介质粗糙面上目标后向散射的高效混合算法  

Highly Efficient Hybrid Method for Computing the Backscattering from Objects Above a Dielectric Rough Surface

作　　者：张晓燕[1] 盛新庆[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2010年第4期460-463,487,共5页Transactions of Beijing Institute of Technology

基　　金：国家"九七三"计划项目(2005CB321702);国家自然科学基金资助项目(10832002)

摘　　要：以计算介质粗糙面上目标后向散射为目的,提出一种高效的混合计算方法.该方法在单独处理粗糙面与目标方面与传统混合法一致,即使用基尔霍夫近似法(KA)处理粗糙面区域,使用矩量法(MoM)并结合多层快速多极子技术处理目标区域.实验结果表明,所提出的混合法与传统方法不同的是,根据大尺度光滑型介质粗糙面镜向散射最强的特点,在计算耦合场时只在粗糙面上截取一块区域进行计算,从而极大地减少了耦合场计算中所用内存与时间.A highly efficient hybrid method of the Kirchhoff approach（KA） and the method of moment（MoM） is proposed for calculating the backscattering monostatic radar cross section（RCS） of conducting objects above a dielectric rough surface.Similar to the conventional hybrid KA-MoM,the KA is used to calculate the scattering by the rough surface and the MoM is applied to calculate the scattering by the objects.The main difference between the proposed method and the conventional KA-MoM algorithm is that the size of the rough surface has been truncated when calculate the interactions between the objects and the rough surface is conducted,for depending on the specular reflection of the smooth surface.By executing the truncation,the memory and the computation time is significantly reduced.

关 键 词：电磁散射 介质粗糙面上目标 混合法 多层快速多极子 

分 类 号：O441.4[理学—电磁学]