JP5569875B2 - Wireless communication suppression device - Google Patents

Description

  The present invention relates to a wireless communication suppression device, and more particularly to a wireless communication suppression device suitable for a spread spectrum communication system.

  In order to prevent wire fraud, a wireless communication deterrence device that deters mobile phone calls by radiating noise radio waves at an ATM (Automated Teller Machine) corner of a bank has been developed.

  As an example of such a wireless communication suppression device, for example, Patent Document 1 discloses the following configuration. That is, in the mobile phone communication suppression system that suppresses the communication function of the mobile phone by interfering with the radio waves of the control channel and the plurality of call channels transmitted from the base station of the mobile phone system to the mobile station, the same control channel A control channel deterrence circuit for transmitting jamming radio waves of the same frequency and a call channel deterrence circuit for transmitting jamming radio waves having a bandwidth including the same plurality of frequencies as the plurality of call channels.

JP 2006-128945 A

  In a conventional wireless communication suppression device, for example, a synthesizer method is employed in which a frequency of a suppression radio wave is changed to sweep a predetermined frequency band. However, when a synthesizer-type wireless communication suppression device is used in a communication system that employs spread spectrum communication, when the suppression signal received by the mobile phone is despread, this despreading causes the suppression signal to be The level is attenuated. For this reason, it has been difficult for conventional wireless communication suppression devices to sufficiently suppress cellular phone calls. Further, if the output level of the suppression radio wave is increased in order to increase the level of the suppression signal received by the mobile phone, leakage to the non-inhibition area occurs.

  However, Patent Document 1 does not disclose a configuration for solving such a problem.

  Therefore, an object of the present invention is to provide a wireless communication suppressing device that can sufficiently suppress wireless communication in a specific area and can be downsized.

  In order to solve the above problems, a wireless communication suppression device according to an aspect of the present invention is a wireless communication suppression device for suppressing wireless communication of a wireless communication device in a predetermined area, and for generating a noise signal. A noise generator, a first distributor for distributing the noise signal generated by the noise generator, and the noise signal distributed by the first distributor, respectively; Among them, a plurality of band-pass filters that attenuate components outside a predetermined frequency band and have the predetermined frequency bands different from each other, and a combiner for combining the plurality of noise signals that have passed through the plurality of band-pass filters, And an antenna unit for outputting the noise signal synthesized by the synthesizer to the predetermined area.

  Preferably, the antenna unit includes a plate-like line member having a conductive line for transmitting the noise signal synthesized by the combiner, and a plate-like antenna element electrically connected to the conductive line. The line member and the antenna element are provided so as to face each other.

  More preferably, the wireless communication suppression device further includes a housing for housing the line member and the antenna element, and the housing is formed to surround the line member and the antenna element, and An opening for outputting the noise signal is formed, and the line member is provided on the side opposite to the opening with respect to the antenna element.

  More preferably, the antenna unit further includes a radio wave absorbing member provided between the antenna element and the line member.

  More preferably, the antenna unit further includes a radio wave absorbing member provided between the casing and the line member.

  Preferably, the wireless communication suppression device further includes a coaxial line for transmitting the noise signal synthesized by the combiner as an unbalanced signal to the conductive line, and the antenna unit is electrically connected to the conductive line. Plate-like first antenna element and second antenna element connected to each other, and the conductive line converts the unbalanced signal into a balanced signal to convert the first antenna element and the second antenna. Transmit to the element.

  Preferably, the wireless communication suppression device further includes a first casing and a second casing, and a cable connecting the first casing and the second casing, and the noise generator The first distributor, the plurality of bandpass filters, and the combiner are housed in the first housing, and the antenna unit is housed in the second housing.

  More preferably, the second casing is provided above an operation unit of an ATM (Automated Teller Machine) device.

  More preferably, the first casing and the second casing are provided on the side of the operation unit of the ATM device.

  Preferably, the wireless communication suppression device includes a plurality of the antenna units, and further includes a first housing and a plurality of second housings, and a first for distributing the noise signal combined by the combiner. 2 distributors, the first casing and the plurality of second casings are connected to each other, and the noise signals distributed by the second distributor are respectively transmitted to the plurality of antenna units. The noise generator, the first distributor, the second distributor, the plurality of bandpass filters and the combiner are housed in the first housing, and The plurality of antenna units are housed in the plurality of second housings, respectively.

  More preferably, the plurality of second casings are respectively provided between operation units of a plurality of ATM devices arranged in a line.

  Preferably, the antenna unit outputs the noise signal combined by the combiner to the predetermined area by circular polarization.

  According to the present invention, it is possible to sufficiently suppress wireless communication in a specific area and reduce the size.

