Power Spectral Density of the Received Signal in Noise Radar at the Presence of Antennas Leakage

During range calibration measurements of Noise Radar, a periodic structure in the Power Spectral Density of the radar receiver has been detected. We showed that this effect is due to summation of the radar returns and transmit/receive antenna leakage signals when a reflector is placed in the near zone, but beyond the coherence length of the transmitted noise signal. Theoretical consideration of the effect and comparison of the theoretical results with the experimental ones are presented.