wave
detection function for detecting illegal radio devices shown in FIG. 6; and
[47] FIG. 10 is a view illustrating another example of implementing a
cellular phone as
an example of a mobile device having a radio wave detection function
for detecting illegal radio devices shown in FIG. 6. [48]
Best Mode for Carrying Out the Invention
[49] Hereinafter, the preferred embodiments of the present invention
will be described in detail with reference to FIGS. 2 to 10 of the
accompanying drawings. Furthermore, in FIGS. 2 to 10 of the drawings
illustrating the embodiments of the invention, elements having like
functions will be denoted by like reference numerals and details
thereon will not be repeated.
[50] FIG. 2 is a view illustrating a radio wave detection method for
detecting illegal radio devices according to the technical spirit of
the present invention, FIG. 3 is a graph illustrating an example of a
radio wave detection method for detecting illegal radio devices
according to a preferred embodiment of the present invention, and
FIG. 4 is a view showing a radio wave detection module for detecting
illegal radio devices according to the technical spirit of the
present invention.
[51] Referring to FIGS. 1 to 4, an object of the present invention is
to detect illegal radio devices, such as an eavesdropping device, a
monitoring device, or a hidden camera, that is maliciously used to
violate privacy or leak information using a radio signal of a
designated frequency band (hereinafter, referred to as an illegal
radio device), and there is provided a radio wave detection method
for detecting illegal radio devices and a radio wave detection module
comprising constitutional elements for implementing the method.
[52] The radio wave detection method for detecting illegal radio
devices according to the present invention receives a narrowband
radio signal, processes the narrowband radio signal in serial
(continuously processes the narrowband radio signal in a row through
a radio signal processing unit 30 comprising a band pass filter 32
and an RF detector 34), obtains a direct current voltage value for a
radio signal of a specific frequency, outputs the obtained direct
current voltage value as a data value of a digital form, and displays
the data value of a digital form outside through a display apparatus
60 (i.e., a display 62, a speaker 64, or a light emitting diode LED
shown in FIG. 8), which is processed by a radio wave detection
circuit 10 where these steps are configured as a module. At this
point, if a micro-controller 40 for outputting the direct current
voltage value for a radio signal of a specific frequency as a data
value of a digital form is used as a microcontroller of equipment
dedicated for detecting illegal radio devices or of a mobile device
of its own, the display apparatus 60 is controlled by the
micro-controller 40, whereas if the radio wave detection module of
the present invention formed to be easily installed in a mobile
device is configured as a single chip or an independent
module, the display apparatus 60 is controlled by a system
micro-controller 50 (e.g., a system micro-controller 50 of a cellular
phone 100 in the present invention) of the mobile device to
externally display the data value of a digital form.
[53] Describing in detail referring to FIGS. 1 to 4, a narrowband
radio signal including a radio signal of a frequency band used by an
illegal radio device is received through a single frequency antenna
20. Accordingly, compared with a conventional method of receiving an
unspecific radio signal (a broadband radio signal) using an antenna
having a reception rate of a plurality of comparatively wide
frequency bands, the radio wave detection method is a method of
receiving a radio signal of a frequency band used by an illegal radio
device. Therefore, a specific radio signal is selectively received
and simply processed, and thus a compact radio wave detection circuit
can be configured.
[54] The narrowband radio signal received as such is serially
processed, and a direct current voltage value for the specific
frequency band of the illegal radio device is obtained. At this
point, the direct current voltage value is obtained by extracting a
radio signal of a frequency band used by the illegal radio device
through the band pass filter 32, extracting a specific frequency of
the illegal radio device through the RF detector 34, and converting
the radio signal of the extracted specific frequency into the direct
current voltage value. That is, the direct current voltage value for
a specific frequency of an illegal radio device is obtained through
the steps of extracting a radio signal of a frequency band used by
the illegal radio device from the narrowband radio signal received
through the single frequency antenna 20 through the band pass filter
32, extracting a specific frequency of an illegal radio device
through the RF detector, and converting the radio signal of the
extracted specific frequency into the direct current voltage value,
which is an electrical signal transmitted to an analog-to-digital
port of the micro-controller 40.
[55] The direct current voltage value for a specific frequency of an
illegal radio device obtained as such is outputted as a data value of
a digital form through the microcontroller 40. That is, the
micro-controller 40 outputs the voltage (direct current voltage
value) flowing into the ADC port through the RF detector 34 as a code
of a digital form through an operation process set in the
micro-controller. At this point, the method of outputting the direct
current voltage value as a data value of a digital form using the
micro-controller 40 of the present invention can be easily applied to
the mobile device 100 such as a cellular phone 100 and 100' (refer to
FIGS. 9 and 10) that will be described below, particularly if the
method is implemented in a single chip. That is, according to a
conventional technique, when a separate apparatus having a radio wave
detection function (generally, a detector) is implemented, or the
radio wave detection function is added to a mobile device such as a
cellular phone, they should be designed using the ADC port of the
micro-controller (corresponding to the system
micro-controller 50 of the present invention) of the mobile device
100. Therefore, the ADC port should be reflected from the initial
design of the cellular phone, and the radio wave detection function
for detecting illegal radio devices should be additionally reflected
when an operation program of the cellular phone is created.
Contrarily, according to the present invention, since the
micro-controller 40 outputs a code of a digital form and uses an VO
port of the system micro-controller 50 of the mobile device 100, the
radio wave detection function for detecting illegal radio devices can
be applied to the mobile device 100, such as the cellular phone 100
and 100', only through software upgrade (a general method of
installing and using a program in a cellular phone), without a need
of additional hardware configuration (needless to say, a chip socket
114 (refer to FIG. 9) combined and connected to the radio wave
detection module 10 according to the present invention or an external
line connection terminal 130 (refer to FIG. 10) needs to be
configured). Needless to say, the radio wave detection module that
implements the radio wave detection function for detecting illegal
radio devices of the present invention described above is implemented
to be installed on a circuit board in the form of an active element
or a passive element, and a micro-controller (referred to as a system
micro-controller 50 in the present invention) installed for
performing original functions of a general mobile device can be used
as the micro-controller 40 for outputting the code of a digital form.
[56] As described above, in the radio wave detection method for
detecting illegal radio devices according to the present invention,
the step of receiving a narrowband radio signal including a radio
signal of a frequency band used by an illegal radio device and
obtaining a direct current voltage value for a specific frequency of
the illegal radio device, and the step of outputting a data value of
a digital form are performed by the radio wave detection circuit 10
comprising the single frequency antenna 20, the radio signal
processing unit 30, and the detection micro-controller 40, and
existence of an illegal radio device is externally displayed through
the display apparatus 60 using the data value of a digital form.
Here, an LED or LCD display, a buzzer, a speaker, or the like can be
applied as the display apparatus 60, and if a device dedicated for
detecting illegal radio devices (detector) or the system
micro-controller 50 is used as the microcontroller 40 for outputting
the data value of a digital form, the data value is transmitted under
the direct control of the micro-controller 40. Then, in the case of
the mobile device 100, such as a cellular phone, additionally
provided with the radio wave detection function for detecting illegal
radio devices, the data value of a digital form is outputted to the
I/O port of the system micro-controller 50 (e.g., a system
microcontroller of a cellular phone) installed outside of the radio
wave detection circuit 10 configured as a module, and the data value
of a digital form is externally displayed through a display apparatus
(as shown in FIG. 9, the display 62 or the speaker 64 of the
cellular phone 100) under the control of the system micro-controller 50.
[57] Referring to FIG. 4, the radio wave detection module 10 for
detecting illegal radio devices according to the present invention
comprises a single frequency antenna 20, a radio signal processing
unit 30, and a micro-controller 40 in order to implement the radio
wave detection method for detecting illegal radio devices as describe
above, and outputs a result of determining existence of an illegal
radio device as a data value of a digital form with respect to a
specific frequency.
[58] Describing in further detail, the single frequency antenna 20
can be configured selectively using a loop antenna, a micro strip
antenna, a chip antenna, or the like in order to receive a narrowband
radio signal including a radio signal of a frequency band used by an
illegal radio device. Such a single frequency antenna 20 is
configured to receive radio signals limited to a radio signal of a
specific band including a radio signal of a frequency band used by
the illegal radio device, unlike a general antenna that receives an
unspecific radio signal or a radio signal of a wide range. The radio
signal processing unit 30 processes the narrowband radio signal
received from the single frequency antenna 20 in serial and obtains a
direct current voltage value for a specific frequency of the illegal
radio device. In the present invention, such a radio signal
processing unit 30 comprises a band pass filter 32 and an RF detector
34. Here, the band pass filter 32 extracts a radio signal of a
frequency band used by the illegal radio device from the narrowband
radio signal received from the single frequency antenna 20, and the
RF detector 34 extracts a specific frequency of the illegal radio
device from the radio signal extracted through the band pass filter
32 and converts the radio signal of the extracted frequency into a
direct current voltage value, which is an electrical signal
transmitted to the analog-to-digital converter port of the micro-controller 40.
[59] As described above, the radio wave detection module 10 of the
present invention is provided with the micro-controller 40 for
outputting the direct current voltage value for a specific frequency
of the illegal radio device obtained by the radio signal processing
unit 30 as a data value of a digital form, and obtains a data value
that is a result of finally determining existence of an illegal radio
device. Accordingly, in the present invention, since a specific radio
signal is selectively received and the signal is promptly processed
through a simply configured circuit, a high response and detection
efficiency for an illegal radio device is secured together with
stability. Furthermore, constitutional elements for detecting illegal
radio devices can be super-miniaturized, and thus they can be easily
embedded in a mobile device such as a cellular phone.
[60] Here, illegal radio devices detected by the present invention
include a wireless eavesdropping device, a wireless monitoring
device, a hidden camera, and the like, and the present invention is
configure to detect only one illegal radio device selected among the
above illegal radio devices (such a selection can be controlled by software,
or automatically controlled through a serial communication between
the detection micro-controller(processor) 40 and the system
micro-controller(processor) 50. Alternatively, as shown in FIGS. 5
and 8, a plurality of single frequency antennas 20a, 20b, and 20c,
band pass filters 32a, 32b, and 32c, and RF detectors 34a, 34b, and
34c are installed, and two or more of the single frequency antennas,
band pass filters, and RF detectors selected among them (in software)
simultaneously detect two or more illegal radio devices. Needless to
say, as described above, according to the present invention, if the
radio wave detection module 10 is configured as a single chip, the
configuration can be simply modified when needed by replacing the
radio wave detection module and upgrading software. For example, when
a cellular phone, mounted with the radio wave detection module for
detecting illegal radio devices, used in Korea is to be used in
Japan, it is possible to replace the radio wave detection module with
a radio wave detection module designed to detect an illegal radio
device of a specific frequency applied in Japan.
[61] FIG. 5 is a block diagram illustrating a radio wave detection
module for detecting illegal radio devices according to a preferred
embodiment of the present invention.
[62] Referring to FIG. 5, the radio wave detection module 10 for
detecting illegal radio devices according to a preferred embodiment
of the present invention uses three single frequency antennas 20 for
receiving a radio signal of a specific frequency band used by an
illegal radio device respectively, i.e. a first single frequency
antenna 20a, a second single frequency antenna 20b, and a third
single frequency antenna 20c. A receive narrowband radio signal is
serially processed by the radio signal processing unit 30 and
outputted as a data value of a digital form through the detection
micro-controller 40, and thus constitutional elements are
miniaturized with high stability. That is, since a conventional radio
wave detection apparatus for detecting illegal radio devices receives
an unspecific radio signal through an antenna and removes the
unspecific signal through an internal circuit of the radio wave
detection apparatus, noises or erroneous signals are frequently
inputted in the process of correctly separating and processing a
radio signal of a specific frequency band transmitted by an illegal
radio device, and therefore, the apparatus is unstable, and the
response and detection efficiency for the radio signal of the illegal
radio device is not so high. Contrarily, in the present invention, as
described above, since a radio signal limited to a specific frequency
used by an illegal radio device is received from the step of
receiving the radio signal, the problem of noises or erroneous
signals inputted while processing the signal is minimized, and thus
excellent stability and high response and detection efficiency can be
obtained. Particularly, since the single frequency antenna 20 for
receiving a radio signal of an illegal radio device is installed in
addition to a (communication) dedicated antenna, such as an antenna
of a cellular phone, the problem of noises or erroneous
signals inputted while processing the signal can be removed compared
with conventional techniques, and the radio wave detection function
for detecting illegal radio devices can be quite easily installed in
a mobile device that does not have a dedicated antenna, such as a
digital camera.
[63] At this point, as it is noted, the illegal radio devices include
a wireless eavesdropping device, a wireless monitoring device, a
hidden camera, and the like, and generally, the wireless
eavesdropping device, wireless monitoring device, and hidden camera
do not use a unspecific many frequency band as a frequency band. That
is, in Korea, the frequency band of a radio transmission image device
used as a hidden camera is limited to four bands of 2410 MHz, 2430
MHz, 2450 MHz, and 2470 MHz for image transmission, which is called
as a frequency for specific low power radio station , and thus radio
transmission image devices in Korea use frequencies of the four
bands. Then, in Japan, the frequency band of a radio transmission
image device is limited to 1200 MHz. Accordingly, the second and
third single frequency antennas 20b and 20c that respectively receive
a radio signal of frequency bands of 1.2 GHz and 2.4 GHz are used to
detect a hidden camera. At this point, since the frequency band of a
radio transmitter is limited to 400 MHz in Japan, the first single
frequency antenna 20a that receives a radio signal of a frequency
band around 400 MHz is used to detect a wireless eavesdropping device.
[64] On the other hand, the radio wave detection module 10 according
to a preferred embodiment of the present invention applies the first
single frequency antenna 20a, the second single frequency antenna
20b, and the third single frequency antenna 20c that respectively
receive a radio signal of frequency bands around 400 MHz, 1.2 GHz,
and 2.4 GHz in order to have a function for detecting both of the
wireless eavesdropping device and the wireless monitoring device.
Particularly, the first single frequency antenna 20a, as shown in
FIGS. 6 and 7, applies a loop antenna for receiving a radio signal
including 400 MHz to detect a wireless eavesdropping device that uses
a frequency band around 400 MHz, and the second and third single
frequency antennas 20b and 20c apply a micro strip antenna or a chip
antenna for receiving a radio signal of a frequency band of 1.2 GHz
to detect a hidden camera that uses a frequency band around 1.2 GHz
and 2.4 GHz , which is higher than that of the first single frequency
antenna 20a. Needless to say, although all of the first, second, and
third single frequency antennas 20a, 20b, and 20c for a receiving
radio signal of frequency bands of 400 MHz, 1.2 GHz, and 2.4 GHz are
applied in the preferred embodiment of the present invention, the
number and types of such single frequency antennas can be changed as
needed. Furthermore, although the first, second, and third single
frequency antennas 20a, 20b, and 20c are basically installed as a
pattern or an element on a circuit board where the radio wave
detection module are configured, they can be applied on
the inner surface of the housing of a mobile device considering the
trend of miniaturizing mobile devices such as a cellular phone (The
first, second, and third single frequency antennas can be configured
on the inner surface 122 of the housing 120 configuring the case of
the body of the cellular phone 100 as shown in FIG. 9. Such a pattern
can be generally configured in the process of forming a shield on the
inner surface of a housing 120, and such a manufacturing process is a
technique well- known in the art. Since such a pattern can be easily
configured with the technique, detailed description thereof will be omitted).
