有耗媒质中跨界面目标电磁散射的高效计算  

Efficient Calculation of Electromagnetic Scattering from Cross-Interface 3D Structures in Lossy Multilayered Media

作　　者：李文[1] 尹成友[1] 马亮[1] 

机构地区：[1]电子工程学院脉冲功率激光技术国家重点实验室,合肥230037

出　　处：《应用科学学报》2010年第3期318-325,共8页Journal of Applied Sciences

基　　金：国家自然科学基金(No.60671057)资助

摘　　要：计算分层媒质中三维目标电磁散射的首要任务是求解格林函数.传统的离散复镜像法计算格林函数存在一定的缺陷,对此该文将增强型离散复镜像法与二维离散复镜像法相结合,求解了有耗分层媒质中任意跨界面三维目标的空域格林函数,并且与直接数值积分的结果进行比较,结果表明两者是一致的.该文方法与一维离散复镜像法相比,极大地提高了矩量法矩阵阻抗的填充效率,有效解决了有耗媒质情况下的空域格林函数计算问题,具有工程实用价值.In calculating electromagnetic scattering of arbitrary 3D structures in multilayered planar media, the main task is to calculate the Green＇s function.The conventional discrete complex image method（DCIM） has some limitations.In this paper,we combine the enhanced DCIM（E-DCIM） with two dimensional DCIM （2D-DCIM） to compute the spatial domain closed-form Green＇s function for arbitrary 3D structures partially embedded in dielectric interface in lossy multilayered media.The results are compared with the values obtained with numerical integration,and show agreement between the two methods.Compared with the ID-DCIM,the impedance matrix filling efficiency of the method of moments（MoM） is significantly improved.The problem of finding the spatial Green＇s function in lossy media is effectively solved.The proposed method is applicable to practical engineering.

关 键 词：电磁散射 矩量法 分层媒质 格林函数 增强型离散复镜像 二维离散复镜像法 

分 类 号：TN957[电子电信—信号与信息处理]