Technical solutions

1. Project background

With the rapid development of electronic communication technology, the hidden dangers that follow have become more and more obvious. There are more and more incidents of terrorist organizations, ethnic separatists, and criminals using diversified high-tech communication products to commit crimes. They are easy to use the market. Bought, cheap simple remote control devices, various communication terminal equipment (mobile phones, satellite phones, network equipment, etc.) make remote control bombs to threaten.

Therefore, the frequency jammer is an irreplaceable equipment for guarding, EOD missions, special site secrecy, etc., that is, the frequency jammer can carry out full-band electromagnetic interference to the area where the fleet, buildings and suspicious explosives are located, so that all the wireless remote control device and wireless communication equipment cannot work.

2. Product features

Ø 1) Seamless coverage of 20-6000MHz frequency band

All wireless communication devices in the frequency band can be shielded to prevent normal communication or remote control, effectively ensuring the safety of the area.

Ø 2) High transmit power to ensure interference effect;

Continuous emission average power>1000W, power consumption average power>4500W.

Ø 3) White noise + digital fast frequency hopping + analog phase modulation mode intelligent signal waveform generation

The combination of frequency scanning and white noise can form a seamless electromagnetic shielding wall in both the time domain and the frequency domain, shielding any analog and digital wireless remote control devices. The traditional sweep source, such as SDR, DDS technology, the interference signal generated by the sweep source has only one frequency point at a certain time, which forms an electromagnetic shielding network with many gaps (similar to meshes) in the time domain and the frequency domain. , So it is very likely that the narrow code length wireless remote control signal will be missed.

Time-spectrum of sweep source (possible code leakage)

Time-spectrum of an instantaneous UWB source generated by frequency sweep + white noise

Ø 4) Intelligent information human-computer interaction system

(Portable device control table, for reference only)

The console is equipped with a touchable LCD screen, through the LCD screen, you can set the frequency range or turn off some frequency bands (for different tasks or reserve the communication frequency band) in real time on the spot, without the need to connect to a computer to load. For some occasions, it is necessary to retain the communication window or for certain tasks only to shield certain specific frequency ranges. For example, the unit’s communication frequency window needs to be retained during the EOD process, and the mobile communication frequency is only required to be shielded at the scene of a mass incident, and a preset is required. Key-style shortcut buttons.

With complete equipment status display and intelligent judgment of on-site use effect, it can help operators judge the working status of equipment, and can diagnose various equipment abnormal conditions to avoid serious consequences in the case of equipment failure.

Ø 5) The modules are fully independent design and installation, high reliability and easy to maintain and upgrade

Modules and upgrade interfaces can be quickly added, such as upgrading 5G communication interference.

Ø 6) Multi-task occasion application

It is used for the transfer or disposal of suspicious explosives by EOD personnel; the security work of important personnel's activities; the security of the moving fleet; the cutting off of communication between dangerous personnel; the confidential work of important meeting places.

3. Main Parameter

Ø 1) Shielding distance:

a) When the mobile communication terminal receives a level ≤ -75dBm (2, 3G), the effective sealing radius should be greater than or equal to 100m, and the mobile communication terminal is effective when the receiving level ≤ -95dBm (4/5G) The sealing control radius should be greater than or equal to 100m, and the mobile communication terminal should not succeed in making and receiving communication operations within the effective sealing control radius.

b) Under the condition that the distance between receiving and transmitting of the wireless remote control device is 260m (transmitting power is 30dBm), the effective sealing and controlling radius should be greater than or equal to 100m, and the wireless remote controlling device shall not be controlled remotely within the effective sealing and controlling radius.

c) Under the condition that the distance between the receiver and transmitter is 500m (transmitting power is 30 dBm), the effective sealing radius of the digital walkie-talkie should be greater than or equal to 100m, and the digital walkie-talkie should not be able to communicate normally within the effective sealing and controlling radius.

d) When the distance between the receiving and transmitting devices of Bluetooth and WIFI is 20 m (transmitting power is 15dBm), the effective sealing and controlling radius should be greater than or equal to 100 m, and normal communication should not be possible within the effective sealing and controlling radius.

e) The remote control distance between the drone and the drone: when the height is 100 meters and the horizontal distance is 100 meters, the effective sealing and controlling radius distance is 1000 meters

Ø 2) Large transmission power: continuous transmission average power>1000W, power consumption average power>4500W.

Ø 3) Seamlessly cover the frequency band in the range of 20-6000MHz, shield all wireless remote control equipment, including toy remote control, car remote control, FM radio, wireless data transmission, wireless control, walkie-talkie, GSM mobile phone, CDMA mobile phone, 3G mobile phone, 4/5G Mobile phone, WIFI, Bluetooth, BP machine, PHS, UAV, etc.

Ø 4) Power supply voltage: AC220V;

Ø 5) Cabinet design: power amplifier system, interference signal source system and power supply system are integrated in a complete cabinet. The cabinet can adapt to various vibration environments during vehicle driving and transportation. The vibration isolator is used as the vibration isolation device of the cabinet equipment. The vibration isolation device can ensure the normal operation of the equipment during the driving of the vehicle, while being firm and reliable, easy to disassemble and assemble, and can be equipped with rollers. The equipment adopts a drawer type chassis for quick assembly and disassembly, and uses precision slide rails to install and fix. The beams and columns inside the cabinet should be conductive, and the surface treatment should be color-plated zinc or white zinc, without plastic spraying. All power interfaces are connected by military aviation connectors.

4. Main features

1) Anti-explosion function: when the device is set to full frequency coverage mode, all radio signals can be sealed, controlled and shielded;

2) Sealing and control of mobile communication terminals: When the device is set to the full network mobile phone mode, all mobile communication terminals can be sealed, controlled and shielded;

3) UAV countermeasure function: When the device is set to the UAV return or emergency landing mode, it has the function of driving away the UAV and emergency landing in place;

4) Window opening function: When the device is set to touch screen control mode, any frequency band can be opened and closed separately. For example, in the full frequency coverage mode, the intercom frequency band can be turned off interference operation;

5) Remote control function: The device is equipped with a remote control terminal, equipped with a 10-meter transmission cable, which can remotely control the on and off and functional operation of the jammer;

6) Interference mode fast switching function: The control terminal is equipped with multiple physical buttons, which can quickly switch between full frequency, typical, mobile phone, UAV return/force landing and other interference modes;

7) Control terminal display and touch function: The control terminal is equipped with a 7-inch LCD screen and has a touch function, which can control and open the frequency band by touching and pressing the corresponding area;

8) Status display function: it can display the working status of each frequency band (antenna standing wave, power, frequency, voltage, temperature);

9) Real-time frequency adjustment function: During equipment operation, the working frequency range can be adjusted in real time through the control terminal;

10) Custom interference target function: the interference target frequency can be customized by controlling the terminal touch screen;

11) Voice alarm function: The control terminal has a voice alarm function. When the antenna, power, voltage, and temperature are abnormal, it can emit a voice prompt;

12) Real-time monitoring of equipment status: The control terminal can display the interference frequency range, power, internal temperature of the equipment, antenna status, and voltage status in real time. When the data is abnormal, the terminal system will give a prompt;

13) Standing wave protection function: if the antenna is not connected, damaged or connected incorrectly, the terminal system will give a prompt and turn off the output of the power amplifier module (no power output) when the antenna is not connected to prevent module damage;

14) Sectional control function: each section of the device has a separate switch, which can be controlled separately according to needs, and can work in sub-frequency bands or full-frequency bands;

16) One-key switch function: After the device is powered on, the start button can be used to turn on or off the device with one key.

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