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電大尺寸開口腔體電磁散射特性的DDM/FEM-BIE混合法分析

何小祥,  徐金平

何小祥, 徐金平. 電大尺寸開口腔體電磁散射特性的DDM/FEM-BIE混合法分析[J]. 電子與信息學(xué)報(bào), 2004, 26(3): 500-504.
引用本文: 何小祥, 徐金平. 電大尺寸開口腔體電磁散射特性的DDM/FEM-BIE混合法分析[J]. 電子與信息學(xué)報(bào), 2004, 26(3): 500-504.
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.
Citation: 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.

電大尺寸開口腔體電磁散射特性的DDM/FEM-BIE混合法分析

DDM/FEM-BIE Approach for Analyzing EM Scattering of Electrically Large Open-Ended Cavities

  • 摘要: 該文將超松弛重疊及非重疊區(qū)域分裂法(DDM)與矢量有限元方法(EB-FEM)、邊界積分方程(BIE)法相結(jié)合對(duì)三維電大尺寸開口腔體的電磁(EM)散射特性進(jìn)行分析。通過DDM將原腔體分解成若干子腔體，在各子腔體內(nèi)應(yīng)用EB-FEM進(jìn)行分析。腔體間應(yīng)用矢量傳輸條件進(jìn)行耦合，最終腔體內(nèi)電場(chǎng)分布通過迭代獲得。在原腔體口面，運(yùn)用積分方程進(jìn)行描述。在分析過程中，將傳輸條件和BIE統(tǒng)一成第三類邊界條件形式。最后給出的數(shù)值結(jié)果驗(yàn)證了DDM/FEM-BIE混合方法分析腔體的電磁散射特性的精確性及高效性。
    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.
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  • Robert Lee, Tsc-Tong Chia. Analysis of electromagnetic scattering from a cavity with a complex termination by means of a hybrid ray-FDTD method. IEEE Trans. on AP, 1993, 41(11): 1560-1569.[2]Ross D C, Volakis J L. Hybrid finite element-model analysis of jet engine inlet scattering. IEEE Trans. on AP, 1995, 43(3): 277-285.[3]Liu Jian, Jin Jian-ming. A special higher order finite-element method for scattering by deep cavities. IEEE Trans. on AP, 2000, 48(5): 694-703.[4]Despres B. Domain decomposition method and the Helmholts problem[c]. Proc Int. Symp.Mathemat. Numerical Aspects Wave Propagate Phenomena, Strasbourg, France, SIAM ed.,1992: 44-52.[5]Stupfel B. A fast-domain decomposition method for the solution of electromagnetic scattering by large objects. IEEE Trans. on AP, 1996, 44(10): 1375-1385.[6]Stupfel B. A domain decomposition method for the vector wave equation. IEEE Trans. on AP.,2000, 48(5): 653-660.[7]汪杰,尹雷,洪偉.區(qū)域分裂法及其在三維散射中的應(yīng)用.電波科學(xué)學(xué)報(bào),2000,15(3):334-338.
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出版歷程
  • 收稿日期:  2002-09-24
  • 修回日期:  2003-05-27
  • 刊出日期:  2004-03-19

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