半空间电大涂敷目标散射的高频分析方法  

High-frequency analysis of scattering from coated targets with electrically large size in half space

作　　者：李晓峰[1] 谢拥军[1] 王鹏[1] 杨锐[1] 

机构地区：[1]西安电子科技大学天线与微波技术国家重点实验室,西安710071

出　　处：《物理学报》2008年第5期2930-2935,共6页Acta Physica Sinica

基　　金：教育部新世纪优秀人才支持计划(批准号:NCET-04-0950)资助的课题~~

摘　　要：研究了半空间内(海面,地面)电大尺寸涂敷目标散射的高频求解方法.将半空间并矢格林函数引入物理光学方法中,对半空间复杂环境影响进行考虑,并利用阻抗边界条件考虑涂敷目标表面的复杂电磁散射,推导出半空间物理光学分析方法,同时结合图形电磁学,对半空间电大涂敷目标进行消隐判断,提取像素面元法矢量和深度缓存等有效信息,快速有效地计算了半空间电大涂敷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 of electrically large coated targets in half space is presented in this paper. In order to consider the influence of environment, the half-space physico-optical integral equation is deduced by introducing the half-space Green＇s function into the physico-optical method. Combined with the graphical-electromagnetic computing method, the shadow regions are eliminated quickly and the geometry information is attained by reading the color and depth of each pixel. Meanwhile, we use the impedance boundary conditions to account for the target covered RAM in half space, and the radar cross section of coated targets can be exactly calculated in half space. The numerical results show that this method is efficient and accurate.

关 键 词：半空间物理光学方法 半空间并矢格林函数 图形电磁学 雷达散射截面 

分 类 号：O451[理学—无线电物理]