It is a functional block diagram which shows the structure of the radio | wireless communication suppression apparatus which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the structure of the antenna part which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the structure of the antenna part which concerns on the 1st Embodiment of this invention. It is a figure which shows the connection relation of each member in the antenna part which concerns on the 1st Embodiment of this invention. (A) is a top view which shows the structure of the balun in the antenna part which concerns on the 1st Embodiment of this invention. (B) is sectional drawing which shows the structure of the balun in the antenna part which concerns on the 1st Embodiment of this invention. It is a figure which shows the frequency spectrum of the transmission signal in the transmission side (base station) of a spread spectrum communication system. (A) is a figure which shows the frequency spectrum of the received signal in the receiving side (cell-phone) of a spread-spectrum communication system when the suppression electromagnetic wave does not exist in a wireless propagation path. (B) is a figure which shows the frequency spectrum of the received signal in the receiving side (cell-phone) of a spread-spectrum communication system when the suppression electric wave by the conventional synthesizer system is transmitted. (C) is a figure which shows the frequency spectrum of the received signal in the receiving side (cell-phone) of a spread-spectrum communication system when a noise signal is transmitted from the radio | wireless communication suppression apparatus which concerns on the 1st Embodiment of this invention. It is. (A) And (b) is a figure which shows an example of the attachment position of the radio | wireless communication suppression apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the structure for concealingly attaching the radio | wireless communication suppression apparatus which concerns on the 1st Embodiment of this invention. (A)-(c) is a figure which shows the example of concealment attachment of the radio | wireless communication suppression apparatus which concerns on the 1st Embodiment of this invention. It is a functional block diagram which shows the structure of the radio | wireless communication suppression apparatus which concerns on the 2nd Embodiment of this invention. (A) And (b) is a figure which shows an example of the attachment position of the radio | wireless communication suppression apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the other example of the attachment position of the radio | wireless communication suppression apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the other example of the attachment position of the radio | wireless communication suppression apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the structure of the radio | wireless communication suppression apparatus which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<First Embodiment>
[Configuration and basic operation]
FIG. 1 is a functional block diagram showing the configuration of the wireless communication inhibiting device according to the first embodiment of the present invention.

  Referring to FIG. 1, the wireless communication suppression device 101 includes a noise signal generation unit GEN and an antenna unit ANT. The noise signal generator GEN includes a noise generator 1, a distributor 2, BPF (band pass filter) banks 3A, 3B, 3C, 3D, variable attenuators 4A, 4B, 4C, 4D, and a synthesizer 5. , Level setter 6 and RF-AMP 7.

  The wireless communication suppression device 101 further includes a housing K1 and a housing K2, a cable CBL that connects the housing K1 and the housing K2, an RF connector CN1, an RF connector CN2, and a power connector CN3. The noise signal generation unit GEN is accommodated in the housing K1. The RF connector CN2 and the power connector CN3 are attached to the housing K1. The antenna unit ANT is accommodated in the housing K2, and the RF connector CN1 is attached to the housing K2. The cable CBL is, for example, a coaxial line.

  The wireless communication suppression device 101 suppresses wireless communication of a mobile phone in a predetermined area. Note that the target for which the wireless communication suppression device 101 suppresses wireless communication is not limited to a mobile phone, and any wireless communication device capable of performing wireless communication may be used.

  The dimensions of the casing K1 are, for example, 150 mm long × 150 mm wide × 15 mm wide, and the weight is, for example, about 2 kg.

  The noise generator 1 generates and outputs a noise signal having a frequency band of, for example, 800 MHz to 2200 MHz.

  The distributor 2 distributes the noise signal received from the noise generator 1, that is, branches the noise signal and outputs it to the BPF banks 3A, 3B, 3C, 3D.

  The BPF banks 3A, 3B, 3C, 3D receive the noise signal distributed by the distributor 2, and attenuate components outside the predetermined frequency band in the noise signal. This predetermined frequency band is different between the BPF banks 3A, 3B, 3C, and 3D. For example, the pass band of BPF bank 3A is 810 MHz to 818 MHz, 838 MHz to 846 MHz, and 860 MHz to 885 MHz, the pass band of BPF bank 3B is 1477 MHz to 1501 MHz, and the pass band of BPF bank 3C is 1854.9 MHz to 1859.9 MHz. 1864.9 MHz to 1879.9 MHz and 1893.5 MHz to 1919.6 MHz, and the pass band of the BPF bank 3D is 2115 MHz to 2170 MHz. In addition, a part of pass band of each BPF bank may overlap.

  The variable attenuators 4A, 4B, 4C, and 4D adjust and output the levels of the noise signals that have passed through the BPF banks 3A, 3B, 3C, and 3D based on the external control signals.

  The synthesizer 5 synthesizes a plurality of noise signals received from the variable attenuators 4A, 4B, 4C, 4D.

  The level setter 6 adjusts and outputs the level of the noise signal synthesized by the synthesizer 5 based on the external control signal.

