CN213846689U - Non-guide multi-standard signal blocking equipment - Google Patents

Abstract

The utility model belongs to radio cheating prevention and control system field relates to a non-guide multisystem signal blocking equipment, block module, high frequency blocking module, low frequency transmitting antenna and high frequency transmitting antenna including power module, low frequency, power module blocks the module with the low frequency respectively, high frequency blocks the module and is connected, the low frequency blocks the module and includes 3 low frequency and blocks the submodule piece, and every low frequency blocks the submodule piece and is connected with a low frequency transmitting antenna respectively, the high frequency blocks the module and includes 12 high frequencies and blocks the submodule piece, and every high frequency blocks the submodule piece and is connected with a high frequency transmitting antenna respectively. The utility model discloses take non-guide to block, be convenient for network deployment and maintenance, saved the time and the cost expenditure of engineering construction, can solve simultaneously blocking of cell-phone signals such as three big operators 2G, 3G, 4G, 5G and 2.4G Wi-Fi, 5.8G Wi-Fi (5170MHz ~ 5330MHz, two frequency channels of 5725MHz ~ 5850 MHz), effectively prevented to utilize mobile communication to cheat.

Description

Non-guide multi-standard signal blocking equipment

Technical Field

The utility model belongs to radio cheating prevention and control system field relates to a non-guide multisystem signal blocking equipment.

Background

In important examinations such as general college entrance examination, adult college entrance examination, student examination, English four-six level examination and various professional qualification examinations, the radio cheating prevention and control system plays a certain role in maintaining fairness and justice of the examinations, so that the examination environment is purified. With the rapid development of 5G technology, 2G, 3G, 4G technologies have been unable to meet the blocking requirements at the present stage, and the increased 5G shielding causes the cost of the cheating prevention and control device to rise due to the increase of hardware cost. Therefore, development of a signal blocking device suitable for the 5G technology is continued.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a non-guide multisystem signal blocking equipment solves the problem that current equipment cost is high, wiring construction cycle is long.

The technical problem to be solved is as follows:

the problem of antenna placement is solved in appearance, and the influence on the psychology of a test taker is reduced by adopting a mode of antenna arrangement; in the blocking mode, aiming at solving the problems of cost improvement and construction time increase caused by guide type blocking, autonomous non-guide type blocking is adopted; the blocking system is to block interphone signals with working frequency bands of 135 MHz-174 MHz, 216 MHz-280 MHz and 400 MHz-470 MHz (character type and voice type information related to the frequency bands can be blocked), and block mobile phone signals such as 2G CDMA, GSM, DCS, 3G CDMA2000, WCDMA, TD-SCDMA, 4G FDD-LTE, TD-LTE, mobile, Unicom, telecom 5G communication and the like, and 2.4G Wi-Fi and 5.8G Wi-Fi in real time.

(II) realization process of non-guide multi-standard signal blocking equipment is as follows:

a non-guide multi-standard signal blocking device comprises a power supply module, a low-frequency blocking module, a high-frequency blocking module, low-frequency transmitting antennas and high-frequency transmitting antennas, wherein the power supply module is respectively connected with the low-frequency blocking module and the high-frequency blocking module, the low-frequency blocking module comprises 3 low-frequency blocking sub-modules, each low-frequency blocking sub-module is respectively connected with one low-frequency transmitting antenna, the input end of each low-frequency blocking sub-module is connected with the output end of the power supply module, and the output end of each low-frequency blocking sub-module is connected with the corresponding low-frequency transmitting antenna; the high-frequency blocking module comprises 12 high-frequency blocking sub-modules, and each high-frequency blocking sub-module is respectively connected with one high-frequency transmitting antenna; the input end of each high-frequency blocking sub-module is connected with the output end of the power supply module, and the output end of each high-frequency blocking sub-module is connected with the corresponding high-frequency transmitting antenna;

each low-frequency blocking sub-module is provided with a power supply interface and a control interface, the power supply interfaces of 3 low-frequency blocking sub-modules are sequentially connected end to end, the control interfaces of 3 low-frequency blocking sub-modules are sequentially connected end to end, and the tail end of the control interface of one low-frequency blocking sub-module is pulled up to a high level;

each high-frequency blocking submodule is provided with a power supply interface and a control interface, 12 high-frequency blocking submodules are divided into an upper group and a lower group, each group is provided with 6 high-frequency blocking submodules, the power supply interfaces of the 6 high-frequency blocking submodules of each group are sequentially connected end to end, the control interfaces of the 6 high-frequency blocking submodules of each group are sequentially connected end to end, and the tail end of the control interface of one high-frequency blocking submodule in each group is pulled up to a high level.

