随机粗糙面及其上方多个导体目标复合电磁散射的FE-BIM方法.doc

文档介绍：
随机粗糙面及其上方多个导体目标复合电
磁散射的 FE/BIM 方法#
徐润汶,郭立新*
5
10
15
20
25
30
35
40
(西安电子科技大学物理与光电工程学院,西安 710071)
摘要:本文利用混合有限元-边界积分方法(finite element-boundary integral method,FE/BIM)
研究了导体随机粗糙面及其上方多个导体目标的复合电磁散射。基于区域分解原理,将整个
求解区域划分为多个独立的包含模型的子区域以及除子区域以外的外部区域,并引入共形人
工边界条件以达到减小仿真区域的目的。对于包含模型的多个子区域,采用有限元方法(FEM)
进行讨论,而不同子区域之间的相互作用通过积分边界条件考虑区域之间的耦合作用。结果
表面,与传统的矩量法(MoM)相比,该混合 FE/BIM 方法适用性强并且精度很高。最后利用
该混合 FE/BIM 方法详细讨论了随机粗糙面及其上方多个目标的电磁散射特性。
关键词:电磁散射,FE/BIM,随机粗糙面,多个目标
中图分类号:TN011
Finite Element-Boundary Integral Algorithm to Solve
ic Scattering from Multiple Targets over
Rough Surface
XU Runwen, Guo Lixin
(School of Physics and Optoelectronic Engineering, Xidian University, Xi’an, China (710071))
Abstract: This work presents a hybrid finite element-boundary integral method (FE/BIM) to solve the
problem of scattering from multiple targets above the rough surface. Based on the domain
position technology, the solution region is divided into multiple isolate interior regions for each
object and the region exterior to all the interior regions. In this paper, the conformal artificial
boundaries are introduced, which can reduce puted region extremely. For the fields in the
multiple isolate interior regions, finite element method is used to solve the scattering problem
respectively, whereas the coupled interaction among isolate regions can be taken into account by
integral bo