IPO+FMM混合方法结合GRI和级联技术计算电大腔体的RCS

罗威; 高正平; 张怀武

doi:10.3724/SP.J.1146.2006.00101

IPO+FMM混合方法结合GRI和级联技术计算电大腔体的RCS

doi: 10.3724/SP.J.1146.2006.00101

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出版历程
- 收稿日期: 2006-01-19
- 修回日期: 2006-09-01
- 刊出日期: 2007-09-19

Fast Calculate the RCS of Electrically Large Cavity by IPO+FMM Combined with the GRI and Connection Technology

摘要

摘要: 采用快速方法(FMM, RPFMM, FaFFA)加速迭代物理光学法(IPO)的迭代过程，可以快速计算电大腔体的电磁散射特性。采用广义互易积分，用靠近腔体终端的一个St面将腔体分成两段，形状简单光滑的腔体前端用IPO结合快速算法处理，而腔体终端单独分析。为了能够处理深腔体和进一步加快计算速度，将腔体前端进一步分成几个子腔体，每一个子腔体独立分析，通过一个级联方法求得腔体前端在St面产生的辐射场，最终在St面用广义互易积分求得腔体的RCS。数值计算结果表明该方法是准确的，同时能有效地提高计算速度。
- 广义互易积分;腔体;快速多极子法;迭代物理光学法
Abstract: The method combined IPO, FMM, RPFMM, FaFFA can rapidly solve the scattering of three-dimensional cavity. In this paper, the Generalized Reciprocity Integral(GRI) method is applied to treat the cavities with termination. The cavity is divide into two different parts by a surface St which is located sufficiently close to the termination, the front section (typically simple and smooth) is analyzed by a hybrid method which IPO combined with FMM, RPFMM and FaFFA, the termination can be analyzed independently. To solve the deep cavities and improve computing speed the front section of cavity is subdivided into several sections, and each of them is analyzed independently using the IPO combined fast computing method from the rest of the cavity. Then a connection scheme is used to get the scattering field radiated by the front section at the surface St . Finally the RCS of the cavity is get by the GRI at surface St. The numerical results show the hybrid method is accurate enough and can improve effectively computing speed。

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Lee R and Tse-Tong Chia. Analysis of electromagnetic scattering from a cavity with a complex termination by means of a hybrid ray-FDTD method[J]., IEEE Trans. on Antennas and Propagation.1993, 41(11):1560-1569[2]Tse-Tong Chia, Burkholder R J, and Lee R. The application of FDTD in hybrid methods for cavity scattering analysis[J].IEEE Trans. on Antennas and Propagation.1995, 43(10):1082-1090[3]Rousseau P R and Burkholder R J. A hybrid approach for calculating the scattering from obstacles within large, open cavities[J].IEEE Trans. on Antennas and Propagation.1995, 43(10):1068-1075[4]顾长青, 王璟. IPO-FDTD混合法计算三维复杂腔体的RCS. 电波科学学报, 2003, 18(4): 385-388.[5]何小祥, 徐金平. 改进的IPO与FEM混合法分析电大腔体的电磁散射. 电波科学学报 2004, 19(5): 607-612.[6]Pathak P H and Burkholder R J. A reciprocity formulation for the EM scattering by an obstacle within a large open cavities[J].IEEE Trans. on Microwave Theory and Techniques.1993, 41(4):702-707[7]Obelleiro F.[J].Campos-Nioň J, and Rodrguez J L. A segmented approach for computing the electromagnetic scattering of large and deep cavities. Progress In Electromagnetic Research, PIER.1998,19:-[8]Obelleiro F, Rodriguez J L, and Burkholder R J. An iterative physical optics aApproach for analyzing the electromagnetic scattering by lLarge open-ended cavities[J].IEEE Trans. on Antennas and Propagation.1995, 43(4):356-361[9]Burkholder R J. A fast and rapidly convergent iterative physical optics algorithm for computing the RCS of open-ended cavities. ACES Journal, 2001, 16(1): 53-59.[10]Burkholder R J and Lundin T. Forward-backward iterative physical optics algorithm for computing the RCS of open-ended cavities. IEEE Trans. on Antennas and Propagation Symposium, 1995, 3(18): 1528-1531.[11]Lu C C and Chew W C. Fast algorithm for solving hybrid integral equations [EM wave scattering]. IEEE Trans. on Antennas and Propagation, 1993, 140(6): 445-460.[12]Song J M and Chew W C. Fast multipole soution of three dimension integral equation[J].IEEE Trans. on Antennas and Propagation.2005, 53(2):793-799[13]Wang Tai-Mo and Ling Hao. Electromagnetic scattering from three-dimensional cavities via a connectin scheme[J].IEEE Trans. on Antennas and Propagation.1991, 39(10):1505-[14]Pathak P H and Burkholder R J. Modal, ray and beam techniques for analyzing the EM scattering by open-ended waveguide cavities[J].IEEE Trans. on Antennas and Propagation.1989,37(5):635-647[15]Chuang C W and Pathak P H. Ray analysis of modal reflection for three-dimensional open-ended wave waveguides[J].IEEE Trans. on Antennas and Propagation.1989, 37(3):339-346[16]王浩刚，聂在平等. 对三维多层快速多极子方法中不变项计算的优化. 电子学报, 2000, 28(9): 105-108.

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