Ku-band medium-range single-faced array radar 1, Overview The DD-R21 Ku-band medium-range monopolar array radar employs a fully solid-state, fully coherent, and pulse Doppler system, enabling all-weather detection and early warning of "low, small, slow" targets. Utilizing machine learning and AI recognition technologies based on "micro-Doppler signatures" and "flight path features," it achieves effective detection and classification of targets including drones, ligh