[65] The radio signals received through the first, second, and third
single frequency antennas 20a, 20b, and 20c are serially processed
through the radio signal processing unit 30 comprising the band pass
filter 32 and the RF detector 34, and a direct current voltage value
is obtained for a specific frequency band of an illegal radio device.
That is, although the radio signal received through the single
frequency antenna 20 is a narrowband radio signal having a certain
range from the specific frequency used by the illegal radio device
compared with a signal received through a general antenna, since the
radio signal received through the single frequency antenna is always
mixed with noises due to a characteristic of a radio wave signal, the
band pass filter 32 for passing through a radio signal of a frequency
band (400 MHz, 1.2 GHz, and 2.4 GHz in the present embodiment) used
by the illegal radio device is applied to filter unnecessary noises
through the band pass filter 32. Then, the radio signal outputted
from the band pass filter 32 is received through the RF detector 34,
and a specific frequency of the illegal radio device is extracted and
converted into a direct current voltage value, which is a signal
inputted into the ADC port of the detection micro-controller 40.
According to a preferred embodiment of the present invention, the
band pass filter 32 of the radio signal processing unit 30 comprises
a first band pass filter 32a, a second band pass filter 32b, and a
third band pass filter 32c respectively corresponding to and
connected to the first single frequency antenna 20a, the second
single frequency antenna 20b, and the third single frequency antenna
20c described above, and the RF detector 34 comprises a first RF
detector 34a, a second RF detector 34b, and a third RF detector 34c
successively connected to the first band pass filter 32a, the second
band pass filter 32b, and the third band pass filter 32c in order to
serially process the radio signal in association with the band pass filter 32.
[66] On the other hand, in the present embodiment, the detection
micro-controller 40 outputs the direct current voltage values applied
from the first, second, and third RF detectors 34a, 34b, and 34c
through the ADC port as codes (data value) of a digital form through
a predetermined operation process, and the outputted codes are
transmitted to the system micro-controller 50 of a mobile device to
which the present invention is applied, such as a cellular phone.
Needless to say, if a detector dedicated
for detecting illegal radio devices is used, or the system
micro-controller 50 is used as the detection micro-controller 40, the
detection micro-controller 40 can directly control a display, LED,
buzzer, and the like to externally display the data values. As
described above, since a radio signal of an analog form is outputted
as a data value of a digital form, the radio wave detection module 10
according to the present invention can be very easily applied to a
mobile device such as a cellular phone. That is, according to the
present invention, if a data value is outputted, an illegal radio
device exists in the neighborhood of a place where radio waves of
illegal radio devices are detected, whereas if a data value is not
outputted, an illegal radio device does not exist in the neighborhood
of a place where radio waves of illegal radio devices are detected.
In addition, it is assumed that if magnitude of the outputted signal
is gradually increased as the location is moved from the place where
radio waves of illegal radio devices are detected, the illegal radio
device is getting closer, whereas if magnitude of the outputted
signal is gradually decreased as the location is moved from the place
where radio waves of illegal radio devices are detected, the illegal
radio device is getting farther.
[67] As described above, in the radio wave detection module 10
according to a preferred embodiment of the present invention, since
narrowband radio signals received through the first, second, and
third single frequency antennas 20a, 20b, and 20c are serially
processed through active elements and passive elements configuring
the first, second, and third band pass filters and the first, second,
and third RF detectors 34a, 34b, and 34c, signal processing is
performed in a speedy way compared with conventional techniques in
which the received signals are processed by a separate complex
circuit structure, such as a detector, amplifier, and the like, and
thus response and detection efficiency for an illegal radio device is
enhanced, and the radio wave detection module can have excellent stability.
[68] FIG. 6 is a view illustrating an example of implementing the
radio wave detection circuit for detecting illegal radio devices
shown in FIG. 5, and FIG. 7 is a view illustrating another example of
implementing the radio wave detection circuit for detecting illegal
radio devices shown in FIG. 3.
[69] Referring to FIGS. 6 and 7, as described above, in the radio
wave detection module
10 for detecting illegal radio devices according to a preferred
embodiment of the present invention, since constitutional elements
can be simplified and minimized, the element configuring the radio
wave detection module 10 are integrated to be easily configured in
the form of a super-micro element or a chip.
[70] Since such a radio wave detection module 10 can be configured as
an independent module of a super-micro size, if it is installed or
mounted on the mobile device 100 such a cellular phone 100 and 100'
(refer to FIGS. 9 and 10), input and output of
signals are performed independently from original functions of the
mobile device. Therefore, signal interference or operation
interference accompanied by performing both of the functions are
prevented, and the radio wave detection module 10 is standardized as
a single chip to be conveniently and simply mounted on the mobile device 100.
[71] Such a radio wave detection module 10 can be modularized in a
variety of forms.
That is, as shown in FIG. 6, the radio wave detection module can be
configured by installing the first, second, and third single
frequency antennas 20a, 20b, and 20c, and mounting the elements that
configure the band pass filter 32, the RF detector 34, and the
detection micro-controller 40 on a circuit board 12 formed as a small
thin plate (such a circuit board 12 can be a circuit board for
configuring a single chip or a circuit board configuring a mobile
device). Alternatively, as shown in FIG. 7, the radio wave detection
module can be configured by installing the first, second, and third
single frequency antennas 20a, 20b, and 20c, and mounting the
elements that configure the band pass filter 32, the RF detector 34,
and detection micro-controller 40 on a plurality of circuit boards
12a, 12b, and 12c formed as a multi-layer or a specific structure.
Needless to say, the first, second, and third single frequency
antennas 20a, 20b, and 20c, the band pass filter 32, the RF detector
34, and the detection micro-controller 40 can be diversely arranged
depending on the condition of design, and its wiring can be set based
on a technique for configuring a general circuit board. Then, as
described above, the first, second, and third single frequency
antennas 20a, 20b, and 20c can be configured using a technique for
utilizing space, in the form of a shield wrapping around the radio
wave detection module 10 or in the form of a pattern within the
housing of a mobile device (in the case of the cellular phone 100,
the inner side 122 of the housing 120) in which the radio wave
detection module 10 is installed.
[72] At this point, in a preferred embodiment of the present,
considering the characteristic of an antenna that the length is
inverse proportional to the magnitude of a frequency, a loop antenna
that can be extended in a narrow space is applied as the first single
frequency antenna 20a assigned for wireless eavesdropping devices
that transmit radio signals of a 400 MHz frequency band, and a
super-thin micro strip or chip antenna, which can be directly
installed on the surface of a circuit board, is used as the second
and third single frequency antennas 20b and 20c assigned for hidden
cameras that transmit radio signals of 1.2 GHz and 2.4 GHz frequency
bands. Then, all of the loop antenna, the micro strip antenna, and
the chip antenna used as the first, second, and third single
frequency antennas 20a, 20b, and 20c in the present invention can be
manufactured in a super-micro size, and thus space can be utilized
maximally. Needless to say, as described above, if the radio wave
detection module 10 is configured to detect only either of the
illegal radio devices, i.e., the wireless
eavesdropping device or the hidden camera, any one selected among the
first, second, and third single frequency antennas 20a, 20b, and 20c
can be applied.
[73] Since such a radio wave detection module 10 according to the
present invention is embedded with the first, second, and third
single frequency antennas 20a, 20b, and 20c, if the radio wave
detection module is installed in a mobile device such as a cellular
phone to allows a function for detecting illegal radio devices, it
will receive only a specific radio signal of a frequency band of a
radio signal transmitted by a wireless eavesdropping device or a
hidden camera, independently from the antenna of the mobile device.
Therefore, according to the present invention, the problem of noises
or signal interference of a cellular phone having a conventional
radio detection function, which is occurred in the process of
simultaneously receiving a communication signal of the cellular phone
and a radio signal transmitted by a wireless eavesdropping device or
a hidden camera through an embedded antenna, separating the received
signal, and processing the separated signal, can be solved.
[74] In addition, if the radio wave detection module 10 of the
present embodiment is configured as a single chip, a power terminal
14 in contact with the circuit board 12 for applying power from
outside, an output terminal 16 for inputting and outputting data, and
a ground terminal 18 are installed, and such a configuration can be
set depending on the type of the chip. For example, although the
power terminal 14, the output terminal 16, and the ground terminal 18
are installed at one side of the circuit board 12 in FIGS. 6 and 7,
if the chip is configured in a pin type or a connector type, a
configuration relevant to the type of the chip will be provided.
[75] FIG. 8 is a block diagram illustrating a mobile device having a
radio wave detection function for detecting illegal radio devices
according to a preferred embodiment of the present invention, FIG. 9
is a view illustrating an example of implementing a cellular phone as
an example of a mobile device having a radio wave detection function
for detecting illegal radio devices shown in FIG. 6, and FIG. 10 is a
view illustrating another example of implementing a cellular phone as
an example of a mobile device having a radio wave detection function
for detecting illegal radio devices shown in FIG. 6. At this point,
FIG. 9 (a) is a view schematically showing a circuit board 110 and a
housing 120 of a cellular phone separated from each other, and FIG. 9
(b) is a view showing the circuit board and the housing of FIG. 9 (a)
combined with each other. The cellular phone 100 shown in FIG. 9 is
an example for specifically describing the present invention and does
not limit the technical spirit of the present invention. In addition,
FIG. 10 is a view showing a battery 150a as an example among
constitutional parts 150 (refer to FIG. 8) of the cellular phone,
such as the battery, earphone, microphone, Bluetooth, memory stick,
and the like. FIG. 10 (a) is a view schematically showing a
disassembled state of the battery 150a, and FIGS. 10 (b) and (c) are views
schematically showing the front and rear sides of the battery 150a
before the battery is combined with the cellular phone 100. The
cellular phone 100 and the battery 150a shown in FIG. 10 are an
example for specifically describing the present invention and do not
limit the technical spirit of the present invention.
[76] Referring to FIGS. 8 to 10, the radio wave detection module 10
according to the present invention has a modular configuration for
detecting illegal radio devices as described above to output a result
of detecting illegal radio devices to itself, and thus the radio wave
detection module is advantageous in that it can be further easily
applied to the mobile device 100 such as a cellular phone.
Hereinafter, the mobile device 100 will be described in detail with
an example of the cellular phone 100 and 100'.
[77] The cellular phone 100 and 100' according to the present
invention is configured to be applied with the radio wave detection
module 10 having the configuration and operation described above to
have a radio wave detection function for detecting illegal radio
devices using a specific frequency. At this point, the cellular phone
100 and 100' according to the present invention basically has
functions of a general cellular phone, with which the radio wave
detection module 10 according to the present invention is
electrically contacted in order to transmit a data value of a digital
form outputted from the detection micro-controller 40 to the system
micro-controller 50 (refer to a microcomputer for controlling the
cellular phone 100 and 100' of the cellular phone 100 and 100'. The
system micro-controller 50 has a technical configuration for
controlling the display 62, i.e., a display apparatus, or the speaker
64 using the data value of a digital form transmitted from the
detection micro-controller 40 to externally display the data value.
Needless to say, as describe above, the system micro-controller 50 of
the cellular phone 100 and 100' can be applied as the detection
micro-controller 40, and since the detection micro-controller 40 is
replaced with the system microcontroller 50, detailed descriptions of
the operation according to such a configuration will be omitted.
[78] As a form implementing such a technique, as shown in FIG. 9, the
radio wave detection module can be mounted on the circuit board 110
of the cellular phone 100 (in the present embodiment, although the
main circuit board on which the system microcontroller 50 is
installed is shown, such a circuit board can be applied to other
circuit boards) to be installed in the main body of the cellular
phone 100. Alternatively, as shown in FIG. 10, the radio wave
detection module can be configured such that connection terminals,
such as the power terminal 14, the output terminal 16, and the ground
terminal 18, are installed in the constitutional part 150 of the
cellular phone, such as a battery 150a, earphone, microphone,
Bluetooth, memory stick, or the like, connected to the external line
connection terminal 130 of the cellular phone 100'. At this point,
although a radio wave detection module installed in the battery 150a is
shown in FIG. 10 as an example, the radio wave detection module can
be installed in other constitutional parts 150 of the cellular phone
to configure a variety of forms under the technical spirit of the
present invention.
[79] In such a cellular phone 100 and 100' according to a preferred
embodiment of the present invention, a program for performing a radio
wave detection function for detecting illegal radio devices using a
specific frequency is mounted, and the system micro-controller 50 for
performing functions of the cellular phone is basically installed.
Then, the radio wave detection module 100 described above is
connected to be supplied power from the battery of the cellular phone
100 and 100' and is in contact with the input and output ports of the
system micro-controller 50. The radio wave detection module is
installed so as to transmit a data value related to detection of an
illegal radio device to the system micro-controller 50.
[80] At this point, as described above, the radio wave detection
module 10 can be installed in the main body of the cellular phone 100
as shown in FIG. 9 or in a constitutional part 150 of the cellular
phone as shown in FIG. 10.
[81] As shown in FIG. 9, if the radio wave detection module 10 is
installed inside the cellular phone 100 to configure the cellular
phone 100, a chip socket 114 connected to the input and output ports
of the system micro-controller 50 is installed on the circuit board
110 of the cellular phone to be combined with the radio wave
detection module 10. Needless to say, as described above, such a chip
socket 114 is not limited to the main circuit board on which the
system micro-controller 50 is installed, nor the position is limited.
For example, recently, there is provided a technique for conveniently
attaching and detaching a chipset that has a specific function for
enhancing value-added functions through a cellular phone, and the
present invention can be implemented in such a form.
[82] In addition, as shown in FIG. 10, if the radio wave detection
module 10 is installed in the battery 150a, which is a constitutional
part 150 of a cellular phone, to configure the cellular phone 100',
the radio wave detection module 10 can be installed to be combined
with a mounting depression 114' formed on the battery circuit board
152 of the battery 150a and placed within the housing 160. At this
point, the connection terminals of the radio wave detection module
10, such as the power terminal 14, the output terminal 16, and the
ground terminal 18, are configured separately from the battery
terminal 154, and when they are contacted with the external line
connection terminal 130 of the main body of the cellular phone 100',
they are connected to the system micro-controller 50 to perform a
function for detecting illegal radio devices. Needless to say, such a
connection structure can be configured by applying a variety of
techniques in the art.
