Evaluation method for the receiver sensitivity requirement of CATR with single reflector

Based on the Lorentz reciprocity theorem, a novel method was proposed for evaluating the receiver sensitivity requirement of compact antenna test range (CATR) with single reflector. Through calculating the near fields that excited by the feed of the CATR and scattered by the standard calibration sphere respectively, and considering the efficiency of the reflector and the transmit power of the feed, the receiver sensitivity requirement in the testing process could be obtained. This method could reflect the influences of radar cross section (RCS) of the target, working frequency, the property and position of the feed, the size, sawtooth structure and edge diffraction of the reflector, the center position of quiet zone. This method was used to evaluate the receiver sensitivity requirement of CATR in microwave anechoic chamber of Beijing University of Aeronautics and Astronautics, and the evaluation result was compared with the experiment result, then the validity of this method could be verified.