复杂媒质电磁散射特性的有限元—边界元方法分析  

Computation of scattering from the complex media targets with the hybrid finite-element boundary integral method

作　　者：樊振宏[1] 朱剑[1] 曹海平[1] 陈如山[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094

出　　处：《电波科学学报》2009年第3期452-456,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(No.60701003;No.60871013);江苏省自然科学基金-创新学者攀登项目(No.BK2008048);中国博士后科学基金(20070411053);南京理工大学首批百名优秀教师培养计划

摘　　要：通过有限元—边界元方法分析具有复杂媒质特性目标的电磁散射特性,如各向异性、双各向同性、双各向异性等。该混合方法能够利用有限元灵活地处理散射体内部的复杂材料,利用边界积分方法分析物体的非闭合区域,避免了使用吸收边界条件截断开放区域。通过推导基于有限元法的双各向异性媒质的泛函表达式,实现铁氧体、等离子体、手征等各类复杂媒质的统一建模,使该方法有很强的通用性。数值结果证明:本文发展的有限元—边界元方法对复杂媒质电磁散射问题分析的准确性和有效性。The hybrid finite-element boundary integral method （FE-BI） is applied for the analysis of the scattering from the complex media targets, such as the anisotropic media, bi-isotropic media, and bi-anisotropic media. The inside complex media part is discreted by the finite-element method （FEM）. We derive the general functional formulation of the bi-anisotropic media in FEM, and this functional formulation is also applicable for the anisotropic or bi-isotropic media. The boundary region around the target is analyzed by the method of moment （MOM）. Finally, some numerical results are given to demonstrate the accuracy and efficiency of the developed hybrid method for the scattering analysis of the complex media targets.

关 键 词：有限元-边界元法(FE—BI) 电磁散射 各向异性媒质 双各向同/异性媒质 

分 类 号：TN015[电子电信—物理电子学]