  The RF-AMP 7 amplifies the noise signal received from the level setting device 6 and outputs the amplified noise signal to the antenna unit ANT via the RF connector CN2 and the cable CBL. The output level of the RF-AMP 7 is, for example, 1 mW (0 dBm). The cable CBL transmits the noise signal output from the RF-AMP 7 to the RF connector CN1 in the antenna unit ANT as an unbalanced signal.

  The power connector CN3 is connected to an external power supply line, and supplies the power supply voltage Vcc and the ground voltage GND to each block in the wireless communication suppression device 101.

  The antenna unit ANT emits a noise signal from the RF-AMP 7 received at the RF connector CN1 to a predetermined area as a suppression radio wave. The dimensions of the housing K2 are, for example, 100 mm long × 100 mm wide × 10 mm wide, and the weight is, for example, about 300 g. The input impedance of the antenna unit ANT is, for example, 50Ω.

  FIG. 2 is a perspective view showing the configuration of the antenna unit according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view showing the configuration of the antenna unit according to the first embodiment of the present invention.

  2 and 3, antenna portion ANT further includes antenna elements E1, E2, radio wave absorbing members 11A, 11B, balun 12, and protective film 74.

  The housing K2 is a metal case, for example, and is formed so as to surround the balun 12 and the antenna elements E1 and E2. The casing K2 has a cylindrical shape that is open without one bottom surface. The housing K2 has an outer peripheral portion 71, a bottom surface portion 72, and an opening 73. The antenna elements E1 and E2 output the noise signal transmitted through the cable CBL and the balun 12 from the opening 73. The casing K2 defines the directivity of the antenna unit ANT, that is, it is possible to limit a wireless communication suppression target area. The opening 73 is covered with a protective film 74 such as a plastic thin film through which radio waves can pass. The antenna unit ANT may be configured not to include the protective film 74.

  The balun 12 is provided on the side opposite to the opening 73 with respect to the antenna elements E1 and E2.

  The antenna elements E1 and E2 are provided so as to extend substantially parallel to the extending direction of the bottom surface portion 72. The antenna elements E1 and E2 are provided so that one of the main surfaces thereof faces the opening 73 of the housing K2. The antenna elements E1 and E2 are provided at a distance from the outer peripheral portion 71 of the housing K2. Thereby, collapse of the radiation pattern can be prevented, that is, generation of side lobes in the directivity of the antenna unit ANT can be suppressed. For example, the distance between the antenna elements E1 and E2 and the outer peripheral portion 71 of the housing K2 is, for example, 5 mm.

  The width of the outer peripheral portion 71 of the housing K2 is, for example, 10 mm, and the diameter of the bottom surface portion 72 of the housing K2 is, for example, 100 mm.

  The RF connector CN2 and the cable CBL are attached to the outer peripheral portion 71 of the housing K2.

  The antenna elements E1 and E2 constitute, for example, a bow tie antenna, each of which is a triangular plate-like member, is provided extending in substantially the same plane, and each vertex 61, 62 is They are spaced from each other so as to face each other. The antenna elements E1 and E2 output linearly polarized waves. By adopting a planar antenna such as a bow / tie antenna as an antenna in the antenna unit ANT, the antenna unit ANT can be thinned. In addition, when a dipole antenna is used in the wireless communication suppression apparatus 101, a plurality of antenna elements of 8 to 10 are required, but the number of antenna elements can be reduced by employing a bow-tie antenna. Therefore, cost reduction and downsizing can be achieved.

  A balun 12, which is a plate-like line member, is connected between the cable CBL and the antenna elements E1, E2. The balun 12 includes a substrate having a main surface S1 provided on the antenna elements E1 and E2 side and a main surface S2 provided on the opposite side of the antenna elements E1 and E2, that is, on the bottom surface 72 side of the housing K2.

  The balun 12 and the antenna elements E1, E2 are provided so as to face each other. For example, the balun 12 is provided inclined with respect to the antenna elements E1 and E2. That is, the antenna elements E1, E2 and the balun 12 are provided such that the extending direction of the balun 12 and the extending direction of the antenna elements E1, E2 form an acute angle. The balun 12 includes a conductive line LN provided on the main surface S1 for transmitting a noise signal synthesized by the synthesizer 5. The antenna elements E1, E2 and the balun 12 may be provided so as to extend substantially in parallel with each other.

  The radio wave absorbing member 11 </ b> A is provided between the antenna element E <b> 2 and the main surface S <b> 1 of the balun 12. The radio wave absorbing member 11B is provided between the casing K2 and the main surface S2 of the balun 12, and between the antenna element E1 and the casing K2. The radio wave absorbing member 11 </ b> A suppresses radio wave reflection and interference between the antenna elements E <b> 1 and E <b> 2 and the balun 12. The radio wave absorbing member 11B suppresses multiple reflections of radio waves in the housing K2. Further, the radio wave absorbing members 11A and 11B also serve to support the antenna elements E1 and E2 and the balun 12 in the housing K2.

