Analysis of specular reflection effect of bistatic clutter scattering coefficient based on monostatic-bistatic equivalence theorem

作者：Yi-Xiang Wang, Lingyu Wang, Zihao Zou, Xin Lin, Lang Xia, Gengze Qin, Jingtao Ma, Penghui Huang · 发表于：IET conference proceedings. · 年份：2026 · DOI：10.1049/icp.2026.1148 · 研究领域：Radar Systems and Signal Processing、Advanced SAR Imaging Techniques、Electromagnetic Scattering and Analysis

As for the weak and small moving target detection in a spaceborne bistatic radar system, the target detection performance is significantly compromised by two primary factors: the extended detection range and the diminutive radar cross-section (RCS) of targets, which collectively result in substantially attenuated echo signals. Previous studies have demonstrated that employing a large bistatic angle configuration can effectively enhance the surface scattering coefficient of targets, thereby augmenting the target signal energy. Building upon this principle, this study establishes a bistatic clutter scattering coefficient model derived from the monostatic-bistatic equivalence theorem and fundamental electromagnetic scattering theory. Numerical simulations reveal that when the azimuth bistatic angle reaches 180°, the bistatic scattering coefficient attains its maximum value under the condition where the receiver grazing angle equals the transmitter grazing angle. This phenomenon is attributed to the occurrence of specular reflection effects under such geometric configurations.