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电大尺寸开口腔体电磁散射特性的DDM/FEM-BIE混合法分析
引用本文:何小祥,徐金平.电大尺寸开口腔体电磁散射特性的DDM/FEM-BIE混合法分析[J].电子与信息学报,2004,26(3):500-504.
作者姓名:何小祥  徐金平
作者单位:1. 南京航空航天大学信息科学与技术学院,南京,210016
2. 东南大学毫米波国家重点实验室,南京,210096
基金项目:教育部“高等学校骨干教师资助计划”项目,国家自然科学基金(60271035)资助课题
摘    要:该文将超松弛重叠及非重叠区域分裂法(DDM)与矢量有限元方法(EB-FEM)、边界积分方程(BIE)法相结合对三维电大尺寸开口腔体的电磁(EM)散射特性进行分析。通过DDM将原腔体分解成若干子腔体,在各子腔体内应用EB-FEM进行分析。腔体间应用矢量传输条件进行耦合,最终腔体内电场分布通过迭代获得。在原腔体口面,运用积分方程进行描述.在分析过程中,将传输条件和BIE统一成第三类边界条件形式。最后给出的数值结果验证了DDM/FEM-BIE混合方法分析腔体的电磁散射特性的精确性及高效性。

关 键 词:区域分裂法  矢量有限元方法  边界积分方程
文章编号:1009-5896(2004)03-0500-05
收稿时间:2002-9-24
修稿时间:2002年9月24日

DDM/FEM-BIE Approach for Analyzing EM Scattering of Electrically Large Open-Ended Cavities
He Xiao-xiang,Xu Jin-ping.DDM/FEM-BIE Approach for Analyzing EM Scattering of Electrically Large Open-Ended Cavities[J].Journal of Electronics & Information Technology,2004,26(3):500-504.
Authors:He Xiao-xiang  Xu Jin-ping
Affiliation:Coll. of Info. Sci. and Tech., Nanjing Univ. of Aeronautics and Astronautics Nanjing 210016 China;State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China
Abstract:Edge Based Finite Element Method (EB-FEM) is combined with overlapping or nonoverlapping overrelaxation Domain Decomposition Method (DDM) and Boundary Integral Equation (BIE) for analyzing the electromagnetic (EM) scattering of electrically large open-ended cavities. The cavity is partitioned into several small subdomains. EB-FEM is applied in every subdomain. The coupling of each neighboring subdomains is realized by vector transmission condition, and the electric field distribution in the cavity is found by iteration. BIE is added on the aperture of the original cavity. Both the BIE and transmission condition are transformed into the third boundary condition. Several numerical results are presented, which demonstrate that the proposed approach is accurate and efficient for analysis of the EM scattering of open-ended cavities.
Keywords:Domain decomposition method  Edge based finite element method  Boundary integral equation
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