  FIG. 4 is a diagram showing a connection relation of each member in the antenna unit according to the first embodiment of the present invention. FIG. 5A is a plan view showing the configuration of the balun in the antenna unit according to the first embodiment of the present invention. FIG.5 (b) is sectional drawing which shows the structure of the balun in the antenna part which concerns on the 1st Embodiment of this invention.

  Referring to FIGS. 4 and 5A, 5B, a tapered feed line LN is formed of a copper foil on the main surface S1 of the balun 12. A solid copper foil is formed on the main surface S2. The end portion 64 of the feeder line LN on the main surface S1 and the inner conductor of the cable CBL are electrically connected, and the one end portion of the copper foil on the main surface S2 and the outer conductor of the cable CBL are electrically connected. . Of the vertices facing the antenna elements E1 and E2, the vertex 61 of the antenna element E1 is connected to the other end of the copper foil on the main surface S2, and the vertex 62 of the antenna element E2 and the end 63 of the feed line LN are connected. It is connected.

  The balun 12 converts a noise signal, which is an unbalanced signal received from the cable CBL, into a balanced signal and outputs it to the antenna elements E1 and E2.

  Moreover, in the balun 12, impedance conversion is performed by using the feeder line LN as a taper line. That is, the feed line LN has a tapered shape in which the width at the end portion 64 on the cable CBL side is larger than the width at the end portion 63 on the antenna elements E1 and E2 side. That is, the characteristic impedance at the end portion 64 on the cable CBL side is 50Ω, but the characteristic impedance at the end portion 63 on the antenna element E1, E2 side is several hundred Ω due to the feeding line LN having a tapered shape.

  The height from the apex 61 to the bottom of the antenna elements E1 and E2 is, for example, 45 mm, and the length of the bottom is, for example, 20 mm. The substrate of the balun 12 is, for example, 8 mm long × 45 mm wide × 1.5 mm thick, the length of the feed line LN in the extending direction is, for example, 45 mm, and the width at the end 64 of the feed line LN is, for example, 5 mm.

  Next, the superiority of the noise generation method employed by the wireless communication suppression device according to the first embodiment of the present invention will be described.

  FIG. 6 is a diagram illustrating a frequency spectrum of a transmission signal on the transmission side (base station) of the spread spectrum communication system.

  Referring to FIG. 6, here, consider the case of transmitting one bit of data. First, it is assumed that a transmission signal before spread spectrum by a PN (pseudo noise) code has a constant energy = 10. The energy of the transmission signal with power = 10 and frequency band = 1 is 10 × 1 = 10.

  By generating such a transmission signal in the base station and spectrum-spreading this transmission signal, a transmission signal with power = 1 and frequency band = 10 is transmitted to the reception side.

  FIG. 7A is a diagram showing a frequency spectrum of a received signal on the receiving side (mobile phone) of the spread spectrum communication system when there is no suppression radio wave in the wireless propagation path. FIG. 7B is a diagram illustrating a frequency spectrum of a reception signal on the reception side (mobile phone) of the spread spectrum communication system when a suppression radio wave according to a conventional synthesizer method is transmitted. FIG.7 (c) shows the frequency spectrum of the received signal at the receiving side (cell phone) of the spread spectrum communication system when the noise signal is transmitted from the wireless communication suppressing apparatus according to the first embodiment of the present invention. FIG.

  Referring to FIG. 7A, when the mobile phone receives a radio signal as shown in FIG. 6, the received radio signal is correlated with the same PN code as that on the transmission side, that is, despreading is performed. As a result, a signal with power = 10 and frequency band = 1 can be reproduced, and the S / N (Signal to Noise) ratio for the spreading factor can be improved.

  Referring to FIG. 7B, in the conventional synthesizer method, the suppression signal component is transmitted with a power 10 times that of the main signal component (S) transmitted from the base station. Here, the suppression signal component does not always cover all of the frequency band = 10, and has only a frequency band of magnitude 1 at a certain moment. That is, the S / N ratio is 1/10 in the frequency band in which the suppression signal is transmitted.

  However, when the received signal is despread in the mobile phone, the suppression signal having a narrow frequency band as shown in FIG. 7B is reversely spread. Then, the S / N ratio is 10/1 = 10. That is, the power of the suppression signal is 1/10 of the main signal, and the power of the suppression signal is reduced by the spreading factor. For this reason, with the conventional synthesizer method, it is difficult to sufficiently suppress calls on mobile phones. Further, if the output level of the suppression signal is increased in order to increase the level of the suppression signal received by the mobile phone, for example, a transmission signal with power = 20 is generated, the wireless communication suppression device is increased in size.

  Therefore, in the wireless communication suppression device according to the first exemplary embodiment of the present invention, as shown in FIG. 7C, a broadband noise signal is transmitted. In this example, noise with power = 10 and frequency band = 10 is transmitted. Send a signal.

