各向异性阻抗面电磁散射快速数值算法研究  

Electromagnetic scattering from anisotropic impedance surface using fast numerical algorithm

作　　者：余定峰[1] 何思远[1] 张凡[1] 朱国强[1] 殷红成[2] 邓方顺 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072 [2]中国航天科工集团公司二院207所,北京100854 [3]中船重工集团722研究所,湖北武汉430079

出　　处：《电波科学学报》2012年第4期791-796,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61001059;60671040);教育部博士研究生学术新人奖(5052011207017);中央高校基本科研业务费专项资金;中国博士后基金资助课题

摘　　要：基于多层UV矩阵分解技术,提出用矩量法(MoM)求解三维各向异性阻抗面电磁散射的MoM-UV快速数值算法。根据等效原理,将表面电磁流以RWG(rao-wilton-glisson)矢量基函数展开。引入阻抗边界条件(IBC),以表面阻抗并矢表征电磁参数,实现各向异性阻抗面的电磁仿真。通过多层UV进行低秩矩阵压缩,减少矩阵-向量积运算和内存需求,利用稳定的双共轭梯度(BICGSTAB)迭代方法求解。给出典型算例,并与Mie级数解等精确结果比较,验证该算法的精度和效率。A MoM-UV fast numerical algorithm based on multilevel UV matrix de- composition is presented to analyze the electromagnetic scattering from three-di- mensional anisotropic impedance surface. The surface equivalence principle is a- dopted with electromagnetic current expanded by three-dimensional Rao-Wilton- Glisson（RWG） vector basis functions. The electromagnetic simulation of aniso- tropic impedance surface is performed using impedance boundary condition （IBC）, with the electromagnetic parameters characterized by surface impedance dyadic. As the current is solved by BICGSTAB iterative method, so compressions to the low~ rank sub matrices are performed using multilevel UV technology to reduce the oper- ation of matrix-vector product and memory requirement. Several typical examples are presented with numerical results compared to the Mie series or pure MoM solu- tion to verify the accuracy and efficiency of the proposed algorithm.

关 键 词：电磁散射 各向异性 阻抗边界条件 UV分解 RWG 

分 类 号：TM15[电气工程—电工理论与新技术]