地面复杂目标宽带电磁散射特性分析

提出运用FDTD计算地面复杂目标宽带电磁散射特性的方法.首先分析地面的散射,并建立复杂目标的FDTD模型,再将地面的散射场与入射场视为两个激励场作用于目标,从而得到地面背景下目标的散射场.运用此方法计算了地面卡车的电磁散射特性,并与实测结果作了对比,两者比较吻合.

Analysis on Scattering Characteristic of Complex Objects upon the Ground

In this paper, a new technique on analyzing the scattering characteristic of complex objects on the ground using FDTD method is presented. In order to deal with the electromagnetic interaction of the ground and the object, scattering field of the ground is calculated firstly, the incident field and the scattering field of the ground are treated as two inducing sources to the object, which is accurately modeled by the procedure proposed in this paper. And then, the scattering field of the object is calculated. Finally, the computing result of a truck with this method is given and compared with the experimental data.