A study on dynamic threshold for the crosstalk reduction in frequency-modulated radars

This paper presents the preliminary results of a new study aimed at minimizing the crosstalk effect in the receiver of a frequency-modulated radar. The main idea consists of performing a calibration of the system in absence of targets by analyzing the intermediate-frequency signal at the output of the radar receiver to compute a variable threshold according to the crosstalk amplitude. An electromagnetic analysis of the antenna matching networks has been performed since the system operates in a wider frequency range than the network performance specifications. Experimental results are presented to confirm the feasibility of the proposed approach due to the good agreement with the expected behavior.