介质涂覆电大复杂腔体散射的快速求解  

Fast calculation of scattering of dielectric coated electrically large complex cavities

作　　者：罗威[1] 高正平[1] 张怀武[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,四川成都610054

出　　处：《电波科学学报》2008年第1期168-173,共6页Chinese Journal of Radio Science

摘　　要：利用腔体涂覆层是薄层损耗介质的情况,引入阻抗边界条件求解腔体的介质涂覆区域。详细推导了快速多极子方法结合迭代物理光学法和阻抗边界条件的混合计算公式。在此基础上利用前后向迭代方法加速收敛。计算结果表明该方法比IPO+FMM方法有效地减少了迭代次数,能够对腔体涂覆材料的电磁参数、腔体涂覆部位进行优化设计,对开口腔体的RCS减缩提供理论参考。The equivalent impedance boundary condition（EIBC） is introduced to combined with the iterative physical optics（IPO） for solving the scattering of a three-dimensional cavity with its inner face partially or entirely coated by thin layer material. The forward-backward methodology is combined with the fast multipole method（FMM） and the iterative physical optics（IPO） to improve convergence and computational efficiency. The iterative formulations for the hybrid algorithm are derived in detail in this paper. The numerical results show this hybrid method is ac- curate and can improve convergence than IPO＋FMM. The new method is useful for optimizing the EM-parameter of the coating material and its coated positions. It can also provide a reasonable reference for design in reducing the RCS of open-ended cavities.

关 键 词：迭代物理光学法 阻抗边界条件 腔体 快速多极子 

分 类 号：TN971.2[电子电信—信号与信息处理]