Further, the power supply module is a 200W AC/DC module, the input end of the power supply module is connected with 220V mains supply through a three-core 0.75A power line, the output end of the power supply module adopts two paths of 12V output to be respectively connected with the power supply input ends of each high-frequency blocking sub-module and each low-frequency blocking sub-module, and 12V direct-current power supplies are provided for each high-frequency blocking sub-module and each low-frequency blocking sub-module.

Furthermore, each low-frequency blocking sub-module comprises a power supply and interface circuit I, a 555 time-base circuit I, a voltage-controlled oscillation circuit I, a buffer amplification circuit and a push amplification circuit; the input end of the power supply and interface circuit I is connected with the output end of the power supply module, and the low voltage output by the output end of the power supply and interface circuit I is respectively connected with the 555 time-base circuit I, the voltage-controlled oscillation circuit I, the buffer amplifying circuit and the push amplifying circuit to provide the voltage required by the circuit; the 555 time base circuit I generates sawtooth waves with different amplitudes and different oscillation periods, the sawtooth waves are input into the voltage-controlled oscillation circuit I, the voltage-controlled oscillation circuit I generates sweep frequency signals with different starting frequencies and cut-off frequencies, and then the sweep frequency signals are subjected to two-stage amplification by the buffer amplification circuit and the push amplification circuit and then transmitted by the low-frequency transmitting antenna.

Furthermore, each high-frequency blocking submodule comprises a power supply and interface circuit II, a 555 time-base circuit II, a voltage-controlled oscillation circuit II and a power amplification circuit; the input end of the power supply and interface circuit II is connected with the output end of the power supply module, and the low voltage output by the output end of the power supply and interface circuit II is respectively connected with the 555 time base circuit II, the voltage-controlled oscillation circuit II and the power amplification circuit to provide the voltage required by the circuit; the 555 time base circuit II generates sawtooth waves with different amplitudes and different oscillation periods, the sawtooth waves are input into the voltage-controlled oscillation circuit II, the voltage-controlled oscillation circuit II generates sweep frequency signals with different initial frequencies and cut-off frequencies, and then the sweep frequency signals are amplified by the power amplification circuit and transmitted by the high-frequency transmitting antenna.

Further, the low-frequency blocking module is divided into 3 working frequency bands according to the blocking function: 135MHz to 174MHz in VHF frequency band, 216MHz to 280MHz in UHF frequency band and 400MHz to 470MHz in UHF frequency band; the 3 working frequency bands respectively correspond to the 3 low-frequency blocking sub-modules, and each low-frequency blocking sub-module works independently.

Further, the high-frequency blocking module is divided into 12 working frequency bands according to the blocking function: 866 MHz-886 MHz, 925 MHz-960 MHz, 1805 MHz-1920 MHz, 2010 MHz-2170 MHz, 2300 MHz-2390 MHz, 2400 MHz-2483 MHz, 2515 MHz-2675 MHz, 2555 MHz-2655 MHz, 3300 MHz-3600 MHz, 4800 MHz-5000 MHz, 5170 MHz-5330 MHz, 5725 MHz-5850 MHz; the 12 working frequency bands respectively correspond to 12 high-frequency blocking sub-modules, and each high-frequency blocking sub-module works independently; wherein 866 MHz-886 MHz is CDMA frequency band, 925 MHz-960 MHz is GSM frequency band, 1805 MHz-1920 MHz is DCS frequency band, 2010 MHz-2170 MHz is CDMA2000, WCDMA, FDD-LTE frequency band, 2300 MHz-2390 MHz is TD-SCDMA, 2400 MHz-2483 MHz is 2.4G Wi-Fi frequency band, 2555 MHz-2655 MHz is TD-LTE frequency band, 2515 MHz-2675 MHz, 4800 MHz-5000 MHz is mobile 5G frequency band, 3300 MHz-3600 MHz is Unicom, telecom 5G frequency band, 5170 MHz-5330 MHz, 5725 MHz-5850 MHz is 5.8G Wi-Fi frequency band.

