Coupling Scattering Characteristic Analysis of Dihedral Corner Reflectors in SAR Images

The scattering mechanisms of dihedral corner reflectors have attracted great attention in the past decades. However, the scattering centers of dihedral corners are not discussed systematically. In this paper, the multi-bouncing scattering mechanism of dihedral corners is analyzed in detail based on the scattering characteristics of polygon plates and ray-tracing technique. Furthermore, the coupling scattering center (CSC) is proposed as a detailed explanation of the multi-bouncing scattering mechanism of dihedral corners and the locations of CSCs in the high-resolution range profile are deduced based on the monostatic-and-bistatic equivalence theorem. CSCs give a precise description of target structures and can improve the ability of radar target recognition. Finally, the simulation results via electromagnetic computation validate the theoretical analysis.