[83] In such a cellular phone 100 and 100' according to a preferred
embodiment of the
present invention, the radio wave detection module 10 is connected to
the system micro-controller 50 of the cellular phone 100 and 100',
and the radio wave detection module 10 transfers data values of a
digital form for radio signals of an illegal radio device to the
system micro-controller 50, and the system micro-controller 50
controls to output a detection signal for the illegal radio device to
outside of the cellular phone 100 and 100' through a display
apparatus, such as the display 62, the speaker 64, or the like.
[84] Such a cellular phone 100 and 100' having the radio wave
detection function for detecting illegal radio devices according to
the present invention performs the detection function, and the
detection function for detecting illegal radio devices can be
performed only by downloading an application program for outputting
the data value of a digital form inputted from the radio wave
detection module 10 to the display apparatus of the cellular phone
100 and 100'.
[85] As described above, although a radio wave detection method, a
radio wave detection module, and a mobile device having a radio wave
detection function using the method and the module have been
described referring to figures, but it is merely an example, and it
will be readily understood by those skilled in the art that various
adaptations and changes can be made thereto without departing from
the spirit and scope of the present invention defined by the appended
claims. Mode for the Invention
[86] In order to accomplish the above objects of the invention,
according to one aspect of the invention, there is provided a radio
wave detection method for detecting an illegal radio device that uses
a radio signal of a designated frequency band, the method comprising
the steps of: receiving a narrowband radio signal including a radio
signal of a frequency band used by the illegal radio device through a
single frequency antenna, and obtaining a direct current voltage
value for a specific frequency of the illegal radio device by
serially processing the received narrowband radio signal;
transmitting the obtained direct current voltage value to a
micro-controller through an analog-to-digital converter port of the
micro-controller, and outputting a data value of a digital form from
the micro-controller; and externally displaying existence of the
illegal radio device through a display apparatus using the outputted
data value of a digital form.
[87] In the radio wave detection method for detecting an illegal
radio device according to the present invention, the step of
obtaining a direct current voltage value for a specific frequency of
the illegal radio device comprises the steps of: extracting the radio
signal of the frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna, using a band pass filter; and extracting the specific
frequency of the illegal radio device through an
RF detector from the radio signal extracted through the band pass
filter, and converting the extracted frequency into the direct
current voltage value that is an electrical signal transmitted to the
analog-to-digital converter port of the micro-controller.
[88] In the radio wave detection method for detecting an illegal
radio device according to the present invention, the step of
externally displaying existence of the illegal radio device through a
display apparatus using the outputted data value of a digital form
comprises the steps of: transmitting the data value of a digital form
outputted from the micro-controller to a system micro-controller
through an input-output port (IO port) of the system
micro-controller; and externally displaying the data value of a
digital form through the display apparatus under a control of the
system micro-controller.
[89] According to another aspect of the invention, there is provided
a radio wave detection module for detecting an illegal radio device
that uses a radio signal of a designated frequency band, the module
comprising: a single frequency antenna selected from a group
comprising a loop antenna, a micro-strip antenna, and a chip antenna,
for receiving a narrowband radio signal including a radio signal of a
frequency band used by the illegal radio device; a radio signal
processing unit for obtaining a direct current voltage value for a
specific frequency of the illegal radio device by serially processing
the narrowband radio signal received from the single frequency
antenna; and a micro-controller for outputting the direct current
voltage value obtained from the radio signal processing unit as a
data value of a digital form.
[90] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are installed to be mounted on a circuit board of a device having a
function for detecting the illegal radio device.
[91] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are formed as a single chip.
[92] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are formed as a single chip mounted on a chip socket that is
installed on a circuit board of a device, which is provided with a
separate system micro-controller to have a function for detecting an
illegal radio device, to be contact with an IO port of the system
micro-controller, so that the data value of a digital form outputted
from the micro-controller is inputted into the system micro-controller.
[93] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the single frequency
antenna, the radio signal processing unit, and the micro-controller
are installed to be contact with an external line connection terminal
that is installed on a circuit board of a device, which is provided with a
separate system micro-controller to have a function for detecting an
illegal radio device, to be contact with an IO port of the system
micro-controller, so that the data value of a digital form outputted
from the micro-controller is inputted into the system micro-controller.
[94] In the radio wave detection module for detecting an illegal
radio device according to the present invention, the radio signal
processing unit comprises: a band pass filter for extracting the
radio signal of the frequency band used by the illegal radio device
from the narrowband radio signal received through the single
frequency antenna; and an RF detector for extracting the specific
frequency of the illegal radio device from the radio signal extracted
through the band pass filter, and converting the extracted frequency
into the direct current voltage value that is an electrical signal
transmitted to the analog-to-digital converter port of the micro-controller.
[95] According to another aspect of the invention, there is provided
a mobile device having a radio wave detection function for detecting
an illegal radio device that uses a radio signal of a designated
frequency band, the mobile device comprising: a system
micro-controller mounted with a program for performing the function
for detecting an illegal radio device that uses a radio signal of a
designated frequency band, for performing original functions of the
mobile device; and a radio wave detection module connected to the
system micro-controller to be supplied with power from a battery of
the mobile device, for transmitting a result of detecting the illegal
radio device to the system micro-controller, wherein the radio wave
detection module is provided with a single frequency antenna selected
from a group comprising a loop antenna, a micro- strip antenna, and a
chip antenna, for receiving a narrowband radio signal including a
radio signal of a frequency band used by the illegal radio device.
[96] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module comprises: a band pass filter for
extracting a radio signal of a frequency band used by the illegal
radio device from the narrowband radio signal received through the
single frequency antenna; and an RF detector for extracting the
specific frequency of the illegal radio device from the radio signal
extracted through the band pass filter, and converting the extracted
frequency into a direct current voltage value that is an electrical
signal transmitted to an analog-to-digital converter port of the
system microcontroller.
[97] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module comprises: a band pass filter for
extracting a radio signal of a frequency band used by the illegal
radio device from the narrowband radio signal received through the
single frequency antenna; and an RF detector for extracting the
specific frequency of the
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extract frequency into a direct
current voltage value; and a detection micro-controller for receiving
the direct current voltage value obtained by the RF detector through
an analog-to-digital converter port, converting the direct current
voltage value into a data value of a digital form through an internal
operation, and transmitting the data value of a digital form to the
system micro-controller through an IO port of the system micro-controller.
[98] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module is formed as a single chip installed
in a main body of the mobile device where the system micro-controller
is installed.
[99] The mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention
further comprises an external line connection terminal connected to
the system micro-controller, wherein the radio wave detection module
is installed in a constitutional part of the mobile device selected
among a group comprising a battery, earphone, microphone, Bluetooth,
and memory stick, and thus when the constitutional part of the mobile
device is connected to the external line connection terminal, the
radio wave detection module is connected to the system
micro-controller and performs the function for detecting an illegal
radio device.
[100] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the radio wave detection module is installed to be mounted on a
circuit board of the mobile device.
[101] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention,
the single frequency antenna of the radio wave detection module is
installed to be formed in a shape of a pattern on an inner surface of
a housing of the main body of the mobile device. Industrial Applicability
[102] According to a radio wave detection method and a radio wave
detection module for detecting illegal radio devices, since a
narrowband radio signal including a radio signal of a frequency band
used by an illegal radio device is received using single frequency
antennas and processed in serial, the illegal radio device can be
detected with excellent stability and high response and detection
efficiency compared with conventional techniques. Particularly, since
a direct current voltage for a specific frequency of the illegal
radio device is obtained through a serial process after receiving a
narrowband radio signal including a radio signal of a frequency band
used by the illegal radio device using single frequency antennas, a
problem of making a moblie device unstable due to noises or erroneous
signals inputted while processing the received signal can be
effectively removed, and thus response and detection efficiency for
the radio signal of the illegal radio device can be enhanced. In
addition, in implementing an apparatus for detecting illegal radio
devices, the present invention can be configured in a form of a
module utilizing active elements and passive elements, and the module
can be installed in a circuit board or configured as a single chip.
Therefore, since the configuration is simplified compared with
conventional techniques, the apparatus can be miniaturized, and a
function for detecting illegal radio devices can be easily applied to
a mobile device such as a cellular phone. In addition, since the
present invention can be configured to output a data value of a
digital form through the micro-controller (microcomputer) installed
in itself, a hardware configuration for detecting a radio signal of
an illegal radio device does not need to be additionally configured
in a mobile device such as a cellular phone, and thus the present
invention is highly compatible with a variety of mobile devices.
Particularly, since the radio wave detection module according to the
present invention can be configured as a single chip, a wave radio
detection function for detecting illegal radio devices can be applied
only by adding a configuration (a socket or an external line
connection terminal) for combining a radio wave detection circuit to
a desired mobile device such as a cellular phone, and thus burdens on
designing a desired device to which the present invention is applied
can be diminished. Furthermore, unlike conventional techniques, in
the present invention, since a module having a radio wave detection
function for detecting illegal radio devices can be added while
diminishing burdens on designing a module of a mobile device, an
illegal radio device can be detected stably and efficiently without
deteriorating original functions of the mobile device. Particularly,
since single frequency antennas are installed in addition to the
antenna of the mobile device and a detection micro-controller for
performing the radio wave detection function is configured in
addition to the system micro-controller, the radio wave detection
function is separated from the original functions of the mobile
device to stably and efficiently perform the detection function, and
the mobile device can smoothly perform its original functions. In
addition, since single frequency antennas are installed in addition
to the antenna of the mobile device, it is advantageous in that a
modification of design for installing the antennas is not required to
a mobile device that does not use an antenna, such as a calculator,
digital camera, PSP, and the like. Although the present invention has
been described with reference to several preferred embodiments, the
description is illustrative of the invention and is not to be
construed as limiting the invention. Various modifications and
variations may occur to those skilled in the art, without departing
from the scope of the invention as defined by the appended claims.
WO 2008066263 20080605 Claims
[1] A radio wave detection method for detecting an illegal radio
device that uses a radio signal of a designated frequency band, the
method comprising the steps of: receiving a narrowband radio signal
including a radio signal of a frequency band used by the illegal
radio device through a single frequency antenna, and obtaining a
direct current voltage value for a specific frequency of the illegal
radio device by serially processing the received narrowband radio
signal; transmitting the obtained direct current voltage value to a
micro-controller through an analog-to-digital converter port of the
micro-controller, and outputting a data value of a digital form from
the micro-controller; and externally displaying existence of the
illegal radio device through a display apparatus using the outputted
data value of a digital form.
[2] The method according to claim 1, wherein the step of obtaining a
direct current voltage value for a specific frequency of the illegal
radio device comprises the steps of: extracting the radio signal of
the frequency band used by the illegal radio device from the
narrowband radio signal received through the single frequency
antenna, using a band pass filter; and extracting the specific
frequency of the illegal radio device through an RF detector from the
radio signal extracted through the band pass filter, and converting
the extracted frequency into the direct current voltage value that is
an electrical signal transmitted to the analog-to-digital converter
port of the microcontroller.
[3] The method according to claim 1 or 2, wherein the step of
externally displaying existence of the illegal radio device through a
display apparatus using the outputted data value of a digital form
comprises the steps of: transmitting the data value of a digital form
outputted from the micro-controller to a system micro-controller
through an input-output port (IO port) of the system
micro-controller; and externally displaying the data value of a
digital form through the display apparatus under a control of the
system micro-controller.
[4] A radio wave detection module for detecting an illegal radio
device that uses a radio signal of a designated frequency band, the
module comprising: a single frequency antenna selected from a group
comprising a loop antenna, a micro-strip antenna, and a chip antenna,
for receiving a narrowband radio signal including a radio signal of a
frequency band used by the illegal radio device; a radio signal
processing unit for obtaining a direct current voltage value for a
specific frequency of the illegal radio device by serially processing
the narrowband radio signal received from the single frequency
antenna; and a micro-controller for outputting the direct current
voltage value obtained from the radio signal processing unit as a
data value of a digital form.
[5] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller
are installed to be mounted on a circuit board of a device having a
function for detecting the illegal radio device.
[6] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller
are formed as a single chip.
[7] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller
are formed as a single chip mounted on a chip socket that is
installed on a circuit board of a device, which is provided with a
separate system micro-controller to have a function for detecting an
illegal radio device, to be contact with an IO port of the system
microcontroller, so that the data value of a digital form outputted
from the microcontroller is inputted into the system micro-controller.
[8] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller
are installed to be contact with an external line connection terminal
that is installed on a circuit board of a device, which is provided
with a separate system micro-controller to have a function for
detecting an illegal radio device, to be contact with an IO port of
the system micro-controller, so that the data value of a digital form
outputted from the micro-controller is inputted into the system
micro-controller.
[9] The module according to any one of claims 4 to 8, wherein the
radio signal processing unit comprises: a band pass filter for
extracting the radio signal of the frequency band used by the illegal
radio device from the narrowband radio signal received through the
single frequency antenna; and an RF detector for extracting the
specific frequency of the illegal radio device from the radio signal
extracted through the band pass filter, and converting the extracted
frequency into the direct current voltage value that is an electrical
signal transmitted to the analog-to-digital converter port of the
micro-controller.
[10] A mobile device having a radio wave detection function for
detecting an illegal radio device that uses a radio signal of a
designated frequency band, the mobile device comprising: a system
micro-controller mounted with a program for performing the function
for detecting an illegal radio device that uses a radio signal of a designated
frequency band, for performing original functions of the mobile
device; and a radio wave detection module connected to the system
micro-controller to be supplied with power from a battery of the
mobile device, for transmitting a result of detecting the illegal
radio device to the system micro-controller, wherein the radio wave
detection module is provided with a single frequency antenna selected
from a group comprising a loop antenna, a micro-strip antenna, and a
chip antenna, for receiving a narrowband radio signal including a
radio signal of a frequency band used by the illegal radio device.
[11] The mobile device according to claim 10, wherein the radio wave
detection module comprises: a band pass filter for extracting a radio
signal of a frequency band used by the illegal radio device from the
narrowband radio signal received through the single frequency
antenna; and an RF detector for extracting the specific frequency of
the illegal radio device from the radio signal extracted through the
band pass filter, and converting the extracted frequency into a
direct current voltage value that is an electrical signal transmitted
to an analog-to-digital converter port of the system micro-controller.
[12] The mobile device according to claim 10, wherein the radio wave
detection module comprises: a band pass filter for extracting a radio
signal of a frequency band used by the illegal radio device from the
narrowband radio signal received through the single frequency
antenna; an RF detector for extracting the specific frequency of the
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extract frequency into a direct
current voltage value; and a detection micro-controller for receiving
the direct current voltage value obtained by the RF detector through
an analog-to-digital converter port, converting the direct current
voltage value into a data value of a digital form through an internal
operation, and transmitting the data value of a digital form to the
system micro-controller through an IO port of the system micro-controller.
[13] The mobile device according to claims 10 to 12, wherein the
radio wave detection module is formed as a single chip installed in a
main body of the mobile device where the system micro-controller is installed.