Further, the low-frequency transmitting antenna is a rod-shaped omnidirectional passive antenna with 3 different frequency bands, and the high-frequency transmitting antenna is a rod-shaped omnidirectional passive antenna with 12 different frequency bands.

The low-frequency blocking module and the high-frequency blocking module are fixed on the radiating fin, the radiating fin is fixed on the shell, and the mute fan is fixed on the radiating fin to cool the radiating fin.

Furthermore, the low-frequency transmitting antenna and the high-frequency transmitting antenna are arranged in a built-in mode, and the power supply module, the low-frequency blocking module and the high-frequency blocking module are all installed in the machine shell.

(III) the utility model has the positive effects that:

(1) the utility model provides a cheat through intercom, wireless stealthy earphone, bone conduction earphone, wireless digital transmission receiving tool etc. in the examination room.

(2) The utility model provides a blocking of cell-phone signals such as 2G, 3G, 4G, 5G and 2.4G Wi-Fi, 5.8G Wi-Fi (5170MHz ~ 5330MHz, two frequency channels of 5725MHz ~ 5850 MHz) of three big operators, effectively prevented to utilize cell-phone communication to cheat.

(3) The utility model discloses take non-guide formula to block, be convenient for network deployment and maintenance have saved the time and the cost expenditure of engineering construction.

(4) The utility model discloses take the built-in form of antenna, can not exert an influence to examinee's psychology, the examinee's cool and quiet response of being convenient for.

Drawings

Fig. 1 is a block diagram of a circuit structure of the unguided multi-standard signal blocking device of the present invention;

fig. 2 is a block diagram of the low frequency blocking module according to the present invention;

fig. 3 is a block diagram of the high frequency blocking module according to the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In order to solve the problem that current equipment cost is high, wiring construction cycle is long, the utility model provides a non-guide multisystem signal blocking equipment.

Example 1

The non-guided multi-standard signal blocking device of this embodiment, as shown in fig. 1, includes a power module, a low-frequency blocking module, a high-frequency blocking module, a low-frequency transmitting antenna, and a high-frequency transmitting antenna, where the power module is connected to the low-frequency blocking module and the high-frequency blocking module, the low-frequency blocking module includes 3 low-frequency blocking sub-modules, each low-frequency blocking sub-module is connected to one low-frequency transmitting antenna, an input end of each low-frequency blocking sub-module is connected to an output end of the power module, and an output end of each low-frequency blocking sub-module is; the high-frequency blocking module comprises 12 high-frequency blocking sub-modules, and each high-frequency blocking sub-module is respectively connected with one high-frequency transmitting antenna; the input end of each high-frequency blocking sub-module is connected with the output end of the power supply module, and the output end of each high-frequency blocking sub-module is connected with the corresponding high-frequency transmitting antenna; the low-frequency transmitting antenna is a rod-shaped omnidirectional passive antenna with 3 different frequency bands, and the high-frequency transmitting antenna is a rod-shaped omnidirectional passive antenna with 12 different frequency bands. The heat dissipation system comprises a heat dissipation sheet and a low-speed fan, the casing is composed of a casing body and an upper cover, the casing body and the upper cover are made of white PC materials, interference signals can be effectively sent, and emission of electromagnetic wave signals cannot be restrained. The low-frequency blocking module and the high-frequency blocking module are respectively fixed on the radiating fins, the radiating fins are fixed on the shell, and the silent fan is fixed on the radiating fins to cool the radiating fins. The radiating fins are saw-toothed aluminum radiating fins, and three groups of radiating fins are used. Every 6 high-frequency blocking sub-modules of the 12 high-frequency blocking sub-modules are divided into one group, the upper group and the lower group are two, the high-frequency blocking sub-modules are fixed on the two groups of radiating fins, and the two groups of radiating fins are fixed on the white PC shell by self-tapping screws. The 3 low-frequency blocking sub-modules are fixed on a third group of radiating fins, and the third group of radiating fins are fixed on the white PC shell by self-tapping screws. The two mute fans are respectively fixed on the heat radiating fins on which the low-frequency blocking module and the high-frequency blocking module are arranged. The low-frequency transmitting antenna and the high-frequency transmitting antenna are arranged in a built-in mode, and the power supply module, the low-frequency blocking module and the high-frequency blocking module are all installed in the machine shell.