  As a result, even if the received signal is despread in the mobile phone, it is possible to prevent the noise signal from being spread spectrum and the power from being reduced. That is, since the S / N ratio after despreading in the cellular phone is set to 1, that is, the power of the main signal and the noise signal can be made equal, the cellular phone call can be sufficiently suppressed. Moreover, the transmission power required for the suppression radio wave can be reduced as compared with the conventional synthesizer method.

  In addition, in the wireless communication suppression device according to the first exemplary embodiment of the present invention, a single antenna covers a wide band with a configuration in which noise signals of a plurality of frequency bands are synthesized and transmitted from one antenna unit ANT. Therefore, the apparatus can be reduced in size and cost.

  Also, in an antenna device using a balun, in order to suppress reflection and interference of radio waves between the antenna element and the balun, the balun is usually disposed at a right angle with respect to the antenna element. And secure the distance. However, in such a configuration, the thickness of the device increases by the length of the balun.

  On the other hand, in the wireless communication suppressing device according to the first embodiment of the present invention, the balun 12 and the antenna elements E1, E2 are provided so as to face each other. Thereby, the apparatus can be reduced in size and thickness. By providing the radio wave absorber 11A, it is possible to suppress radio wave reflection and interference between the antenna element and the conductive portion of the balun without arranging the balun at a right angle to the antenna element. Transmission characteristics can be obtained.

Next, a usage example of the wireless communication suppression device according to the first embodiment of the present invention will be described.
FIGS. 8A and 8B are diagrams illustrating an example of an attachment position of the wireless communication suppression device according to the first embodiment of the present invention.

  With reference to FIGS. 8A and 8B, the noise signal generation unit GEN and the antenna unit ANT are attached to the inside of the ceiling or the lower surface of the ceiling of a room provided with a plurality of ATM devices. The antenna unit ANT is installed above the operation units of a plurality of ATM devices arranged in a line.

  The height of the ATM device is 1200 mm, and the distance between the centers of the ATM devices is 1000 mm. The height of the suppression target area is set to 1300 mm. The installation height of the antenna unit ANT is set to 2730 mm.

  In the wireless communication suppressing device according to the first embodiment of the present invention, the balun 12 and the antenna elements E1, E2 are provided so as to face each other. Thereby, the antenna part ANT can be reduced in size and thickness, and the reduced-size and thin antenna part ANT is accommodated in a housing K2 different from the noise signal generation part GEN. With such a configuration, it is possible to install only the casing K2 of the antenna unit ANT at a close range of the ATM device. Thereby, without requiring a large remodeling work, it is possible to limit the suppression target area and realize an effective suppression environment. That is, since the suppression radio wave is radiated from the close range of the ATM device, the suppression effect can be obtained with the weak radio wave, and the leakage of the noise signal outside the suppression target area can be prevented.

  Further, in the conventional wireless communication suppression device, one wireless communication suppression device has to be attached to one ATM device. On the other hand, in the wireless communication suppressing device according to the first embodiment of the present invention, the housing K2 is formed so as to surround the balun 12 and the antenna elements E1 and E2 and outputs a noise signal. An opening 73 is formed. With such a configuration, the directivity of the antenna unit ANT can be strengthened. In this case, the beam width can be set to 60 °. Therefore, the suppression target is limited to only the operator of the ATM device, and the It is possible to prevent a person who uses the mobile phone in the back row from being disturbed. Since, for example, six ATM devices can be included in the inhibition target area by one wireless communication inhibition device 101, the number of installed wireless communication inhibition devices can be reduced.

  FIG. 9 is a diagram illustrating an example of a configuration for concealing and attaching the wireless communication suppression device according to the first embodiment of the present invention.

  Referring to FIG. 9, noise signal generation unit GEN and antenna unit ANT, that is, casings K1 and K2, are housed in casing K3 side by side in the vertical direction. The casings K1 and K2 are, for example, 150 mm long, 150 mm wide, and 10 mm wide. The casing K3 is, for example, 300 mm long, 200 mm wide, and 20 mm wide. A power supply line and an external control signal line are connected to the noise signal generation unit GEN.

  FIGS. 10A to 10C are diagrams illustrating an example of concealment attachment of the wireless communication suppression device according to the first embodiment of the present invention.

  As the installation environment of ATM equipment, such as convenience store, shopping center, unattended ATM in front of the station, etc., when ATM equipment is installed in an open area without an ATM booth, only one ATM equipment is installed, and A case where a plurality of ATM devices are installed apart from each other can be considered.

  In the wireless communication suppression device according to the first embodiment of the present invention, the antenna unit ANT can be reduced in size and thickness because the antenna unit ANT has the above-described structure. Even in the case where the upper planar structure does not exist, the attachment can be easily performed.

  That is, referring to FIG. 10A, as shown in FIG. 9, a small and thin unit incorporating a wireless communication suppression device is attached to a service box of an ATM device.