[14] The mobile device according to claims 10 to 12, further
comprising an external line connection terminal connected to the
system micro-controller, wherein the radio wave detection module is
installed in a constitutional part of the mobile device selected
among a group comprising a battery, earphone, microphone, Bluetooth,
and memory stick, and thus when the constitutional part of the mobile
device is connected to the external line connection terminal, the
radio wave detection module is connected to the system
micro-controller and performs the function for detecting an illegal
radio device. [15] The mobile device according to claims 10 to 12,
wherein the radio wave detection module is installed to be mounted on
a circuit board of the mobile device. [16] The mobile device
according to claims 10 to 12, wherein the single frequency antenna of
the radio wave detection module is installed to be formed in a shape
of a pattern on an inner surface of a housing of the main body of the
mobile device.
----------------------------------------------------------------------------------------------------
World Class, Professional, Ethical, and Competent Bug Sweeps, and
Wiretap Detection using Sophisticated Laboratory Grade Test Equipment.
----------------------------------------------------------------------------------------------------
James M. Atkinson Phone: (978) 546-3803
Granite Island Group Fax: (978) 546-9467
127 Eastern Avenue #291 Web:
http://www.tscm.com/
Gloucester, MA 01931-8008 E-mail: mailto:jm..._at_tscm.com
----------------------------------------------------------------------------------------------------
We perform bug sweeps like it's a full contact sport, we take no prisoners,
and we give no quarter. Our goal is to simply, and completely stop the spy.
----------------------------------------------------------------------------------------------------
--=====================_837667859==.ALT
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<body>
<a href=3D"
http://www.wipo.int/pctdb/en/wo.jsp?WO=3D2008066263&IA=3DKR2=
007005669&DISPLAY=3DSTATUS" eudora=3D"autourl">
http://www.wipo.int/pctdb/en/wo.jsp?WO=3D2008066263&IA=3DKR2007005669&a=
mp;DISPLAY=3DSTATUS</a>
<br><br>
<b>Pub. No.:</b> WO/2008/066263 <b>International
Application No.:</b> PCT/KR2007/005669<br>
<b>Publication Date:</b> 05.06.2008 <b>International Filing Date:</b>
12.11.2007<br>
<b>IPC:</b> <b><i>H04B 1/40</i></b> (2006.01)<br>
<b>Applicant:</b> <b>SON, Ho Won</b> [KR/KR]; 202-104 Kyung-Dong Apt.
Chungryong-Dong, Geunjung-gu, Busan 609-769 (KR).<br>
<b>Inventor:</b> <b>SON, Ho Won</b>; 202-104 Kyung-Dong Apt.
Chungryong-Dong, Geunjung-gu, Busan 609-769 (KR).<br>
<b>Agent:</b> <b>BAEG, Seung Jun</b>; 7F, Kyungnam Bldg., 56-4,
Jungang-dong, 4-ga, Jung-gu, Busan 600-815 (KR).<br>
<b>Priority Data:</b> <br>
10-2006-0118123 28.11.2006 KR<br>
10-2007-0044667 08.05.2007 KR<br>
<b>Title:</b> METHOD OF AND MODULE FOR DETECTING ELECTROMAGNETIC WAVES OF
ILLEGAL WIRELESS DEVICES, AND MOBILE DEVICE WITH ELECTROMAGNETIC WAVE
DETECTING FUNCTION USING THE SAME<br>
<b>Abstract:</b>
<a href=3D"
http://www.wipo.int/pctdb/images/PCT-IMAGES/05062008/KR200700566=
9_05062008_gz_en.x4-b.jpg">
<img src=3D"cid:7.0.1.0.2.20080811192528.1cc8b068_at_tscm.com.0" width=3D220 h=
eight=3D116 alt=3D"[]">
</a> <br>
The present invention provides a radio wave detection method and a radio
wave detection module for detecting illegal radio devices, and a mobile
device having a radio wave detection function using the method and the
module, for effectively detecting a radio signal transmitted from an
illegal radio device, such as an eavesdropping device, a monitoring
device, and a hidden camera used to violate privacy or leak information.
In the present invention, a narrowband radio signal including a radio
signal of a frequency band used by the illegal radio device is received
through a single frequency antenna, and a direct current voltage value
for a specific frequency of the illegal radio device is obtained by
serially processing the received narrowband radio signal. Then, the
obtained direct current voltage value is transmitted to a
micro-controller through an analog-to-digital converter port of the
micro-controller, and a data value of a digital form is outputted from
the micro-controller to externally display existence of the illegal radio
device through a display apparatus.<br><br>
<b>Designated States:</b> AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BH, BR,
BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG,
ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG,
KM, KN, KP, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN,
MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC,
SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ,
VC, VN, ZA, ZM, ZW.<br>
African Regional Intellectual Property Org. (ARIPO) (BW, GH, GM, KE, LS,
MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)<br>
Eurasian Patent Organization (EAPO) (AM, AZ, BY, KG, KZ, MD, RU, TJ,
TM)<br>
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI,
FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, PL, PT, RO, SE, SI,
SK, TR)<br>
African Intellectual Property Organization (OAPI) (BF, BJ, CF, CG, CI,
CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). <br>
<b>Publication Language:</b> English (EN) <br>
<b>Filing Language:</b> Korean (KO) <br><br>
<br><br>
Description<br><br>
METHOD OF AND MODULE FOR DETECTING ELECTROMAGNETIC WAVES OF ILLEGAL
WIRELESS DEVICES, AND MOBILE DEVICE WITH ELECTROMAGNETIC WAVE<br><br>
DETECTING FUNCTION USING THE SAME Technical Field<br><br>
[1] The present invention relates to a radio wave detection method and a
radio wave detection module for detecting illegal radio devices, and a
mobile device having a radio wave detection function using the method and
the module, and more specifically, to a radio wave detection method and a
radio wave detection module for detecting illegal radio devices, and a
mobile device having a radio wave detection function using the method and
the module, for effectively detecting a radio signal transmitted from an
illegal radio device, such as an eavesdropping device, a monitoring
device, or a hidden camera used to violate privacy or leak information.
Background Art<br><br>
[2] Recently, as eavesdropping devices, monitoring devices, and hidden
cameras are illegally used, privacy of an individual and human rights are
so frequently and seriously violated as to become a social
problem.<br><br>
[3] At this point, devices such as eavesdropping devices, monitoring
devices, and hidden cameras receive and transmit information in a radio
communication method by nature, and each country regulates the devices to
use a radio wave of a frequency band different from that of general
communication equipment. That is, eavesdropping devices and monitoring
devices distributed in the market do not use a plurality of unspecific
frequency bands as a frequency band. For example, Information and
Communication Department in Korea allocates four bands of 2410 MHz, 2430
MHz, 2450 MHz, and 2470 MHz as image transmission bands, which are called
as 'Specific low power radio station frequencies' for 'radio transmission
image devices' used as a hidden camera. Therefore, most of products using
the 'radio transmission image devices' distributed in Korea use
frequencies of the four bands. Here, since a unidirectional voice
transmission frequency is not allocated for wireless eavesdropping
devices among low power radio devices in Korea, the most actively
distributed products in Korea are Japanese radio transmitters. Then,
Japan regulates frequency bands of radio transmitters to 398.605 MHz,
399.455 MHz, and 399.030 MHz.<br><br>
[4] Accordingly, as a method for detecting an eavesdropping device,
monitoring device, and hidden camera using such a radio communication
method, a radio signal of <br><br>
a frequency band used by these devices is extracted from a broadband
radio signal to determine existence of the eavesdropping device,
monitoring device, or hidden camera.<br><br>
[5] "Hidden camera detection apparatus" of Korea Laid-open
Patent Gazette<br><br>
Publication No. 10-2001-0026373 proposes a technique for detecting hidden
cameras operating in the neighborhood, in which the hidden camera
detection apparatus comprises a detection unit for detecting external
signals, a signal amplification unit electrically connected to the
detection unit, for amplifying signals outputted from the detection unit,
an alarm unit for generating alarm sounds, and a control unit
electrically connected to the signal amplification unit and the alarm
unit, for controlling signals outputted from the signal amplification
unit to operate the alarm unit.<br><br>
[6] "Eavesdropping device/Hidden camera detection apparatus" of
Korea Patent<br><br>
Gazette Registration No. 10-0552116 proposes a technique for detecting
eavesdropping devices and hidden cameras of a variety of frequency bands,
in which a low band and a high band antenna for detecting low band and
high band RF signals from RF signals are used to detect and analyze
signals of a specific frequency by periodically sweeping signals from low
frequency of 1.7 MHz to high frequency of 3 GHz.<br><br>
[7] "Eavesdropping and monitoring device and Hidden camera
detector" of Korea<br><br>
Patent Gazette Registration No. 10-0340822 proposes a technique for
preventing erroneous operations caused by cellular phone signals, in
which the eavesdropping and monitoring device and hidden camera detector
comprises a high frequency input unit for receiving high frequency
signals generated by eavesdropping and monitoring devices or hidden
cameras through an antenna, and a tuning unit for tuning only those
signals having frequencies in the range of 80 to 700 MHz among the
signals received by the high frequency input unit, in which a precise
frequency selection unit for blocking signals in the range of 750 to 850
MHz generated by cellular phones among the frequencies tuned by the
tuning unit is installed in the high frequency input unit.<br><br>
[8] "Radio wave detector for detecting radio waves of hidden cameras
and eavesdropping devices" of Korea Utility Model Gazette
Registration No. 20-0262547 proposes a technique for obtaining stable
signals having very high amplification degree and amplification cut-off
frequency without loss of signal transfer by using a super- low noise
voltage amplifying field-effect transistor (GaSa MESFET), having a noise
figure below 0.7 dB at the frequency of 4 GHz with high input impedance,
in a high frequency receiving and amplification unit.<br><br>
[9] However, the conventional techniques do not provide a clear
determination criterion for detecting illegal radio devices, but only
provide theoretical techniques for receiving a broadband radio signal and
extracting a radio signal of a frequency band used by an illegal radio
device, or general techniques for detecting an illegal radio device using
a <br><br>
supersonic sensor or the like without regard to acquiring a radio signal.
At this point, since a conventional technique proposed to detect an
illegal radio device by receiving a radio signal receives a broadband
radio signal A as shown in FIG. 1, there is a problem in that it is
difficult to detect existence of an illegal radio device stably and
effectively. That is, according to the conventional technique, existence
of an illegal radio device is determined through a narrowband radio
signal B including a radio signal of a frequency band used by the illegal
radio device, and there is a problem in that such a narrowband radio
signal is overlapped with frequencies used by other devices, as well as
with a specific frequency of the illegal radio device, as shown in FIG.
1. For example, wireless eavesdropping devices and a trunked radio system
(TRS) use a frequency band of 400 MHz, cellular phones use a frequency
band of 800 MHz, cordless phones use a frequency band of 900 MHz, hidden
cameras, CCTVs, and the like use a frequency band of 2400 to 2470 MHz,
and wireless LAN and Blue tooth use a frequency band of 2427 to 24000
MHz, and thus a narrowband radio signal (conventionally, a technique for
detecting illegal radio devices extracts a frequency band corresponding
to "B" of FIG. 1 to determine existence of an illegal radio
device) includes radio signals (frequencies) of a variety of
devices.<br><br>
[10] Accordingly, according to conventional techniques, a criterion for
determining existence of an illegal radio device is not clear and
ineffective, and thus there is a problem in that the configuration of an
apparatus for accurately separating and processing a radio signal of a
frequency band used by an illegal radio device is so complex when the
apparatus is implemented that the apparatus cannot be easily
miniaturized. Then, noises or erroneous signals making the apparatus
unstable are inputted in the process of separating a narrowband radio
signal from a received broadband radio signal and processing the
separated narrowband radio signal, and thus there is a problem in that
response and detection efficiency for radio signals of illegal radio
devices is not so high.<br><br>
[11] On the other hand, as requests for detection of illegal radio
devices are increased, proposed is a variety of mobile devices applied
with a function for detecting illegal radio devices, such as an MP3
player, personal digital assistant (PDA), digital camera, Play Station
Portable (PSP), calculator, and the like. Particularly, in relation with
cellular phones that have settled down as necessities of life,
introducing such a technique is actively reviewed. For example, a
technique for combining a function for detecting illegal radio devices
with a cellular phone is proposed, in a method of adding a function for
detecting wireless eavesdropping devices and hidden cameras to a cellular
phone and in a method of miniaturizing an apparatus for detecting
wireless eavesdropping devices and hidden cameras to associated the
function with a cellular phone. <br><br>
[12] "Cellular phone embedded with apparatus for detecting
eavesdropping and monitoring device and hidden camera" of Korea
Laid-open Patent Gazette Publication No. 2001-0103469 proposes a cellular
phone capable of detecting eavesdropping and monitoring devices and
hidden cameras, in which a detector reception module for receiving air
frequencies of eavesdropping and monitoring devices and hidden cameras
and generating warning signals is added to a general cellular phone, and
a microprocessor, battery power, amplifier, and speaker of the cellular
phone of its own are shared as a warning means. The cellular phone also
comprises a mode selector switch for separating or connecting the
detector reception module depending on an operation mode, and an external
switch for arbitrarily blocking battery power supplied to the detector
reception module.<br><br>
[13] "Cellular phone having a function for detecting hidden cameras
and eavesdropping devices" of Korea Patent Gazette Publication No.
2002-0016703 proposes a technique for splitting a signal received through
the antenna of a cellular phone into a signal of a frequency band of the
cellular phone and a signal of a frequency band of hidden cameras and
eavesdropping devices, receiving and detecting the signal of a frequency
band of hidden cameras and eavesdropping devices, detecting intensity of
an outputted signal, and determining installation of a hidden camera or
an eavesdropping device based on the detected signal intensity.<br><br>
[14] "Apparatus for detecting eavesdropping devices and hidden
cameras using mobile communication terminal" of Korea Patent Gazette
Publication No. 10-2006-0012938 proposes a technique for detachably
connecting a detection module for detecting eavesdropping devices and
hidden cameras to a mobile communication terminal so that the detection
module can be used whenever desired.<br><br>
[15] However, such conventional techniques related to a cellular phone
providing a function for detecting illegal radio devices apply a method
of receiving a broadband radio signal and separating a narrowband radio
signal to determine existence of an illegal radio device in the same
manner as other conventional techniques, and thus have the same problems.
In addition, a detection module is configured in order to apply a
function for detecting illegal radio devices to a cellular phone.
However, as described above, an apparatus for accurately separating and
processing a radio signal of a frequency band used by an illegal radio
device is difficult to implement, and thus the apparatus is difficult to
be practically applied to a small and thin cellular phone. For example, a
system micro-controller (referring to a microcomputer used for general
system control, such as an MPU or a CPU) is applied to a cellular phone
in order to implement a variety of functions of the cellular phone, and
such a system microcontroller has a limited number of analog-to-digital
converter ports (ADC ports) compared with the number of input-output
ports (IO ports) and has a limitation in <br><br>
applying elements, which need to be installed to perform a detection
function for detecting illegal radio devices, due to a circuit board
having a limited space and structure, and thus there is a problem in that
capacity of the system micro-controller needs to be enhanced.