Each low-frequency blocking sub-module is provided with a power supply interface and a control interface, the power supply interfaces of 3 low-frequency blocking sub-modules are sequentially connected end to end, the control interfaces of 3 low-frequency blocking sub-modules are sequentially connected end to end, and the tail end of the control interface of one low-frequency blocking sub-module is pulled up to a high level; each high-frequency blocking submodule is provided with a power supply interface and a control interface, 12 high-frequency blocking submodules are divided into an upper group and a lower group, each group is provided with 6 high-frequency blocking submodules, the power supply interfaces of the 6 high-frequency blocking submodules of each group are sequentially connected end to end, the control interfaces of the 6 high-frequency blocking submodules of each group are sequentially connected end to end, and the tail end of the control interface of one high-frequency blocking submodule in each group is pulled up to a high level.

The power supply module is a 200W AC/DC module, the input end of the power supply module is connected with 220V mains supply through a three-core 0.75A power line, the output end of the power supply module adopts two paths of 12V output to be respectively connected with the power supply input end of each high-frequency blocking submodule and each low-frequency blocking submodule, and 12V direct-current power supplies are provided for each high-frequency blocking submodule and each low-frequency blocking submodule. The power module of the embodiment adopts a single 200W power supply and 12V double-path output, replaces a double-path 150W 12V telephone, and reduces the product cost.

As shown in fig. 2, each low-frequency blocking sub-module includes a power supply and interface circuit I, a 555 time-base circuit I, a voltage-controlled oscillation circuit I, a buffer amplification circuit, and a push amplification circuit; the input end of the power supply and interface circuit I is connected with the output end of the power supply module, and the low voltage output by the output end of the power supply and interface circuit I is respectively connected with the 555 time-base circuit I, the voltage-controlled oscillation circuit I, the buffer amplifying circuit and the push amplifying circuit to provide the voltage required by the circuit; the 555 time base circuit I generates sawtooth waves with different amplitudes and different oscillation periods, the sawtooth waves are input into the voltage-controlled oscillation circuit I, the voltage-controlled oscillation circuit I generates sweep frequency signals with different starting frequencies and cut-off frequencies (namely 3 working frequency bands, 135 MHz-174 MHz, 216 MHz-280 MHz and 400 MHz-470 MHz of UHF frequency bands of VHF frequency bands), and then the sweep frequency signals are transmitted through the low-frequency transmitting antenna after being amplified in two stages by the buffer amplifying circuit and the push amplifying circuit. The low-frequency blocking module is divided into 3 working frequency bands according to the blocking function: 135MHz to 174MHz in VHF frequency band, 216MHz to 280MHz in UHF frequency band and 400MHz to 470MHz in UHF frequency band; the 3 working frequency bands respectively correspond to the 3 low-frequency blocking sub-modules, and each low-frequency blocking sub-module works independently. The 555 time base circuit I is a sawtooth wave generating circuit.

As shown in fig. 3, each high-frequency blocking sub-module includes a power supply and interface circuit II, a 555 time-base circuit II, a voltage-controlled oscillation circuit II, and a power amplification circuit; the input end of the power supply and interface circuit II is connected with the output end of the power supply module, and the low voltage output by the output end of the power supply and interface circuit II is respectively connected with the 555 time base circuit II, the voltage-controlled oscillation circuit II and the power amplification circuit to provide the voltage required by the circuit; the 555 time base circuit II generates sawtooth waves with different amplitudes and different oscillation periods, the sawtooth waves are input into the voltage-controlled oscillation circuit II, the voltage-controlled oscillation circuit II generates sweep frequency signals with different initial frequencies and cut-off frequencies, and then the sweep frequency signals are amplified by the power amplification circuit and transmitted by the high-frequency transmitting antenna. The high-frequency blocking module is divided into 12 working frequency bands according to the blocking function: 866 MHz-886 MHz, 925 MHz-960 MHz, 1805 MHz-1920 MHz, 2010 MHz-2170 MHz, 2300 MHz-2390 MHz, 2400 MHz-2483 MHz, 2515 MHz-2675 MHz, 2555 MHz-2655 MHz, 3300 MHz-3600 MHz, 4800 MHz-5000 MHz, 5170 MHz-5330 MHz, 5725 MHz-5850 MHz; the 12 working frequency bands respectively correspond to 12 high-frequency blocking sub-modules, and each high-frequency blocking sub-module works independently; wherein 866 MHz-886 MHz is CDMA frequency band, 925 MHz-960 MHz is GSM frequency band, 1805 MHz-1920 MHz is DCS frequency band, 2010 MHz-2170 MHz is CDMA2000, WCDMA, FDD-LTE frequency band, 2300 MHz-2390 MHz is TD-SCDMA, 2400 MHz-2483 MHz is 2.4G Wi-Fi frequency band, 2555 MHz-2655 MHz is TD-LTE frequency band, 2515 MHz-2675 MHz, 4800 MHz-5000 MHz is mobile 5G frequency band, 3300 MHz-3600 MHz is Unicom, telecom 5G frequency band, 5170 MHz-5330 MHz, 5725 MHz-5850 MHz is 5.8G Wi-Fi frequency band. The 555 time base circuit II is a sawtooth wave generating circuit.

