In recent years, the uav market has been growing rapidly. With the large-scale research and development and production of dji, jifei, zero intelligent control and other manufacturers, commercial uavs have become more and more cost-effective and popular. However, domestic regulation of drones, especially the black flying drones, is still in a blank state. About 90% of the micro uavs flying in the air fly black, which causes great hidden dangers to air supervision and air safety.

There have been hundreds of incidents in the second half of 2016 alone, such as flights being forced to stop and large events falling down and injuring people. Recent incidents involving flights in Canada and high-speed black flights in China have revealed a number of hidden safety risks. Facing the blank of black flying uav regulation, only strong countermeasures can be taken to ensure the safety of the air.
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Most uav jammers can jam all GNSS satellite positioning signals, including GPS/ beidou/glonass/Galileo; At the same time, the ISM 2.4g and ISM 5.8g frequency band commonly used by uavs can be shielded from interference, forcing the remote control of uavs, image transmission and positioning, and signal interruption, so as to achieve the effect of forced landing/turning back/hovering.

Wireless communication must ensure enough load - to - dry ratio (SNR) to effectively receive and complete the communication. The communication signal jammer is to destroy the receiving condition of the uav ，cut off the communication connection between the uav and the remote transmission by generating the interference signal of the same frequency as that received by the uav. Achieve the effect of jamming communication. The interference power is certain and the shielding radius of the unblocked space is determined by path attenuation and remote control signal level.

Will it interfere with the normal work of other electronic devices: the electromagnetic signals emitted by the uav jammer completely fall within the working frequency band stipulated by the state, which will only shield the communication
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Harmful to human body and mobile phone: test data show that the electromagnetic signal intensity emitted by uav jammers is very weak, which is far from harmful to human body. At the same time, just interfering with the forward signal prevents the drone from establishing contact with the remote control operator, so there will be no damage to the drone itself at all.