Furthermore, since a cellular phone according to such a conventional
technique receives a radio signal of an illegal radio device through an
antenna installed for performing communication functions, noises or
erroneous signals are inputted even while transmission and receiving
signals for communication are processed, and thus there is a problem in
that original functions of the cellular phone, including communication
functions, are degraded. Therefore, there is a problem in that when the
original functions of the cellular are used, particularly, when the
original functions of the cellular are used in a communication that
practically needs a detection function for detecting illegal radio
devices, the detection function for detecting illegal radio devices
cannot be used. Disclosure of Invention Technical Problem<br><br>
[16] Accordingly, the present invention has been made in order to solve
the above problems, and it is an object of the invention to provide a
radio wave detection method and a radio wave detection module of a new
form for detecting illegal radio devices, in which existence of an
illegal radio device can be stably and effectively detected compared with
a conventional technique.<br><br>
[17] Another object of the invention is to provide a radio wave detection
method and a radio wave detection module of a new form for detecting
illegal radio devices, in which a problem of making a device unstable due
to noises or erroneous signals inputted while processing a received
signal can be effectively removed, thereby enhancing response and
detection efficiency for a radio signal of an illegal radio
device.<br><br>
[18] A further object of the invention is to provide a radio wave
detection method and a radio wave detection module of a new form for
detecting illegal radio devices, in which since the configuration is
simplified compared with a conventional technique in implementing an
apparatus for detecting the illegal radio devices, the apparatus can be
miniaturized, and a function for detecting the illegal radio devices can
be easily applied to a mobile device such as a cellular phone.<br><br>
[19] A further object of the invention is to provide a radio wave
detection method and a radio wave detection module of a new form for
detecting illegal radio devices, in which since the module for
determining existence of an illegal radio device is particularly
constructed as an one chip, a function for detecting illegal radio
devices can be easily implemented in a mobile device, such as a cellular
phone, a digital camera, <br><br>
PDA, and the like.<br><br>
[20] A further object of the invention is to provide a mobile device of a
new form having a radio wave detection function for detecting illegal
radio devices, to which the radio wave detection method and the radio
wave detection module are applied, so that an illegal radio device can be
efficiently detected without deteriorating original functions of the
mobile device, unlike a conventional technique. Technical
Solution<br><br>
[21] In order to accomplish the above objects of the invention, according
to one aspect of the invention, there is provided a radio wave detection
method for detecting an illegal radio device that uses a radio signal of
a designated frequency band, the method comprising the steps of:
receiving a narrowband radio signal including a radio signal of a
frequency band used by the illegal radio device through a single
frequency antenna, and obtaining a direct current voltage value for a
specific frequency of the illegal radio device by serially processing the
received narrowband radio signal; transmitting the obtained direct
current voltage value to a micro-controller through an analog-to-digital
converter port of the micro-controller, and outputting a data value of a
digital form from the micro-controller; and externally displaying
existence of the illegal radio device through a display apparatus using
the outputted data value of a digital form.<br><br>
[22] In the radio wave detection method for detecting an illegal radio
device according to the present invention, the step of obtaining a direct
current voltage value for a specific frequency of the illegal radio
device comprises the steps of: extracting the radio signal of the
frequency band used by the illegal radio device from the narrowband radio
signal received through the single frequency antenna, using a band pass
filter; and extracting the specific frequency of the illegal radio device
through an RF detector from the radio signal extracted through the band
pass filter, and converting the extracted frequency into the direct
current voltage value that is an electrical signal transmitted to the
analog-to-digital converter port of the micro-controller.<br><br>
[23] In the radio wave detection method for detecting an illegal radio
device according to the present invention, the step of externally
displaying existence of the illegal radio device through a display
apparatus using the outputted data value of a digital form comprises the
steps of: transmitting the data value of a digital form outputted from
the micro-controller to a system micro-controller through an input-output
port (IO port) of the system micro-controller; and externally displaying
the data value of a digital form through the display apparatus under a
control of the system micro-controller.<br><br>
[24] According to another aspect of the invention, there is provided a
radio wave detection module for detecting an illegal radio device that
uses a radio signal of a designated frequency band, the module
comprising: a single frequency antenna <br><br>
selected from a group comprising a loop antenna, a micro-strip antenna,
and a chip antenna, for receiving a narrowband radio signal including a
radio signal of a frequency band used by the illegal radio device; a
radio signal processing unit for obtaining a direct current voltage value
for a specific frequency of the illegal radio device by serially
processing the narrowband radio signal received from the single frequency
antenna; and a micro-controller for outputting the direct current voltage
value obtained from the radio signal processing unit as a data value of a
digital form.<br><br>
[25] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are installed
to be mounted on a circuit board of a device having a function for
detecting the illegal radio device.<br><br>
[26] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are formed as
a single chip.<br><br>
[27] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are formed as
a single chip mounted on a chip socket that is installed on a circuit
board of a device, which is provided with a separate system
micro-controller to have a function for detecting an illegal radio
device, to be contact with an IO port of the system micro-controller, so
that the data value of a digital form outputted from the micro-controller
is inputted into the system micro-controller.<br><br>
[28] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the radio signal processing
unit comprises: a band pass filter for extracting the radio signal of the
frequency band used by the illegal radio device from the narrowband radio
signal received through the single frequency antenna; and an RF detector
for extracting the specific frequency of the illegal radio device from
the radio signal extracted through the band pass filter, and converting
the extracted frequency into the direct current voltage value that is an
electrical signal transmitted to the analog-to-digital converter port of
the micro-controller.<br><br>
[29] According to another aspect of the invention, there is provided a
mobile device having a radio wave detection function for detecting an
illegal radio device that uses a radio signal of a designated frequency
band, the mobile device comprising: a system micro-controller mounted
with a program for performing the function for detecting an illegal radio
device that uses a radio signal of a designated frequency band, for
performing original functions of the mobile device; and a radio wave
detection module connected to the system micro-controller to be supplied
with power from a battery of the mobile device, for transmitting a result
of detecting the illegal radio device to the system micro-controller,
wherein the radio wave detection module is provided with a <br><br>
single frequency antenna selected from a group comprising a loop antenna,
a micro- strip antenna, and a chip antenna, for receiving a narrowband
radio signal including a radio signal of a frequency band used by the
illegal radio device.<br><br>
[30] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module comprises: a band pass filter for extracting
a radio signal of a frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna; and an RF detector for extracting the specific frequency of the
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extracted frequency into a direct current
voltage value that is an electrical signal transmitted to an
analog-to-digital converter port of the system microcontroller.<br><br>
[31] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module comprises: a band pass filter for extracting
a radio signal of a frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna; and an RF detector for extracting the specific frequency of the
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extract frequency into a direct current
voltage value; and a detection micro-controller for receiving the direct
current voltage value obtained by the RF detector through an
analog-to-digital converter port, converting the direct current voltage
value into a data value of a digital form through an internal operation,
and transmitting the data value of a digital form to the system
micro-controller through an IO port of the system
micro-controller.<br><br>
[32] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module is formed as a single chip installed in a
main body of the mobile device where the system micro-controller is
installed.<br><br>
[33] The mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention
further comprises an external line connection terminal connected to the
system micro-controller, wherein the radio wave detection module is
installed in a constitutional part of the mobile device selected among a
group comprising a battery, earphone, microphone, Bluetooth, and memory
stick, and thus when the constitutional part of the mobile device is
connected to the external line connection terminal, the radio wave
detection module is connected to the system micro-controller and performs
the function for detecting an illegal radio device.<br><br>
[34] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module is <br><br>
installed to be mounted on a circuit board of the mobile device.<br><br>
[35] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
single frequency antenna of the radio wave detection module is installed
to be formed in a shape of a pattern on an inner surface of a housing of
the main body of the mobile device.<br><br>
Advantageous Effects<br><br>
[36] According to a radio wave detection method and a radio wave
detection module for detecting illegal radio devices, since a narrowband
radio signal including a radio signal of a frequency band used by an
illegal radio device is received using single frequency antennas and
processed in serial, the illegal radio device can be detected with
excellent stability and high response and detection efficiency compared
with conventional techniques. Particularly, since a direct current
voltage for a specific frequency of the illegal radio device is obtained
through a serial process after receiving a narrowband radio signal
including a radio signal of a frequency band used by the illegal radio
device using single frequency antennas, a problem of making a mobile
device unstable due to noises or erroneous signals inputted while
processing the received signal can be effectively removed, and thus
response and detection efficiency for the radio signal of the illegal
radio device can be enhanced. In addition, in implementing an apparatus
for detecting illegal radio devices, the present invention can be
configured in a form of a module utilizing active elements and passive
elements, and the module can be installed in a circuit board or
configured as a single chip. Therefore, since the configuration is
simplified compared with conventional techniques, the apparatus can be
miniaturized, and a function for detecting illegal radio devices can be
easily applied to a mobile device such as a cellular phone. In addition,
since the present invention can be configured to output a data value of a
digital form through the micro-controller (microcomputer) installed in
itself, a hardware configuration for detecting a radio signal of an
illegal radio device does not need to be additionally configured in a
mobile device such as a cellular phone, and thus the present invention is
highly compatible with a variety of mobile devices. Particularly, since
the radio wave detection module according to the present invention can be
configured as a single chip, a wave radio detection function for
detecting illegal radio devices can be applied only by adding a
configuration (a socket or an external line connection terminal) for
combining a radio wave detection circuit to a desired mobile device such
as a cellular phone, and thus burdens on designing a desired device to
which the present invention is applied can be diminished. Furthermore,
unlike conventional techniques, in the present invention, since a module
having a radio wave detection function for detecting illegal radio
devices can be added while diminishing burdens on designing a module of a
mobile <br><br>
device, an illegal radio device can be detected stably and efficiently
without deteriorating original functions of the mobile device.
Particularly, since single frequency antennas are installed in addition
to the antenna of the mobile device and a detection micro-controller for
performing the radio wave detection function is configured in addition to
the system micro-controller, the radio wave detection function is
separated from the original functions of the mobile device to stably and
efficiently perform the detection function, and the mobile device can
smoothly perform its original functions. In addition, since single
frequency antennas are installed in addition to the antenna of the mobile
device, it is advantageous in that a modification of design for
installing the antennas is not required to a mobile device that does not
use an antenna, such as a calculator, digital camera, PSP, and the like.
Brief Description of the Drawings<br><br>
[37] Further objects and advantages of the invention can be more fully
understood from the following detailed description taken in conjunction
with the accompanying drawings in which:<br><br>
[38] FIG. 1 is a graph illustrating background techniques and problems of
conventional techniques;<br><br>
[39] FIG. 2 is a view illustrating a radio wave detection method for
detecting illegal radio devices according to the technical spirit of the
present invention;<br><br>
[40] FIG. 3 is a graph illustrating an example of a radio wave detection
method for detecting illegal radio devices according to a preferred
embodiment of the present invention;<br><br>
[41] FIG. 4 is a view showing a radio wave detection module for detecting
illegal radio devices according to the technical spirit of the present
invention;<br><br>
[42] FIG. 5 is a block diagram illustrating a radio wave detection module
for detecting illegal radio devices according to a preferred embodiment
of the present invention;<br><br>
[43] FIG. 6 is a view illustrating an example of implementing the radio
wave detection circuit for detecting illegal radio devices shown in FIG.
5;<br><br>
[44] FIG. 7 is a view illustrating another example of implementing the
radio wave detection circuit for detecting illegal radio devices shown in
FIG. 5;<br><br>
[45] FIG. 8 is a block diagram illustrating a mobile device having a
radio wave detection function for detecting illegal radio devices
according to a preferred embodiment of the present invention;<br><br>
[46] FIG. 9 is a view illustrating an example of implementing a cellular
phone as an example of a mobile device having a radio wave detection
function for detecting illegal radio devices shown in FIG. 6;
and<br><br>
[47] FIG. 10 is a view illustrating another example of implementing a
cellular phone as <br><br>
an example of a mobile device having a radio wave detection function for
detecting illegal radio devices shown in FIG. 6. [48]<br><br>
Best Mode for Carrying Out the Invention<br><br>
[49] Hereinafter, the preferred embodiments of the present invention will
be described in detail with reference to FIGS. 2 to 10 of the
accompanying drawings. Furthermore, in FIGS. 2 to 10 of the drawings
illustrating the embodiments of the invention, elements having like
functions will be denoted by like reference numerals and details thereon
will not be repeated.<br><br>
[50] FIG. 2 is a view illustrating a radio wave detection method for
detecting illegal radio devices according to the technical spirit of the
present invention, FIG. 3 is a graph illustrating an example of a radio
wave detection method for detecting illegal radio devices according to a
preferred embodiment of the present invention, and FIG. 4 is a view
showing a radio wave detection module for detecting illegal radio devices
according to the technical spirit of the present invention.<br><br>
[51] Referring to FIGS. 1 to 4, an object of the present invention is to
detect illegal radio devices, such as an eavesdropping device, a
monitoring device, or a hidden camera, that is maliciously used to
violate privacy or leak information using a radio signal of a designated
frequency band (hereinafter, referred to as an illegal radio device), and
there is provided a radio wave detection method for detecting illegal
radio devices and a radio wave detection module comprising constitutional
elements for implementing the method.<br><br>
[52] The radio wave detection method for detecting illegal radio devices
according to the present invention receives a narrowband radio signal,
processes the narrowband radio signal in serial (continuously processes
the narrowband radio signal in a row through a radio signal processing
unit 30 comprising a band pass filter 32 and an RF detector 34), obtains
a direct current voltage value for a radio signal of a specific
frequency, outputs the obtained direct current voltage value as a data
value of a digital form, and displays the data value of a digital form
outside through a display apparatus 60 (i.e., a display 62, a speaker 64,
or a light emitting diode LED shown in FIG. 8), which is processed by a
radio wave detection circuit 10 where these steps are configured as a
module. At this point, if a micro-controller 40 for outputting the direct
current voltage value for a radio signal of a specific frequency as a
data value of a digital form is used as a microcontroller of equipment
dedicated for detecting illegal radio devices or of a mobile device of
its own, the display apparatus 60 is controlled by the micro-controller
40, whereas if the radio wave detection module of the present invention
formed to be easily installed in a mobile device is configured as a
single chip or an independent <br><br>
module, the display apparatus 60 is controlled by a system
micro-controller 50 (e.g., a system micro-controller 50 of a cellular
phone 100 in the present invention) of the mobile device to externally
display the data value of a digital form.<br><br>
[53] Describing in detail referring to FIGS. 1 to 4, a narrowband radio
signal including a radio signal of a frequency band used by an illegal
radio device is received through a single frequency antenna 20.