Each circuit that involves in the non-guide multisystem signal blocking equipment is common circuit among the prior art, the utility model discloses no longer carry out detailed description to the circuit.

The utility model discloses a non-guide multi-standard signal blocking equipment not only satisfies the signal blocking of present domestic 2G CDMA, GSM, DCS, 3G CDMA2000, WCDMA, TD-SCDMA, 4G FDD-LTE, TD-LTE, can also block the 5G cell-phone signal of removal, UNICOM, telecommunication, and to signal blocking such as bluetooth, Wi-Fi signal, intercom; meanwhile, the non-guided blocking mode is flexible in networking, the problems of cost rise and long construction and debugging period of a guided product caused by network wiring are solved, the cost performance is high, and the expenditure cost of engineering purchase is saved.

The foregoing is a more detailed description of the invention, taken in conjunction with the specific preferred embodiments, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of conceiving, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (9)

1. A non-guided multi-standard signal blocking device is characterized in that: the low-frequency blocking module comprises 3 low-frequency blocking sub-modules, each low-frequency blocking sub-module is connected with one low-frequency transmitting antenna, the input end of each low-frequency blocking sub-module is connected with the output end of the power module, and the output end of each low-frequency blocking sub-module is connected with the corresponding low-frequency transmitting antenna; the high-frequency blocking module comprises 12 high-frequency blocking sub-modules, and each high-frequency blocking sub-module is respectively connected with one high-frequency transmitting antenna; the input end of each high-frequency blocking sub-module is connected with the output end of the power supply module, and the output end of each high-frequency blocking sub-module is connected with the corresponding high-frequency transmitting antenna;

each low-frequency blocking sub-module is provided with a power supply interface and a control interface, the power supply interfaces of 3 low-frequency blocking sub-modules are sequentially connected end to end, the control interfaces of 3 low-frequency blocking sub-modules are sequentially connected end to end, and the tail end of the control interface of one low-frequency blocking sub-module is pulled up to a high level;

each high-frequency blocking submodule is provided with a power supply interface and a control interface, 12 high-frequency blocking submodules are divided into an upper group and a lower group, each group is provided with 6 high-frequency blocking submodules, the power supply interfaces of the 6 high-frequency blocking submodules of each group are sequentially connected end to end, the control interfaces of the 6 high-frequency blocking submodules of each group are sequentially connected end to end, and the tail end of the control interface of one high-frequency blocking submodule in each group is pulled up to a high level.

2. The unguided multi-standard signal blocking device of claim 1, wherein: the power supply module is a 200W AC/DC module, the input end of the power supply module is connected with 220V mains supply through a three-core 0.75A power line, the output end of the power supply module adopts two paths of 12V output to be respectively connected with the power supply input end of each high-frequency blocking submodule and each low-frequency blocking submodule, and 12V direct-current power supplies are provided for each high-frequency blocking submodule and each low-frequency blocking submodule.

