DCIM求解多层媒质闭式格林函数

Application of DCIM to Calculation of Closed-Form Green＇s Functions of Multilayered Media

离散复镜像方法是求解平面分层媒质格林函数的有效方法之一。本文全面系统地论述了离散复镜像法求解多层媒质空域格林函数的详细过程，并着重讨论了第m层为有界区域的DCIM处理方法、表面波提取方法和多层媒质中的三维目标空域格林函数的有效插值方法等几个关键技术，从而提高了空域格林函数的求解效率。几个典型实例的计算结果表明了本文方法的有效性。

This paper summarizes the application of DCIM to compute spatial-domain Green＇s functions of multilayered media in detail. Several key techniques such as the method of DCIM when the mth layer is finite, the method of extraction of surface wave poles and the solution method of closed-form Green＇s functions of 3D objects in multilayered medias are emphasized in this paper. Then the computation efficiency is enhanced. Numerical examples show this method is very efficient.