改进DCIM求解分层媒质中的格林函数  

Solving Green function in multilayer media using improved DCIM

作　　者：李西敏[1] 童创明[1,2] 付树洪[1] 张伟[1] 

机构地区：[1]空军工程大学导弹学院,陕西三原713800 [2]毫米波国家重点实验室,江苏南京210096

出　　处：《电波科学学报》2009年第6期1141-1145,共5页Chinese Journal of Radio Science

基　　金：毫米波国家重点实验室基金项目资助(K200818)

摘　　要：提出了一种改进的离散复镜像系数法(Discrete Complex Image Method,DCIM),以克服传统DCIM计算分层媒质的格林函数时,在远场距离上精度不够、需要提取准静态项或表面波项进行弥补的缺点。在改进DCIM中,参数估计采用了新的采样路径,并在新的路径上分段应用DCIM,在不提取准静态项和表面波项的前提下,提高了DCIM在较远场源距离上的精度。最后,数值算例验证了改进DCIM的正确性。An improved discrete complex image method（DCIM）was proposed in order to overcome the disadvantages of conventional DCIM, which is not accurate enough in the far field-region, and needs to be remedied by extracting quasi-static and surface-wave terms. In the improved method, a novel sampling path was found during the course of parameter estimating. And the DCIM was adopted twice on the novel path, Its accuracy is greatly enhanced in farther field-region. Numerical examples validate the accuracy of the improved DCIM.

关 键 词：分层媒质 格林函数 离散复镜像系数法 改进离散复镜像系数法 

分 类 号：TN011[电子电信—物理电子学]