  With reference to FIG.10 (b), the wireless communication suppression apparatus 101 is incorporated in a simple blindfold board, and this simple blindfold board is additionally installed in the side of an ATM apparatus.

  By the method as shown in FIGS. 10A and 10B, the wireless communication suppressing device can be attached without an existing blindfold.

  Referring to FIG. 10 (c), wireless communication suppression device 101 is incorporated inside a “blind panel” provided on the side of the operation unit of the ATM device.

  The installation method as described above can minimize the construction cost required for installation. Further, since the user of the ATM device cannot know the existence of the wireless communication suppression device, it is effective for crime prevention.

  Further, in the wireless communication suppression device according to the first embodiment of the present invention, the wireless communication suppression device is reduced in size and thickness to increase the degree of freedom of installation location and to be installed at an effective location for ATM equipment. Can do.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Second Embodiment>
The present embodiment relates to a wireless communication suppression device having an additional antenna unit compared to the wireless communication suppression device according to the first embodiment. The contents other than those described below are the same as those of the wireless communication suppressing apparatus according to the first embodiment.

  FIG. 11 is a functional block diagram showing the configuration of the wireless communication inhibiting device according to the second embodiment of the present invention.

  Referring to FIG. 11, wireless communication suppression apparatus 102 includes a noise signal generation unit GEN and antenna units ANTA and ANTB. The noise signal generator GEN includes a noise generator 1, a distributor 2, BPF (band pass filter) banks 3A, 3B, 3C, 3D, variable attenuators 4A, 4B, 4C, 4D, and a synthesizer 5. , Level setting devices 6A and 6B, RF-AMPs 7A and 7B, and a distributor 8.

  The wireless communication suppression device 102 further includes a housing K1 and housings K2A and K2B, cables CBLA and CBLB that connect the housing K1 and the housings K2 and K2B, RF connectors CN1A and CN1B, and an RF connector CN2A. , CN2B and a power connector CN3. The noise signal generation unit GEN is accommodated in the housing K1. The RF connectors CN2A and CN2B and the power connector CN3 are attached to the housing K1. Antenna portions ANTA and ANTB are housed in housings K2A and K2B, respectively, and RF connectors CN1A and CN1B are attached to housings K2A and K2B, respectively.

  The distributor 8 distributes the noise signal synthesized by the synthesizer 5, that is, branches the noise signal and outputs it to the level setting devices 6A and 6B.

  Level setting devices 6A and 6B adjust and output the level of the noise signal distributed by distributor 8 based on the external control signal.

  The RF-AMPs 7A and 7B amplify the noise signals received from the level setting devices 6A and 6B, respectively, and output the amplified signals to the antenna units ANTA and ANTB via the RF connectors CN2A and CN2B and the cables CBLA and CBLB, respectively. The cables CBLA and CBLB transmit the noise signals output from the RF-AMPs 7A and 7B to the RF connectors CN1A and CN1B as unbalanced signals, respectively.

  The antenna units ANTA and ANTB emit noise signals from the RF-AMPs 7A and 7B received by the RF connectors CN1A and CN1B to different areas as suppression radio waves.

Next, a usage example of the wireless communication suppression device according to the second exemplary embodiment of the present invention will be described.
FIGS. 12A and 12B are diagrams illustrating an example of a mounting position of the wireless communication suppression device according to the second embodiment of the present invention.

  Referring to FIGS. 12A and 12B, noise signal generation unit GEN and antenna units ANTA and ANTB are attached to the interior of the ceiling or the lower surface of the ceiling in a room where a plurality of ATM devices are provided. The antenna units ANTA and ANTB are installed above the operation units of a plurality of ATM devices arranged in a row.

  As described above, in the wireless communication suppression device according to the second embodiment of the present invention, a noise signal can be distributed from one noise signal generation unit GEN to a plurality of antenna units ANT, so that one noise signal generation is performed. A larger number of ATM devices can be included in the suppression target area simply by preparing the part GEN. Thereby, installation cost can be reduced and installation space can be reduced.

  Further, the suppression radio wave emission range per antenna unit ANT is reduced, that is, in the suppression target area by one antenna unit ANT, a smaller number of ATM devices than the wireless communication suppression device 101, in this example, three ATM devices. Can be included. Thereby, in addition to restricting the suppression target area to only the operator of the ATM device, it is possible to more reliably prevent the call of the person who uses the mobile phone in the back row of the operator of the ATM device.

  FIGS. 13 and 14 are diagrams showing another example of the attachment position of the wireless communication suppressing device according to the second embodiment of the present invention.

  With reference to FIG. 13 and FIG. 14, the radio | wireless communication suppression apparatus 102 may be the structure provided with three or more antenna parts ANT. That is, the housing K2 of each antenna unit ANT is provided between the operation units of a plurality of ATM devices arranged in a line.

