考虑棱边散射的半空间复杂导体目标高频分析方法  

The high-frequency method for scattering from the wedges of complex conductive targets in half space

作　　者：李晓峰[1] 谢拥军[1] 樊君[1] 王元源[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》2009年第2期908-913,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60771040)资助的课题~~

摘　　要：研究了半空间内复杂导体目标棱边散射的高频求解方法.分析半空间电磁波的传播规律和复杂目标棱边的电磁散射特性,将半空间并矢格林函数引入等效电磁流方法中,给出了基于等效电磁流法和物理绕射理论的半空间棱边散射场计算式,同时结合图形电磁学,对半空间复杂目标进行消隐处理,判断目标的棱边像素及获得棱边参数,与半空间目标的面元散射场相叠加,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 the wedges of conductive targets with electrically large size in half space is presented in this paper. To take into account of the influence of environment,the half-space equivalent edge current method is deduced by introducing the half-space Green＇s function into the equivalent edge current method. Combined with the graphical-electromagnetic computing method,the shadow regions are eliminated quickly and the edge pixel parameters are obtained by reading the edge pixels. Meanwhile,we also make use of the half-space physical optical method to treat the complex targets,and then the radar cross section of the complex targets can be exactly calculated in half space. The numerical results show that this method is efficient and accurate.

关 键 词：半空间等效电磁流方法 半空间并矢格林函数 图形电磁学 雷达散射截面 

分 类 号：O441[理学—电磁学]