三层导电媒质中环天线的远区电磁场

快速准确地计算分层导电媒质中的环天线产生的电磁场一直受到人们的重视。由于这个问题常常涉及到Ｓｏｍｍｅｒｆｅｌｄ型积分的计算问题，因而是相当困难的。本文采用一种计算远场Ｓｏｍｍｅｒｆｅｌｄ型积分的新方法，结合复镜象理论，快速方便地得出了三层导电媒质中环天线远区场强的解析表达式。该方法可以很方便地推广应用到类似情况的远区场强的计算中去。

Far Fields due to a Loop Antenna in a Three-Layered Conducting Medium

Great attention has been paid to calculating conveniently the electromagnetic field due to a loop antenna buried in stratified media. It is quite difficult because this topic is involved with the computation of Sommerfeld-Type integral. In this paper the closed-form expressions of far field of a loop antenna in a three-layered conducting medium are obtained rapidly by using a new technique to evaluate Sommerfeld-Type integral with the aid of the complex image theory. The present approach can be also used to get the far field formulas of other similar cases.