Accordingly, compared with a conventional method of receiving an
unspecific radio signal (a broadband radio signal) using an antenna
having a reception rate of a plurality of comparatively wide frequency
bands, the radio wave detection method is a method of receiving a radio
signal of a frequency band used by an illegal radio device. Therefore, a
specific radio signal is selectively received and simply processed, and
thus a compact radio wave detection circuit can be configured.<br><br>
[54] The narrowband radio signal received as such is serially processed,
and a direct current voltage value for the specific frequency band of the
illegal radio device is obtained. At this point, the direct current
voltage value is obtained by extracting a radio signal of a frequency
band used by the illegal radio device through the band pass filter 32,
extracting a specific frequency of the illegal radio device through the
RF detector 34, and converting the radio signal of the extracted specific
frequency into the direct current voltage value. That is, the direct
current voltage value for a specific frequency of an illegal radio device
is obtained through the steps of extracting a radio signal of a frequency
band used by the illegal radio device from the narrowband radio signal
received through the single frequency antenna 20 through the band pass
filter 32, extracting a specific frequency of an illegal radio device
through the RF detector, and converting the radio signal of the extracted
specific frequency into the direct current voltage value, which is an
electrical signal transmitted to an analog-to-digital port of the
micro-controller 40.<br><br>
[55] The direct current voltage value for a specific frequency of an
illegal radio device obtained as such is outputted as a data value of a
digital form through the microcontroller 40. That is, the
micro-controller 40 outputs the voltage (direct current voltage value)
flowing into the ADC port through the RF detector 34 as a code of a
digital form through an operation process set in the micro-controller. At
this point, the method of outputting the direct current voltage value as
a data value of a digital form using the micro-controller 40 of the
present invention can be easily applied to the mobile device 100 such as
a cellular phone 100 and 100' (refer to FIGS. 9 and 10) that will be
described below, particularly if the method is implemented in a single
chip. That is, according to a conventional technique, when a separate
apparatus having a radio wave detection function (generally, a detector)
is implemented, or the radio wave detection function is added to a mobile
device such as a cellular phone, they should be designed using the ADC
port of the micro-controller (corresponding to the system <br><br>
micro-controller 50 of the present invention) of the mobile device 100.
Therefore, the ADC port should be reflected from the initial design of
the cellular phone, and the radio wave detection function for detecting
illegal radio devices should be additionally reflected when an operation
program of the cellular phone is created. Contrarily, according to the
present invention, since the micro-controller 40 outputs a code of a
digital form and uses an VO port of the system micro-controller 50 of the
mobile device 100, the radio wave detection function for detecting
illegal radio devices can be applied to the mobile device 100, such as
the cellular phone 100 and 100', only through software upgrade (a general
method of installing and using a program in a cellular phone), without a
need of additional hardware configuration (needless to say, a chip socket
114 (refer to FIG. 9) combined and connected to the radio wave detection
module 10 according to the present invention or an external line
connection terminal 130 (refer to FIG. 10) needs to be configured).
Needless to say, the radio wave detection module that implements the
radio wave detection function for detecting illegal radio devices of the
present invention described above is implemented to be installed on a
circuit board in the form of an active element or a passive element, and
a micro-controller (referred to as a system micro-controller 50 in the
present invention) installed for performing original functions of a
general mobile device can be used as the micro-controller 40 for
outputting the code of a digital form.<br><br>
[56] As described above, in the radio wave detection method for detecting
illegal radio devices according to the present invention, the step of
receiving a narrowband radio signal including a radio signal of a
frequency band used by an illegal radio device and obtaining a direct
current voltage value for a specific frequency of the illegal radio
device, and the step of outputting a data value of a digital form are
performed by the radio wave detection circuit 10 comprising the single
frequency antenna 20, the radio signal processing unit 30, and the
detection micro-controller 40, and existence of an illegal radio device
is externally displayed through the display apparatus 60 using the data
value of a digital form. Here, an LED or LCD display, a buzzer, a
speaker, or the like can be applied as the display apparatus 60, and if a
device dedicated for detecting illegal radio devices (detector) or the
system micro-controller 50 is used as the microcontroller 40 for
outputting the data value of a digital form, the data value is
transmitted under the direct control of the micro-controller 40. Then, in
the case of the mobile device 100, such as a cellular phone, additionally
provided with the radio wave detection function for detecting illegal
radio devices, the data value of a digital form is outputted to the I/O
port of the system micro-controller 50 (e.g., a system microcontroller of
a cellular phone) installed outside of the radio wave detection circuit
10 configured as a module, and the data value of a digital form is
externally displayed through a display apparatus (as shown in FIG. 9, the
display 62 or the speaker 64 of the <br><br>
cellular phone 100) under the control of the system micro-controller
50.<br><br>
[57] Referring to FIG. 4, the radio wave detection module 10 for
detecting illegal radio devices according to the present invention
comprises a single frequency antenna 20, a radio signal processing unit
30, and a micro-controller 40 in order to implement the radio wave
detection method for detecting illegal radio devices as describe above,
and outputs a result of determining existence of an illegal radio device
as a data value of a digital form with respect to a specific
frequency.<br><br>
[58] Describing in further detail, the single frequency antenna 20 can be
configured selectively using a loop antenna, a micro strip antenna, a
chip antenna, or the like in order to receive a narrowband radio signal
including a radio signal of a frequency band used by an illegal radio
device. Such a single frequency antenna 20 is configured to receive radio
signals limited to a radio signal of a specific band including a radio
signal of a frequency band used by the illegal radio device, unlike a
general antenna that receives an unspecific radio signal or a radio
signal of a wide range. The radio signal processing unit 30 processes the
narrowband radio signal received from the single frequency antenna 20 in
serial and obtains a direct current voltage value for a specific
frequency of the illegal radio device. In the present invention, such a
radio signal processing unit 30 comprises a band pass filter 32 and an RF
detector 34. Here, the band pass filter 32 extracts a radio signal of a
frequency band used by the illegal radio device from the narrowband radio
signal received from the single frequency antenna 20, and the RF detector
34 extracts a specific frequency of the illegal radio device from the
radio signal extracted through the band pass filter 32 and converts the
radio signal of the extracted frequency into a direct current voltage
value, which is an electrical signal transmitted to the analog-to-digital
converter port of the micro-controller 40.<br><br>
[59] As described above, the radio wave detection module 10 of the
present invention is provided with the micro-controller 40 for outputting
the direct current voltage value for a specific frequency of the illegal
radio device obtained by the radio signal processing unit 30 as a data
value of a digital form, and obtains a data value that is a result of
finally determining existence of an illegal radio device. Accordingly, in
the present invention, since a specific radio signal is selectively
received and the signal is promptly processed through a simply configured
circuit, a high response and detection efficiency for an illegal radio
device is secured together with stability. Furthermore, constitutional
elements for detecting illegal radio devices can be super-miniaturized,
and thus they can be easily embedded in a mobile device such as a
cellular phone.<br><br>
[60] Here, illegal radio devices detected by the present invention
include a wireless eavesdropping device, a wireless monitoring device, a
hidden camera, and the like, and the present invention is configure to
detect only one illegal radio device selected among the above illegal
radio devices (such a selection can be controlled by software, <br><br>
or automatically controlled through a serial communication between the
detection micro-controller(processor) 40 and the system
micro-controller(processor) 50. Alternatively, as shown in FIGS. 5 and 8,
a plurality of single frequency antennas 20a, 20b, and 20c, band pass
filters 32a, 32b, and 32c, and RF detectors 34a, 34b, and 34c are
installed, and two or more of the single frequency antennas, band pass
filters, and RF detectors selected among them (in software)
simultaneously detect two or more illegal radio devices. Needless to say,
as described above, according to the present invention, if the radio wave
detection module 10 is configured as a single chip, the configuration can
be simply modified when needed by replacing the radio wave detection
module and upgrading software. For example, when a cellular phone,
mounted with the radio wave detection module for detecting illegal radio
devices, used in Korea is to be used in Japan, it is possible to replace
the radio wave detection module with a radio wave detection module
designed to detect an illegal radio device of a specific frequency
applied in Japan.<br><br>
[61] FIG. 5 is a block diagram illustrating a radio wave detection module
for detecting illegal radio devices according to a preferred embodiment
of the present invention.<br><br>
[62] Referring to FIG. 5, the radio wave detection module 10 for
detecting illegal radio devices according to a preferred embodiment of
the present invention uses three single frequency antennas 20 for
receiving a radio signal of a specific frequency band used by an illegal
radio device respectively, i.e. a first single frequency antenna 20a, a
second single frequency antenna 20b, and a third single frequency antenna
20c. A receive narrowband radio signal is serially processed by the radio
signal processing unit 30 and outputted as a data value of a digital form
through the detection micro-controller 40, and thus constitutional
elements are miniaturized with high stability. That is, since a
conventional radio wave detection apparatus for detecting illegal radio
devices receives an unspecific radio signal through an antenna and
removes the unspecific signal through an internal circuit of the radio
wave detection apparatus, noises or erroneous signals are frequently
inputted in the process of correctly separating and processing a radio
signal of a specific frequency band transmitted by an illegal radio
device, and therefore, the apparatus is unstable, and the response and
detection efficiency for the radio signal of the illegal radio device is
not so high. Contrarily, in the present invention, as described above,
since a radio signal limited to a specific frequency used by an illegal
radio device is received from the step of receiving the radio signal, the
problem of noises or erroneous signals inputted while processing the
signal is minimized, and thus excellent stability and high response and
detection efficiency can be obtained. Particularly, since the single
frequency antenna 20 for receiving a radio signal of an illegal radio
device is installed in addition to a (communication) dedicated antenna,
such as an antenna of a cellular phone, the problem of noises or
erroneous <br><br>
signals inputted while processing the signal can be removed compared with
conventional techniques, and the radio wave detection function for
detecting illegal radio devices can be quite easily installed in a mobile
device that does not have a dedicated antenna, such as a digital
camera.<br><br>
[63] At this point, as it is noted, the illegal radio devices include a
wireless eavesdropping device, a wireless monitoring device, a hidden
camera, and the like, and generally, the wireless eavesdropping device,
wireless monitoring device, and hidden camera do not use a unspecific
many frequency band as a frequency band. That is, in Korea, the frequency
band of a radio transmission image device used as a hidden camera is
limited to four bands of 2410 MHz, 2430 MHz, 2450 MHz, and 2470 MHz for
image transmission, which is called as a frequency for specific low power
radio station , and thus radio transmission image devices in Korea use
frequencies of the four bands. Then, in Japan, the frequency band of a
radio transmission image device is limited to 1200 MHz. Accordingly, the
second and third single frequency antennas 20b and 20c that respectively
receive a radio signal of frequency bands of 1.2 GHz and 2.4 GHz are used
to detect a hidden camera. At this point, since the frequency band of a
radio transmitter is limited to 400 MHz in Japan, the first single
frequency antenna 20a that receives a radio signal of a frequency band
around 400 MHz is used to detect a wireless eavesdropping
device.<br><br>
[64] On the other hand, the radio wave detection module 10 according to a
preferred embodiment of the present invention applies the first single
frequency antenna 20a, the second single frequency antenna 20b, and the
third single frequency antenna 20c that respectively receive a radio
signal of frequency bands around 400 MHz, 1.2 GHz, and 2.4 GHz in order
to have a function for detecting both of the wireless eavesdropping
device and the wireless monitoring device. Particularly, the first single
frequency antenna 20a, as shown in FIGS. 6 and 7, applies a loop antenna
for receiving a radio signal including 400 MHz to detect a wireless
eavesdropping device that uses a frequency band around 400 MHz, and the
second and third single frequency antennas 20b and 20c apply a micro
strip antenna or a chip antenna for receiving a radio signal of a
frequency band of 1.2 GHz to detect a hidden camera that uses a frequency
band around 1.2 GHz and 2.4 GHz , which is higher than that of the first
single frequency antenna 20a. Needless to say, although all of the first,
second, and third single frequency antennas 20a, 20b, and 20c for a
receiving radio signal of frequency bands of 400 MHz, 1.2 GHz, and 2.4
GHz are applied in the preferred embodiment of the present invention, the
number and types of such single frequency antennas can be changed as
needed. Furthermore, although the first, second, and third single
frequency antennas 20a, 20b, and 20c are basically installed as a pattern
or an element on a circuit board where the radio wave detection module
are configured, they can be applied on <br><br>
the inner surface of the housing of a mobile device considering the trend
of miniaturizing mobile devices such as a cellular phone (The first,
second, and third single frequency antennas can be configured on the
inner surface 122 of the housing 120 configuring the case of the body of
the cellular phone 100 as shown in FIG. 9. Such a pattern can be
generally configured in the process of forming a shield on the inner
surface of a housing 120, and such a manufacturing process is a technique
well- known in the art. Since such a pattern can be easily configured
with the technique, detailed description thereof will be
omitted).<br><br>
[65] The radio signals received through the first, second, and third
single frequency antennas 20a, 20b, and 20c are serially processed
through the radio signal processing unit 30 comprising the band pass
filter 32 and the RF detector 34, and a direct current voltage value is
obtained for a specific frequency band of an illegal radio device. That
is, although the radio signal received through the single frequency
antenna 20 is a narrowband radio signal having a certain range from the
specific frequency used by the illegal radio device compared with a
signal received through a general antenna, since the radio signal
received through the single frequency antenna is always mixed with noises
due to a characteristic of a radio wave signal, the band pass filter 32
for passing through a radio signal of a frequency band (400 MHz, 1.2 GHz,
and 2.4 GHz in the present embodiment) used by the illegal radio device
is applied to filter unnecessary noises through the band pass filter 32.
Then, the radio signal outputted from the band pass filter 32 is received
through the RF detector 34, and a specific frequency of the illegal radio
device is extracted and converted into a direct current voltage value,
which is a signal inputted into the ADC port of the detection
micro-controller 40. According to a preferred embodiment of the present
invention, the band pass filter 32 of the radio signal processing unit 30
comprises a first band pass filter 32a, a second band pass filter 32b,
and a third band pass filter 32c respectively corresponding to and
connected to the first single frequency antenna 20a, the second single
frequency antenna 20b, and the third single frequency antenna 20c
described above, and the RF detector 34 comprises a first RF detector
34a, a second RF detector 34b, and a third RF detector 34c successively
connected to the first band pass filter 32a, the second band pass filter
32b, and the third band pass filter 32c in order to serially process the
radio signal in association with the band pass filter 32.<br><br>
[66] On the other hand, in the present embodiment, the detection
micro-controller 40 outputs the direct current voltage values applied
from the first, second, and third RF detectors 34a, 34b, and 34c through
the ADC port as codes (data value) of a digital form through a
predetermined operation process, and the outputted codes are transmitted
to the system micro-controller 50 of a mobile device to which the present
invention is applied, such as a cellular phone. Needless to say, if a
detector dedicated <br><br>
for detecting illegal radio devices is used, or the system
micro-controller 50 is used as the detection micro-controller 40, the
detection micro-controller 40 can directly control a display, LED,
buzzer, and the like to externally display the data values. As described
above, since a radio signal of an analog form is outputted as a data
value of a digital form, the radio wave detection module 10 according to
the present invention can be very easily applied to a mobile device such
as a cellular phone. That is, according to the present invention, if a
data value is outputted, an illegal radio device exists in the
neighborhood of a place where radio waves of illegal radio devices are
detected, whereas if a data value is not outputted, an illegal radio
device does not exist in the neighborhood of a place where radio waves of
illegal radio devices are detected. In addition, it is assumed that if
magnitude of the outputted signal is gradually increased as the location
is moved from the place where radio waves of illegal radio devices are
detected, the illegal radio device is getting closer, whereas if
magnitude of the outputted signal is gradually decreased as the location
is moved from the place where radio waves of illegal radio devices are
detected, the illegal radio device is getting farther.<br><br>
[67] As described above, in the radio wave detection module 10 according
to a preferred embodiment of the present invention, since narrowband
radio signals received through the first, second, and third single
frequency antennas 20a, 20b, and 20c are serially processed through
active elements and passive elements configuring the first, second, and
third band pass filters and the first, second, and third RF detectors
34a, 34b, and 34c, signal processing is performed in a speedy way
compared with conventional techniques in which the received signals are
processed by a separate complex circuit structure, such as a detector,
amplifier, and the like, and thus response and detection efficiency for
an illegal radio device is enhanced, and the radio wave detection module
can have excellent stability.<br><br>
[68] FIG. 6 is a view illustrating an example of implementing the radio
wave detection circuit for detecting illegal radio devices shown in FIG.