  In addition, since the antenna unit ANT has the structure as described in the first embodiment, the antenna unit ANT can be reduced in size and thickness. Therefore, the “blind” provided on the side of the operation unit of the ATM device. A small and thin antenna portion ANT can be incorporated inside the “panel (blindfold plate)” (ANT (B) in FIG. 14). Alternatively, the antenna unit ANT can be incorporated in the service shelf (ANT (C) in FIG. 14).

  Since other configurations and operations are the same as those of the wireless communication suppression device according to the first embodiment, detailed description thereof will not be repeated here.

  Next, another embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

<Third Embodiment>
The present embodiment relates to a wireless communication suppression device in which an antenna element is changed as compared with the wireless communication suppression device according to the first embodiment. The contents other than those described below are the same as those of the wireless communication suppressing apparatus according to the first embodiment.

FIG. 15 is a diagram illustrating a configuration of a wireless communication suppression device according to the third embodiment of the present invention.
Referring to FIG. 15, antenna unit ANT includes antenna elements E3 and E4 instead of antenna elements E1 and E2, as compared with antenna unit ANT according to the first embodiment of the present invention. Each of the antenna elements E3 and E4 is a crescent-shaped plate-like member, and is provided extending in substantially the same plane. The antenna elements E3 and E4 are aligned in the vertical direction so that the orientation of the crescent opening is opposite. The antenna elements E3 and E4 output a noise signal by circular polarization.

  In the wireless communication suppression device, when an antenna that outputs linearly polarized waves is used like a normal dipole antenna, the extending direction of the antenna of the wireless communication suppressing device is parallel to the extending direction of the antenna of the mobile phone. Sometimes, a mobile phone can receive a noise signal satisfactorily. However, when the extending direction of the antenna of the wireless communication suppressing device intersects the extending direction of the antenna of the mobile phone, the mobile phone receives the linearly polarized wave from the wireless communication suppressing device in an inclined state. The deterrence effect of wireless communication is reduced.

  In contrast, in the wireless communication suppressing device according to the third embodiment of the present invention, since antenna elements E3 and E4 output circularly polarized waves, the positional relationship between antenna elements E3 and E4 and a mobile phone is concerned. Therefore, the mobile phone can receive a noise signal at a certain level. Thereby, the fall of the suppression effect of radio | wireless communication can be prevented.

  Also, even if the noise radio wave output from the wireless communication suppression device is reflected and enters the wireless communication suppression device, the direction of the output radio wave and the direction of the reflected radio wave are reversed. And good transmission characteristics can be obtained.

  Since other configurations and operations are the same as those of the wireless communication suppression device according to the first embodiment, detailed description thereof will not be repeated here.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 Noise generator, 2 distributor, 3A, 3B, 3C, 3D BPF (band pass filter) bank, 4A, 4B, 4C, 4D variable attenuator, 5 combiner, 6, 6A, 6B level setter, 7, 7A, 7B RF-AMP, 8 distributor, 11A, 11B radio wave absorbing member, 12 balun, 61, 62 apex, 63, 64 end, 71 outer periphery, 72 bottom surface, 73 opening, 74 protective film, 101, 102 wireless communication suppression device, LN feed line, K1, K2, K2A, K2B, K3 housing, CBL, CBLA, CBLB cable, CN1, CN1A, CN1B, CN2, CN2A, CN2B RF connector, CN3 power connector, ANT, ANTA , ANTB antenna, GEN noise signal generator, E1, E2, E3, E4 antenna elements, S1, S2 main surface.

Claims (10)

