Analysis Method for Interference between Close-In Weapon System Radars Using Complex-Valued Fields and Received Currents

This paper proposes a method for analyzing the interference between closed-in weapon system radars. To reduce the simulation time, we modeled hundreds of antenna arrays of the transmitting radar as near-field-equivalent sources, with the interference signal received by the radar interpreted using complex-valued fields or currents based on the operating frequency compared with the transmitting radar. The complex values derived from each analysis were used to generate a two-dimensional array manifold matrix. From the perspective of the receiving radar, we identified the direction of maximum interference and the corresponding electric field and current magnitudes in that direction. In addition, by assuming a real operational scenario, we simplified the modeling of the onboard structures around the radar and analyzed the interference between the radars. The simulation results confirmed the influence of onboard structures and that the proposed method of analyzing radar interference can reflect both line-of-sight (LOS) and non-line-of-sight (NLOS) scenarios.