5, and FIG. 7 is a view illustrating another example of implementing the
radio wave detection circuit for detecting illegal radio devices shown in
FIG. 3.<br><br>
[69] Referring to FIGS. 6 and 7, as described above, in the radio wave
detection module<br><br>
10 for detecting illegal radio devices according to a preferred
embodiment of the present invention, since constitutional elements can be
simplified and minimized, the element configuring the radio wave
detection module 10 are integrated to be easily configured in the form of
a super-micro element or a chip.<br><br>
[70] Since such a radio wave detection module 10 can be configured as an
independent module of a super-micro size, if it is installed or mounted
on the mobile device 100 such a cellular phone 100 and 100' (refer to
FIGS. 9 and 10), input and output of <br><br>
signals are performed independently from original functions of the mobile
device. Therefore, signal interference or operation interference
accompanied by performing both of the functions are prevented, and the
radio wave detection module 10 is standardized as a single chip to be
conveniently and simply mounted on the mobile device 100.<br><br>
[71] Such a radio wave detection module 10 can be modularized in a
variety of forms.<br><br>
That is, as shown in FIG. 6, the radio wave detection module can be
configured by installing the first, second, and third single frequency
antennas 20a, 20b, and 20c, and mounting the elements that configure the
band pass filter 32, the RF detector 34, and the detection
micro-controller 40 on a circuit board 12 formed as a small thin plate
(such a circuit board 12 can be a circuit board for configuring a single
chip or a circuit board configuring a mobile device). Alternatively, as
shown in FIG. 7, the radio wave detection module can be configured by
installing the first, second, and third single frequency antennas 20a,
20b, and 20c, and mounting the elements that configure the band pass
filter 32, the RF detector 34, and detection micro-controller 40 on a
plurality of circuit boards 12a, 12b, and 12c formed as a multi-layer or
a specific structure. Needless to say, the first, second, and third
single frequency antennas 20a, 20b, and 20c, the band pass filter 32, the
RF detector 34, and the detection micro-controller 40 can be diversely
arranged depending on the condition of design, and its wiring can be set
based on a technique for configuring a general circuit board. Then, as
described above, the first, second, and third single frequency antennas
20a, 20b, and 20c can be configured using a technique for utilizing
space, in the form of a shield wrapping around the radio wave detection
module 10 or in the form of a pattern within the housing of a mobile
device (in the case of the cellular phone 100, the inner side 122 of the
housing 120) in which the radio wave detection module 10 is
installed.<br><br>
[72] At this point, in a preferred embodiment of the present, considering
the characteristic of an antenna that the length is inverse proportional
to the magnitude of a frequency, a loop antenna that can be extended in a
narrow space is applied as the first single frequency antenna 20a
assigned for wireless eavesdropping devices that transmit radio signals
of a 400 MHz frequency band, and a super-thin micro strip or chip
antenna, which can be directly installed on the surface of a circuit
board, is used as the second and third single frequency antennas 20b and
20c assigned for hidden cameras that transmit radio signals of 1.2 GHz
and 2.4 GHz frequency bands. Then, all of the loop antenna, the micro
strip antenna, and the chip antenna used as the first, second, and third
single frequency antennas 20a, 20b, and 20c in the present invention can
be manufactured in a super-micro size, and thus space can be utilized
maximally. Needless to say, as described above, if the radio wave
detection module 10 is configured to detect only either of the illegal
radio devices, i.e., the wireless <br><br>
eavesdropping device or the hidden camera, any one selected among the
first, second, and third single frequency antennas 20a, 20b, and 20c can
be applied.<br><br>
[73] Since such a radio wave detection module 10 according to the present
invention is embedded with the first, second, and third single frequency
antennas 20a, 20b, and 20c, if the radio wave detection module is
installed in a mobile device such as a cellular phone to allows a
function for detecting illegal radio devices, it will receive only a
specific radio signal of a frequency band of a radio signal transmitted
by a wireless eavesdropping device or a hidden camera, independently from
the antenna of the mobile device. Therefore, according to the present
invention, the problem of noises or signal interference of a cellular
phone having a conventional radio detection function, which is occurred
in the process of simultaneously receiving a communication signal of the
cellular phone and a radio signal transmitted by a wireless eavesdropping
device or a hidden camera through an embedded antenna, separating the
received signal, and processing the separated signal, can be
solved.<br><br>
[74] In addition, if the radio wave detection module 10 of the present
embodiment is configured as a single chip, a power terminal 14 in contact
with the circuit board 12 for applying power from outside, an output
terminal 16 for inputting and outputting data, and a ground terminal 18
are installed, and such a configuration can be set depending on the type
of the chip. For example, although the power terminal 14, the output
terminal 16, and the ground terminal 18 are installed at one side of the
circuit board 12 in FIGS. 6 and 7, if the chip is configured in a pin
type or a connector type, a configuration relevant to the type of the
chip will be provided.<br><br>
[75] FIG. 8 is a block diagram illustrating a mobile device having a
radio wave detection function for detecting illegal radio devices
according to a preferred embodiment of the present invention, FIG. 9 is a
view illustrating an example of implementing a cellular phone as an
example of a mobile device having a radio wave detection function for
detecting illegal radio devices shown in FIG. 6, and FIG. 10 is a view
illustrating another example of implementing a cellular phone as an
example of a mobile device having a radio wave detection function for
detecting illegal radio devices shown in FIG. 6. At this point, FIG. 9
(a) is a view schematically showing a circuit board 110 and a housing 120
of a cellular phone separated from each other, and FIG. 9 (b) is a view
showing the circuit board and the housing of FIG. 9 (a) combined with
each other. The cellular phone 100 shown in FIG. 9 is an example for
specifically describing the present invention and does not limit the
technical spirit of the present invention. In addition, FIG. 10 is a view
showing a battery 150a as an example among constitutional parts 150
(refer to FIG. 8) of the cellular phone, such as the battery, earphone,
microphone, Bluetooth, memory stick, and the like. FIG. 10 (a) is a view
schematically showing a disassembled state of the battery 150a, and FIGS.
10 (b) and (c) are views <br><br>
schematically showing the front and rear sides of the battery 150a before
the battery is combined with the cellular phone 100. The cellular phone
100 and the battery 150a shown in FIG. 10 are an example for specifically
describing the present invention and do not limit the technical spirit of
the present invention.<br><br>
[76] Referring to FIGS. 8 to 10, the radio wave detection module 10
according to the present invention has a modular configuration for
detecting illegal radio devices as described above to output a result of
detecting illegal radio devices to itself, and thus the radio wave
detection module is advantageous in that it can be further easily applied
to the mobile device 100 such as a cellular phone. Hereinafter, the
mobile device 100 will be described in detail with an example of the
cellular phone 100 and 100'.<br><br>
[77] The cellular phone 100 and 100' according to the present invention
is configured to be applied with the radio wave detection module 10
having the configuration and operation described above to have a radio
wave detection function for detecting illegal radio devices using a
specific frequency. At this point, the cellular phone 100 and 100'
according to the present invention basically has functions of a general
cellular phone, with which the radio wave detection module 10 according
to the present invention is electrically contacted in order to transmit a
data value of a digital form outputted from the detection
micro-controller 40 to the system micro-controller 50 (refer to a
microcomputer for controlling the cellular phone 100 and 100' of the
cellular phone 100 and 100'. The system micro-controller 50 has a
technical configuration for controlling the display 62, i.e., a display
apparatus, or the speaker 64 using the data value of a digital form
transmitted from the detection micro-controller 40 to externally display
the data value. Needless to say, as describe above, the system
micro-controller 50 of the cellular phone 100 and 100' can be applied as
the detection micro-controller 40, and since the detection
micro-controller 40 is replaced with the system microcontroller 50,
detailed descriptions of the operation according to such a configuration
will be omitted.<br><br>
[78] As a form implementing such a technique, as shown in FIG. 9, the
radio wave detection module can be mounted on the circuit board 110 of
the cellular phone 100 (in the present embodiment, although the main
circuit board on which the system microcontroller 50 is installed is
shown, such a circuit board can be applied to other circuit boards) to be
installed in the main body of the cellular phone 100. Alternatively, as
shown in FIG. 10, the radio wave detection module can be configured such
that connection terminals, such as the power terminal 14, the output
terminal 16, and the ground terminal 18, are installed in the
constitutional part 150 of the cellular phone, such as a battery 150a,
earphone, microphone, Bluetooth, memory stick, or the like, connected to
the external line connection terminal 130 of the cellular phone 100'. At
this point, although a radio wave detection module installed in the
battery 150a is <br><br>
shown in FIG. 10 as an example, the radio wave detection module can be
installed in other constitutional parts 150 of the cellular phone to
configure a variety of forms under the technical spirit of the present
invention.<br><br>
[79] In such a cellular phone 100 and 100' according to a preferred
embodiment of the present invention, a program for performing a radio
wave detection function for detecting illegal radio devices using a
specific frequency is mounted, and the system micro-controller 50 for
performing functions of the cellular phone is basically installed. Then,
the radio wave detection module 100 described above is connected to be
supplied power from the battery of the cellular phone 100 and 100' and is
in contact with the input and output ports of the system micro-controller
50. The radio wave detection module is installed so as to transmit a data
value related to detection of an illegal radio device to the system
micro-controller 50.<br><br>
[80] At this point, as described above, the radio wave detection module
10 can be installed in the main body of the cellular phone 100 as shown
in FIG. 9 or in a constitutional part 150 of the cellular phone as shown
in FIG. 10.<br><br>
[81] As shown in FIG. 9, if the radio wave detection module 10 is
installed inside the cellular phone 100 to configure the cellular phone
100, a chip socket 114 connected to the input and output ports of the
system micro-controller 50 is installed on the circuit board 110 of the
cellular phone to be combined with the radio wave detection module 10.
