分层双轴各向异性介质电磁传播矩阵计算  

Computation of electromagnetic propagation matrix for layered biaxial anisotropic media

作　　者：朱逸 李建周[1] 秦则芸 刘祥威 张生俊 ZHU Yi;LI Jianzhou;QIN Zeyun;LIU Xiangwei;ZHANG Shengjun(School of Electronic Information,Northwestern Polytechnical University,Xi’an 710129,China;Key laboratory of Experimental Physics and Computational Mathematics,Beijing 100076,China)

机构地区：[1]西北工业大学电子信息学院,陕西西安710129 [2]试验物理与计算数学重点实验室,北京100076

出　　处：《系统工程与电子技术》2021年第12期3420-3428,共9页Systems Engineering and Electronics

基　　金：西北工业大学研究生创意创新种子基金(CX2020160);陕西省重点研发计划国际科技合作计划(2019KW-054);陕西省2021年重点研发计划项目(2021KW-32)资助课题。

摘　　要：在广义传播矩阵(general transmitting matrix,GTM)方法分析各向异性介质传播特性的基础上,对分层双轴各向异性介质进行分析。构造双轴各向异性介质中横向场的状态矢量和耦合矩阵,得到双轴各向异性介质中的本征波,引入GTM,获得分层双轴各向异性介质的反射系数和透射系数。对不同介质涂覆结构的角度特性和频率特性进行分析,数值计算结果与商业软件结果高度一致。进一步将电磁传播矩阵与弹跳射线(shooting and bouncing ray,SBR)法相结合,获得介质涂覆目标的电磁散射特性,所得雷达散射截面结果与商业软件结果之间的均方根误差小于3 dBsm,体现了该方法的准确性。Based on the generalized transmitting matrix(GTM)method to analyze the propagation characteristics of anisotropic media,the layered biaxial anisotropic media are analyzed.The state vector and coupling matrix of the transverse field in biaxial anisotropic media are constructed to obtain the eigenwave in biaxial anisotropic media.The GTM is introduced to obtain the reflection coefficient and transmission coefficient of layered biaxial anisotropic media.The angular and frequency characteristics of different dielectric coated structures are analyzed,and the numerical results are highly consistent with those of commercial software.Further,the electromagnetic propagation matrix is combined with the shooting and bouncing ray(SBR)method to obtain the electromagnetic scattering characteristics of the dielectric coated target.The root mean square error between the radar cross section results and the commercial software results is less than 3 dBsm,which reflects the accuracy of this method.

关 键 词：各向异性介质 广义传播矩阵 反射系数 交叉极化 弹跳射线法 

分 类 号：O0441.4[理学]