1. Active radar as an Anti-UAV Defence system representative in the UK (AUDS), its working principle is to launch Ku band scanning probe (similar to the bat positioning), it can detect several kilometers or even 10 kilometers outside of the unmanned aerial vehicle (uav), but may affect satellite communications and satellite navigation. In rainy and foggy days, the band is also easily consumed by water vapor
2. For civilian consumption level drones, the passive radar will be more effective, and it can realize the undetectable detection of uav signals within a kilometer range. The passive radar will not transmit any radio waves, it will not affect the surrounding electromagnetic environment, and it is suitable to be deployed in any area of the airport clearance area. With the development of technology, Anti-drone defense system will be more perfect.
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