Needless to say, as described above, such a chip socket 114 is not
limited to the main circuit board on which the system micro-controller 50
is installed, nor the position is limited. For example, recently, there
is provided a technique for conveniently attaching and detaching a
chipset that has a specific function for enhancing value-added functions
through a cellular phone, and the present invention can be implemented in
such a form.<br><br>
[82] In addition, as shown in FIG. 10, if the radio wave detection module
10 is installed in the battery 150a, which is a constitutional part 150
of a cellular phone, to configure the cellular phone 100', the radio wave
detection module 10 can be installed to be combined with a mounting
depression 114' formed on the battery circuit board 152 of the battery
150a and placed within the housing 160. At this point, the connection
terminals of the radio wave detection module 10, such as the power
terminal 14, the output terminal 16, and the ground terminal 18, are
configured separately from the battery terminal 154, and when they are
contacted with the external line connection terminal 130 of the main body
of the cellular phone 100', they are connected to the system
micro-controller 50 to perform a function for detecting illegal radio
devices. Needless to say, such a connection structure can be configured
by applying a variety of techniques in the art.<br><br>
[83] In such a cellular phone 100 and 100' according to a preferred
embodiment of the <br><br>
present invention, the radio wave detection module 10 is connected to the
system micro-controller 50 of the cellular phone 100 and 100', and the
radio wave detection module 10 transfers data values of a digital form
for radio signals of an illegal radio device to the system
micro-controller 50, and the system micro-controller 50 controls to
output a detection signal for the illegal radio device to outside of the
cellular phone 100 and 100' through a display apparatus, such as the
display 62, the speaker 64, or the like.<br><br>
[84] Such a cellular phone 100 and 100' having the radio wave detection
function for detecting illegal radio devices according to the present
invention performs the detection function, and the detection function for
detecting illegal radio devices can be performed only by downloading an
application program for outputting the data value of a digital form
inputted from the radio wave detection module 10 to the display apparatus
of the cellular phone 100 and 100'.<br><br>
[85] As described above, although a radio wave detection method, a radio
wave detection module, and a mobile device having a radio wave detection
function using the method and the module have been described referring to
figures, but it is merely an example, and it will be readily understood
by those skilled in the art that various adaptations and changes can be
made thereto without departing from the spirit and scope of the present
invention defined by the appended claims. Mode for the Invention<br><br>
[86] In order to accomplish the above objects of the invention, according
to one aspect of the invention, there is provided a radio wave detection
method for detecting an illegal radio device that uses a radio signal of
a designated frequency band, the method comprising the steps of:
receiving a narrowband radio signal including a radio signal of a
frequency band used by the illegal radio device through a single
frequency antenna, and obtaining a direct current voltage value for a
specific frequency of the illegal radio device by serially processing the
received narrowband radio signal; transmitting the obtained direct
current voltage value to a micro-controller through an analog-to-digital
converter port of the micro-controller, and outputting a data value of a
digital form from the micro-controller; and externally displaying
existence of the illegal radio device through a display apparatus using
the outputted data value of a digital form.<br><br>
[87] In the radio wave detection method for detecting an illegal radio
device according to the present invention, the step of obtaining a direct
current voltage value for a specific frequency of the illegal radio
device comprises the steps of: extracting the radio signal of the
frequency band used by the illegal radio device from the narrowband radio
signal received through the single frequency antenna, using a band pass
filter; and extracting the specific frequency of the illegal radio device
through an <br><br>
RF detector from the radio signal extracted through the band pass filter,
and converting the extracted frequency into the direct current voltage
value that is an electrical signal transmitted to the analog-to-digital
converter port of the micro-controller.<br><br>
[88] In the radio wave detection method for detecting an illegal radio
device according to the present invention, the step of externally
displaying existence of the illegal radio device through a display
apparatus using the outputted data value of a digital form comprises the
steps of: transmitting the data value of a digital form outputted from
the micro-controller to a system micro-controller through an input-output
port (IO port) of the system micro-controller; and externally displaying
the data value of a digital form through the display apparatus under a
control of the system micro-controller.<br><br>
[89] According to another aspect of the invention, there is provided a
radio wave detection module for detecting an illegal radio device that
uses a radio signal of a designated frequency band, the module
comprising: a single frequency antenna selected from a group comprising a
loop antenna, a micro-strip antenna, and a chip antenna, for receiving a
narrowband radio signal including a radio signal of a frequency band used
by the illegal radio device; a radio signal processing unit for obtaining
a direct current voltage value for a specific frequency of the illegal
radio device by serially processing the narrowband radio signal received
from the single frequency antenna; and a micro-controller for outputting
the direct current voltage value obtained from the radio signal
processing unit as a data value of a digital form.<br><br>
[90] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are installed
to be mounted on a circuit board of a device having a function for
detecting the illegal radio device.<br><br>
[91] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are formed as
a single chip.<br><br>
[92] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are formed as
a single chip mounted on a chip socket that is installed on a circuit
board of a device, which is provided with a separate system
micro-controller to have a function for detecting an illegal radio
device, to be contact with an IO port of the system micro-controller, so
that the data value of a digital form outputted from the micro-controller
is inputted into the system micro-controller.<br><br>
[93] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the single frequency antenna,
the radio signal processing unit, and the micro-controller are installed
to be contact with an external line connection terminal that is installed
on a circuit board of a device, which is provided with a <br><br>
separate system micro-controller to have a function for detecting an
illegal radio device, to be contact with an IO port of the system
micro-controller, so that the data value of a digital form outputted from
the micro-controller is inputted into the system
micro-controller.<br><br>
[94] In the radio wave detection module for detecting an illegal radio
device according to the present invention, the radio signal processing
unit comprises: a band pass filter for extracting the radio signal of the
frequency band used by the illegal radio device from the narrowband radio
signal received through the single frequency antenna; and an RF detector
for extracting the specific frequency of the illegal radio device from
the radio signal extracted through the band pass filter, and converting
the extracted frequency into the direct current voltage value that is an
electrical signal transmitted to the analog-to-digital converter port of
the micro-controller.<br><br>
[95] According to another aspect of the invention, there is provided a
mobile device having a radio wave detection function for detecting an
illegal radio device that uses a radio signal of a designated frequency
band, the mobile device comprising: a system micro-controller mounted
with a program for performing the function for detecting an illegal radio
device that uses a radio signal of a designated frequency band, for
performing original functions of the mobile device; and a radio wave
detection module connected to the system micro-controller to be supplied
with power from a battery of the mobile device, for transmitting a result
of detecting the illegal radio device to the system micro-controller,
wherein the radio wave detection module is provided with a single
frequency antenna selected from a group comprising a loop antenna, a
micro- strip antenna, and a chip antenna, for receiving a narrowband
radio signal including a radio signal of a frequency band used by the
illegal radio device.<br><br>
[96] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module comprises: a band pass filter for extracting
a radio signal of a frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna; and an RF detector for extracting the specific frequency of the
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extracted frequency into a direct current
voltage value that is an electrical signal transmitted to an
analog-to-digital converter port of the system microcontroller.<br><br>
[97] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module comprises: a band pass filter for extracting
a radio signal of a frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna; and an RF detector for extracting the specific frequency of the
<br><br>
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extract frequency into a direct current
voltage value; and a detection micro-controller for receiving the direct
current voltage value obtained by the RF detector through an
analog-to-digital converter port, converting the direct current voltage
value into a data value of a digital form through an internal operation,
and transmitting the data value of a digital form to the system
micro-controller through an IO port of the system
micro-controller.<br><br>
[98] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module is formed as a single chip installed in a
main body of the mobile device where the system micro-controller is
installed.<br><br>
[99] The mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention
further comprises an external line connection terminal connected to the
system micro-controller, wherein the radio wave detection module is
installed in a constitutional part of the mobile device selected among a
group comprising a battery, earphone, microphone, Bluetooth, and memory
stick, and thus when the constitutional part of the mobile device is
connected to the external line connection terminal, the radio wave
detection module is connected to the system micro-controller and performs
the function for detecting an illegal radio device.<br><br>
[100] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
radio wave detection module is installed to be mounted on a circuit board
of the mobile device.<br><br>
[101] In the mobile device having a radio wave detection function for
detecting an illegal radio device according to the present invention, the
single frequency antenna of the radio wave detection module is installed
to be formed in a shape of a pattern on an inner surface of a housing of
the main body of the mobile device. Industrial Applicability<br><br>
[102] According to a radio wave detection method and a radio wave
detection module for detecting illegal radio devices, since a narrowband
radio signal including a radio signal of a frequency band used by an
illegal radio device is received using single frequency antennas and
processed in serial, the illegal radio device can be detected with
excellent stability and high response and detection efficiency compared
with conventional techniques. Particularly, since a direct current
voltage for a specific frequency of the illegal radio device is obtained
through a serial process after receiving a narrowband radio signal
including a radio signal of a frequency band used by the illegal radio
device using single frequency antennas, a problem of making a moblie
device unstable due to noises or erroneous signals inputted while
processing the received signal can be <br><br>
effectively removed, and thus response and detection efficiency for the
radio signal of the illegal radio device can be enhanced. In addition, in
implementing an apparatus for detecting illegal radio devices, the
present invention can be configured in a form of a module utilizing
active elements and passive elements, and the module can be installed in
a circuit board or configured as a single chip. Therefore, since the
configuration is simplified compared with conventional techniques, the
apparatus can be miniaturized, and a function for detecting illegal radio
devices can be easily applied to a mobile device such as a cellular
phone. In addition, since the present invention can be configured to
output a data value of a digital form through the micro-controller
(microcomputer) installed in itself, a hardware configuration for
detecting a radio signal of an illegal radio device does not need to be
additionally configured in a mobile device such as a cellular phone, and
thus the present invention is highly compatible with a variety of mobile
devices. Particularly, since the radio wave detection module according to
the present invention can be configured as a single chip, a wave radio
detection function for detecting illegal radio devices can be applied
only by adding a configuration (a socket or an external line connection
terminal) for combining a radio wave detection circuit to a desired
mobile device such as a cellular phone, and thus burdens on designing a
desired device to which the present invention is applied can be
diminished. Furthermore, unlike conventional techniques, in the present
invention, since a module having a radio wave detection function for
detecting illegal radio devices can be added while diminishing burdens on
designing a module of a mobile device, an illegal radio device can be
detected stably and efficiently without deteriorating original functions
of the mobile device. Particularly, since single frequency antennas are
installed in addition to the antenna of the mobile device and a detection
micro-controller for performing the radio wave detection function is
configured in addition to the system micro-controller, the radio wave
detection function is separated from the original functions of the mobile
device to stably and efficiently perform the detection function, and the
mobile device can smoothly perform its original functions. In addition,
since single frequency antennas are installed in addition to the antenna
of the mobile device, it is advantageous in that a modification of design
for installing the antennas is not required to a mobile device that does
not use an antenna, such as a calculator, digital camera, PSP, and the
like. Although the present invention has been described with reference to
several preferred embodiments, the description is illustrative of the
invention and is not to be construed as limiting the invention. Various
modifications and variations may occur to those skilled in the art,
without departing from the scope of the invention as defined by the
appended claims. <br><br>
<br>
WO 2008066263 20080605 Claims <br><br>
[1] A radio wave detection method for detecting an illegal radio device
that uses a radio signal of a designated frequency band, the method
comprising the steps of: receiving a narrowband radio signal including a
radio signal of a frequency band used by the illegal radio device through
a single frequency antenna, and obtaining a direct current voltage value
for a specific frequency of the illegal radio device by serially
processing the received narrowband radio signal; transmitting the
obtained direct current voltage value to a micro-controller through an
analog-to-digital converter port of the micro-controller, and outputting
a data value of a digital form from the micro-controller; and externally
displaying existence of the illegal radio device through a display
apparatus using the outputted data value of a digital form.<br><br>
[2] The method according to claim 1, wherein the step of obtaining a
direct current voltage value for a specific frequency of the illegal
radio device comprises the steps of: extracting the radio signal of the
frequency band used by the illegal radio device from the narrowband radio
signal received through the single frequency antenna, using a band pass
filter; and extracting the specific frequency of the illegal radio device
through an RF detector from the radio signal extracted through the band
pass filter, and converting the extracted frequency into the direct
current voltage value that is an electrical signal transmitted to the
analog-to-digital converter port of the microcontroller.<br><br>
[3] The method according to claim 1 or 2, wherein the step of externally
displaying existence of the illegal radio device through a display
apparatus using the outputted data value of a digital form comprises the
steps of: transmitting the data value of a digital form outputted from
the micro-controller to a system micro-controller through an input-output
port (IO port) of the system micro-controller; and externally displaying
the data value of a digital form through the display apparatus under a
control of the system micro-controller.<br><br>
[4] A radio wave detection module for detecting an illegal radio device
that uses a radio signal of a designated frequency band, the module
comprising: a single frequency antenna selected from a group comprising a
loop antenna, a micro-strip antenna, and a chip antenna, for receiving a
narrowband radio signal including a radio signal of a frequency band used
by the illegal radio device; a radio signal processing unit for obtaining
a direct current voltage value for a <br><br>
specific frequency of the illegal radio device by serially processing the
narrowband radio signal received from the single frequency antenna; and a
micro-controller for outputting the direct current voltage value obtained
from the radio signal processing unit as a data value of a digital
form.<br><br>
[5] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller are
installed to be mounted on a circuit board of a device having a function
for detecting the illegal radio device.<br><br>
[6] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller are
formed as a single chip.<br><br>
[7] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller are
formed as a single chip mounted on a chip socket that is installed on a
circuit board of a device, which is provided with a separate system
micro-controller to have a function for detecting an illegal radio
device, to be contact with an IO port of the system microcontroller, so
that the data value of a digital form outputted from the microcontroller
is inputted into the system micro-controller.<br><br>
[8] The module according to claim 4, wherein the single frequency
antenna, the radio signal processing unit, and the micro-controller are
installed to be contact with an external line connection terminal that is
installed on a circuit board of a device, which is provided with a
separate system micro-controller to have a function for detecting an
illegal radio device, to be contact with an IO port of the system
micro-controller, so that the data value of a digital form outputted from
the micro-controller is inputted into the system
micro-controller.<br><br>
[9] The module according to any one of claims 4 to 8, wherein the radio
signal processing unit comprises: a band pass filter for extracting the
radio signal of the frequency band used by the illegal radio device from
the narrowband radio signal received through the single frequency
antenna; and an RF detector for extracting the specific frequency of the
illegal radio device from the radio signal extracted through the band
pass filter, and converting the extracted frequency into the direct
current voltage value that is an electrical signal transmitted to the
analog-to-digital converter port of the micro-controller.<br><br>
[10] A mobile device having a radio wave detection function for detecting
an illegal radio device that uses a radio signal of a designated
frequency band, the mobile device comprising: a system micro-controller
mounted with a program for performing the function for detecting an
illegal radio device that uses a radio signal of a designated <br><br>
frequency band, for performing original functions of the mobile device;
and a radio wave detection module connected to the system
micro-controller to be supplied with power from a battery of the mobile
device, for transmitting a result of detecting the illegal radio device
to the system micro-controller, wherein the radio wave detection module
is provided with a single frequency antenna selected from a group
comprising a loop antenna, a micro-strip antenna, and a chip antenna, for
receiving a narrowband radio signal including a radio signal of a
frequency band used by the illegal radio device.<br><br>
[11] The mobile device according to claim 10, wherein the radio wave
detection module comprises: a band pass filter for extracting a radio
signal of a frequency band used by the illegal radio device from the
narrowband radio signal received through the single frequency antenna;
and an RF detector for extracting the specific frequency of the illegal
radio device from the radio signal extracted through the band pass
filter, and converting the extracted frequency into a direct current
voltage value that is an electrical signal transmitted to an
analog-to-digital converter port of the system micro-controller.<br><br>
[12] The mobile device according to claim 10, wherein the radio wave
detection module comprises: a band pass filter for extracting a radio
signal of a frequency band used by the illegal radio device from the
narrowband radio signal received through the single frequency antenna; an
RF detector for extracting the specific frequency of the illegal radio
device from the radio signal extracted through the band pass filter, and
converting the extract frequency into a direct current voltage value; and
a detection micro-controller for receiving the direct current voltage
value obtained by the RF detector through an analog-to-digital converter
port, converting the direct current voltage value into a data value of a
digital form through an internal operation, and transmitting the data
value of a digital form to the system micro-controller through an IO port
of the system micro-controller.<br><br>
[13] The mobile device according to claims 10 to 12, wherein the radio
wave detection module is formed as a single chip installed in a main body
of the mobile device where the system micro-controller is
installed.<br><br>
[14] The mobile device according to claims 10 to 12, further comprising
an external line connection terminal connected to the system
micro-controller, wherein the radio wave detection module is installed in
a constitutional part of the mobile device selected among a group
comprising a battery, earphone, microphone, Bluetooth, and memory stick,
and thus when the constitutional part of the mobile <br><br>
device is connected to the external line connection terminal, the radio
wave detection module is connected to the system micro-controller and
performs the function for detecting an illegal radio device. [15] The
mobile device according to claims 10 to 12, wherein the radio wave
detection module is installed to be mounted on a circuit board of the
mobile device. [16] The mobile device according to claims 10 to 12,
wherein the single frequency antenna of the radio wave detection module
is installed to be formed in a shape of a pattern on an inner surface of
a housing of the main body of the mobile device. <br><br>
<br>
<x-sigsep><p></x-sigsep>
---------------------------------------------------------------------------=
-------------------------<br>
World Class, Professional, Ethical, and Competent Bug Sweeps,
and<br>
Wiretap Detection using Sophisticated Laboratory Grade Test
Equipment.<br>
---------------------------------------------------------------------------=
-------------------------<br>
James M.
Atkinson &=
nbsp; &nbs=
p;
Phone: (978) 546-3803<br>
Granite Island
Group &nbs=
p; &=
nbsp;
Fax: (978) 546-9467<br>
127 Eastern Avenue
#291  =
;
Web:
<a href=3D"
http://www.tscm.com/" eudora=3D"autourl">
http://www.tscm.com/<br=
>
</a> Gloucester, MA
01931-8008  =
;
E-mail:
<a href=3D"mailto:jm..._at_tscm.com" eudora=3D"autourl">mailto:jm..._at_tscm.com<=
br>
</a>
---------------------------------------------------------------------------=
-------------------------<br>
We perform bug sweeps like it's a full contact sport, we take no
prisoners, <br>
and we give no quarter. Our goal is to simply, and completely stop the
spy.<br>
---------------------------------------------------------------------------=
-------------------------<br>
<br>
</body>
</html>
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--=====================_837667859==.REL--
Received on Sat Mar 02 2024 - 00:57:18 CST
