半空间复杂目标的高频分析方法

High-Frequency Analysis on Scattering from Complex Conductive Targets in Half Space

该文研究了半空间内复杂导体目标散射的高频求解方法。分析半空间电磁波的传播规律,将半空间并矢格林函数引入传统的物理光学方法,等效电磁流法方法中,推导出半空间物理光学算法、半空间等效电磁流算法,同时结合图形电磁学和射线追踪方法,分别对半空间复杂目标的消隐和多重散射进行考虑,与半空间目标面元、棱边散射场相叠加,快速有效地计算了半空间复杂目标的雷达散射截面。数值结果证明了方法的有效性和准确性。

The high-frequency method for solving the scattering from electrically large conductive targets in half space is presented in this paper. The High-frequency method is deduced by introducing the half-space Green＇s function into the conventional method of physical optics, method of equivalent currents. Combined with the graphical-electromagnetic computing method and ray tracing technique that account for shadowing, multiple scattering in half space, one may calculate the radar cross-section of a conductive targets object in a half space. The numerical results show that this method is efficient and accurate.