A wireless communication suppression device for suppressing wireless communication of a wireless communication device in a predetermined area,
A noise generator for generating a noise signal;
A first distributor for distributing the noise signal generated by the noise generator;
Receiving each of the noise signals distributed by the first distributor, attenuating a component outside a predetermined frequency band of the noise signal, and a plurality of bandpass filters having different predetermined frequency bands;
A combiner for combining a plurality of the noise signals that have passed through the plurality of bandpass filters;
An antenna unit for outputting the noise signal combined by the combiner to the predetermined area;
The noise signal output from the antenna unit has a frequency spectrum that is uniformly distributed in each of the predetermined frequency bands,
The antenna unit is
A plate-like line member having a conductive line for transmitting the noise signal synthesized by the combiner;
Including a plate-like antenna element electrically connected to the conductive line,
The line member and the antenna element are provided to face each other,
The wireless communication suppression device further includes a housing for accommodating the line member and the antenna element,
The casing is formed so as to surround the line member and the antenna element, and an opening for outputting the noise signal is formed,
The line member, said that the antenna element is provided opposite the opening, radio communications apparatus for suppressing. The antenna unit further includes
The wireless communication suppressing device according to claim 1 , comprising a radio wave absorbing member provided between the antenna element and the line member. The antenna unit further includes
Including a radio wave absorbing member provided between the line member and the housing, a wireless communication inhibiting apparatus according to claim 1. A wireless communication suppression device for suppressing wireless communication of a wireless communication device in a predetermined area,
A noise generator for generating a noise signal;
A first distributor for distributing the noise signal generated by the noise generator;
Receiving each of the noise signals distributed by the first distributor, attenuating a component outside a predetermined frequency band of the noise signal, and a plurality of bandpass filters having different predetermined frequency bands;
A combiner for combining a plurality of the noise signals that have passed through the plurality of bandpass filters;
An antenna unit for outputting the noise signal combined by the combiner to the predetermined area;
The noise signal output from the antenna unit has a frequency spectrum that is uniformly distributed in each of the predetermined frequency bands,
The antenna unit is
A conductive line for transmitting the noise signal synthesized by the synthesizer;
Including a plate-like first antenna element and a second antenna element electrically connected to the conductive line;
The wireless communication suppression device further includes a coaxial line for transmitting the noise signal combined by the combiner as an unbalanced signal to the conductive line,
Before Kishirubeden line is said to convert the unbalanced signal to a balanced signal transmitted to the first antenna element and the second antenna element, radio communications apparatus for suppressing. A wireless communication suppression device for suppressing wireless communication of a wireless communication device in a predetermined area,
A noise generator for generating a noise signal;
A first distributor for distributing the noise signal generated by the noise generator;
Receiving each of the noise signals distributed by the first distributor, attenuating a component outside a predetermined frequency band of the noise signal, and a plurality of bandpass filters having different predetermined frequency bands;
A combiner for combining a plurality of the noise signals that have passed through the plurality of bandpass filters;
An antenna unit for outputting the noise signal combined by the combiner to the predetermined area;
The noise signal output from the antenna unit has a frequency spectrum that is uniformly distributed in each of the predetermined frequency bands,
The wireless communication suppression device further includes:
A first housing and a second housing;
A cable connecting the first housing and the second housing;
The noise generator, the first distributor, the plurality of bandpass filters, and the combiner are housed in the first housing,
The antenna unit is accommodated in the second housing, radio communications apparatus for suppressing. The wireless communication suppression device according to claim 5 , wherein the second casing is provided above an operation unit of an ATM (Automated Teller Machine) device. The wireless communication suppression device according to claim 5 , wherein the first housing and the second housing are provided on a side of an operation unit of an ATM device. A wireless communication suppression device for suppressing wireless communication of a wireless communication device in a predetermined area,
A noise generator for generating a noise signal;
A first distributor for distributing the noise signal generated by the noise generator;
Receiving each of the noise signals distributed by the first distributor, attenuating a component outside a predetermined frequency band of the noise signal, and a plurality of bandpass filters having different predetermined frequency bands;
A combiner for combining a plurality of the noise signals that have passed through the plurality of bandpass filters;
An antenna unit for outputting the noise signal combined by the combiner to the predetermined area;
The noise signal output from the antenna unit has a frequency spectrum that is uniformly distributed in each of the predetermined frequency bands,
The wireless communication suppression device includes a plurality of the antenna units, and
A first housing and a plurality of second housings;
A second distributor for distributing the noise signal combined by the combiner;
A plurality of cables for connecting the first housing and the plurality of second housings, respectively, and transmitting the noise signals distributed by the second distributor to the plurality of antenna units, respectively; With
The noise generator, the first distributor, the second distributor, the plurality of bandpass filters, and the combiner are housed in the first housing,
Wherein the plurality of antenna portions are respectively housed in the second housing of said plurality, radio communications apparatus for suppressing. The wireless communication suppression device according to claim 8 , wherein the plurality of second housings are respectively provided between operation units of a plurality of ATM devices arranged in a line. A wireless communication suppression device for suppressing wireless communication of a wireless communication device in a predetermined area,
A noise generator for generating a noise signal;
A first distributor for distributing the noise signal generated by the noise generator;
Receiving each of the noise signals distributed by the first distributor, attenuating a component outside a predetermined frequency band of the noise signal, and a plurality of bandpass filters having different predetermined frequency bands;
A combiner for combining a plurality of the noise signals that have passed through the plurality of bandpass filters;
An antenna unit for outputting the noise signal combined by the combiner to the predetermined area;
The noise signal output from the antenna unit has a frequency spectrum that is uniformly distributed in each of the predetermined frequency bands,
The antenna unit is
A conductive line for transmitting the noise signal synthesized by the synthesizer ;
A plate-like first antenna element and a second antenna element electrically connected to the conductive line ;
Each of the first antenna element and the second antenna element is a crescent-shaped plate-like member, and extends in substantially the same plane so that the directions of the openings of the crescent moon are opposite to each other. It provided Te, and outputs to the predetermined area of the noise signal synthesized by circularly polarized by the synthesizer, radio communications apparatus for suppressing.

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