Research in the Effect of Multi-Path Coupling Scattering in Radar Imaging

This paper studies the effect of multi-path scattering in complex target, like dihedral angle, cavity and coupling parts, in radar imaging. Because of the local effect in high frequency scattering, the coupling effects are ignored in radar imaging. This approximation produces the error between pixel distribution and really projection of target. Many of the conventional imaging methods assume the EM waves are scattered just once (Born-approximation) from the target before returning to the detector. In reality, the EM waves can be scattered several times before returning to the detector. This approximation again produces error in the imaging method. In this paper, shooting bouncing ray method (SBR), which considers the coupling scattering of the targets is calculated, the difference are considered from the multi-path scattering can contribute largely in radar imaging.