3. The unguided multi-standard signal blocking device of claim 1, wherein: each low-frequency blocking sub-module comprises a power supply and interface circuit I, a 555 time-base circuit I, a voltage-controlled oscillation circuit I, a buffer amplification circuit and a push amplification circuit; the input end of the power supply and interface circuit I is connected with the output end of the power supply module, and the low voltage output by the output end of the power supply and interface circuit I is respectively connected with the 555 time-base circuit I, the voltage-controlled oscillation circuit I, the buffer amplifying circuit and the push amplifying circuit to provide the voltage required by the circuit; the 555 time base circuit I generates sawtooth waves with different amplitudes and different oscillation periods, the sawtooth waves are input into the voltage-controlled oscillation circuit I, the voltage-controlled oscillation circuit I generates sweep frequency signals with different starting frequencies and cut-off frequencies, and then the sweep frequency signals are subjected to two-stage amplification by the buffer amplification circuit and the push amplification circuit and then transmitted by the low-frequency transmitting antenna.

4. The unguided multi-standard signal blocking device of claim 1, wherein: each high-frequency blocking sub-module comprises a power supply and interface circuit II, a 555 time-base circuit II, a voltage-controlled oscillation circuit II and a power amplification circuit; the input end of the power supply and interface circuit II is connected with the output end of the power supply module, and the low voltage output by the output end of the power supply and interface circuit II is respectively connected with the 555 time base circuit II, the voltage-controlled oscillation circuit II and the power amplification circuit to provide the voltage required by the circuit; the 555 time base circuit II generates sawtooth waves with different amplitudes and different oscillation periods, the sawtooth waves are input into the voltage-controlled oscillation circuit II, the voltage-controlled oscillation circuit II generates sweep frequency signals with different initial frequencies and cut-off frequencies, and then the sweep frequency signals are amplified by the power amplification circuit and transmitted by the high-frequency transmitting antenna.

5. The unguided multi-standard signal blocking device of claim 1, wherein: the low-frequency blocking module is divided into 3 working frequency bands according to the blocking function: 135MHz to 174MHz in VHF frequency band, 216MHz to 280MHz in UHF frequency band and 400MHz to 470MHz in UHF frequency band; the 3 working frequency bands respectively correspond to the 3 low-frequency blocking sub-modules, and each low-frequency blocking sub-module works independently.

6. The unguided multi-standard signal blocking device of claim 1, wherein: the high-frequency blocking module is divided into 12 working frequency bands according to the blocking function: 866 MHz-886 MHz, 925 MHz-960 MHz, 1805 MHz-1920 MHz, 2010 MHz-2170 MHz, 2300 MHz-2390 MHz, 2400 MHz-2483 MHz, 2515 MHz-2675 MHz, 2555 MHz-2655 MHz, 3300 MHz-3600 MHz, 4800 MHz-5000 MHz, 5170 MHz-5330 MHz, 5725 MHz-5850 MHz; the 12 working frequency bands respectively correspond to 12 high-frequency blocking sub-modules, and each high-frequency blocking sub-module works independently; wherein 866 MHz-886 MHz is CDMA frequency band, 925 MHz-960 MHz is GSM frequency band, 1805 MHz-1920 MHz is DCS frequency band, 2010 MHz-2170 MHz is CDMA2000, WCDMA, FDD-LTE frequency band, 2300 MHz-2390 MHz is TD-SCDMA, 2400 MHz-2483 MHz is 2.4G Wi-Fi frequency band, 2555 MHz-2655 MHz is TD-LTE frequency band, 2515 MHz-2675 MHz, 4800 MHz-5000 MHz is mobile 5G frequency band, 3300 MHz-3600 MHz is Unicom, telecom 5G frequency band, 5170 MHz-5330 MHz, 5725 MHz-5850 MHz is 5.8G Wi-Fi frequency band.

7. The unguided multi-standard signal blocking device of claim 1, wherein: the low-frequency transmitting antenna is a rod-shaped omnidirectional passive antenna with 3 different frequency bands, and the high-frequency transmitting antenna is a rod-shaped omnidirectional passive antenna with 12 different frequency bands.

8. The unguided multi-standard signal blocking device of claim 1, wherein: the low-frequency blocking module and the high-frequency blocking module are fixed on the radiating fins, the radiating fins are fixed on the shell, and the fan is fixed on the radiating fins to cool the radiating fins.

9. The unguided multi-mode signal blocking device of claim 8, wherein: the low-frequency transmitting antenna and the high-frequency transmitting antenna are arranged in a built-in mode, and the power supply module, the low-frequency blocking module and the high-frequency blocking module are all installed in the machine shell.

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