Analysis of Spectrum Signatures from Rotating Blades of Small Drone

The periodical Doppler spectrum signatures originated from rotating blades of multi-rotor drones are promising features for their classification in radar systems. The structure of the spectrum signature varies not only with the drone types but also with the parameters of the illuminating wave and the radar geometry. This paper focuses on theoretical and experimental analysis of spectrum signatures from rotating blades made of different materials for different frequency bands, polarizations, and bistatic angles.