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.
出处
《电波科学学报》
EI
CSCD
北大核心
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)
