半空间目标宽带电磁散射特性的快速插值方法  

Fast interpolation of broadband electromagnetic scattering for complex targets in half space

作　　者：樊君[1] 雷振亚[1] 谢拥军[1,2] 田超[1] 陈博韬[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,陕西西安710071 [2]北京航空航天大学电磁兼容实验室,北京100083

出　　处：《电波科学学报》2012年第1期84-89,101,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(No.60771040)

摘　　要：将幅相分离插值方法应用于半空间目标宽带电磁散射特性的分析中。针对半空间散射体表面感应电流的特性,将主要相位因子提出单独考虑,余下随频率变化相对平滑的剩余项运用最佳一致逼近快速求取其宽带特性,再结合半空间格林函数求解半空间背景下目标的电、磁矢量及标量位函数,进而求解其散射场,最终有效地分析了半空间目标的宽带电磁散射特性。数值结果证明了方法的有效性和准确性。Amplitude-phase detached interpolation technique is introduced to analyze broadband electromagnetic characteristics of complex targets in half space. The main phase factor is extracted and separately considered, while the remain term which broadband characteristics can be computed by the best uniform approxima- tion since it varies smoothly with the change of frequency. Then the half-space Green＇s function is combined to calculate the electric vector, magnetic vector and scalar potential function respectively, thus obtain the scattering fields. Finally the wideband radar cross section （RCS） of the targets in half space at any frequency within the given frequency range can be obtained. The numerical results show that this method is efficient and accurate.

关 键 词：幅相分离法 半空间并矢格林函数 图形电磁学 宽带雷达散射截面 

分 类 号：TN011[电子电信—物理电子学]