海面舰船目标复合电磁散射的镜像多路径模型

摘要

针对传统四路径模型存在的平面近似误差问题，提出了海面舰船目标复合散射的镜像多路径模型。该模型合理解释了目标下方粗糙海面镜像反射单元斜率缓变对耦合散射的影响。数值仿真实验表明，这种包含船海各部分散射单元的振幅和相位信息的场叠加模型，可以有效地应用于海上舰船目标散射特征的识别和SAR图像仿真。%Aiming at the problem of planar approximation error in the traditional four-path model,a specular multi-path model for the EM scattering from sea surface with a ship-like target was put forward,which could reasonably explain the influence of slowly changing slope of specular reflection unit of sea surface below target on the coupling scattering.Numerical simulation results showed that the field superposition model,which con-tained both the amplitude and phase information of the scattering facets on the composite ship-sea surface,could be effectively applied in the scattering characteristics identification of ship target on the sea surface and SAR im-age simulation.