The LW-R20-K low altitude unmanned aerial vehicle early warning radar adopts technologies such as pitch active antenna high-efficiency gallium nitride transceiver components, DBF simultaneous multi beam reception, azimuth machine scanning, and structural integration design. It is a developed equipment that can detect and locate unmanned aerial vehicles. It has the characteristics of small size, light weight, high accuracy, and easy use. Can be used for air surveillance in key locations such as nuclear power plants, oil depots, prisons, airports, important government agencies, military units, borders, etc.