用“Roof－top”函数研究天线位于有耗介质附近的散射

Using“Roof-Top”Function to Study the Antennas Near Lossy Dielectric Bodies

研究了几副天线位于任意形状的有耗介质附近时其散射的计算方法，其中，任意几何形状用表面三角面片模型模拟，在有耗介质表面采用“Ｒｏｏｆ－ｔｏｐ”函数做为基函数，从而更精确地模拟出了电流的实际分布。给出了几副天线位于有耗平板及圆柱附近的计算实例。计算结果表明，该方法是分析天线位于有耗介质附近时的有效分析方法。

This paper studies electric parameter variation of several antennas near arbitrary shaped lossy dielectric bodies using moment methods. The surface of arbitrary geometrical shape is modeled by using surface triangular patches.“Roof-top”function is used as base function on the surface of the lossy dielectric objecrs.Thes method may model actual current more accuratly. We calcutate examples of several antennas near lossy surface.The results show that this method is a powerful method to analysis antennas near lossy dielectric bodies.