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Characteristics of the Radar signature of multi-rotor UAVs

This paper investigates the theoretical Radar Cross Section of multi-rotor Unmanned Air Vehicles (UAVs), their time response and Doppler frequency signature. Anechoic chamber measurements of Multi-Rotor blades are presented and these measurements are used to give a more representative signature. A new radar for detection and discrimination of the Multi-Rotor aircraft is described. Results from radar detections of dynamic Multi-rotor UAVs in flight are then presented.