有限元法与矩量法结合分析背腔天线的辐射特性

采用有限元法与矩量法相结合分析有限导体面上背腔天线的辐射特性。计算中采用一种有效的积分方程及矢量权函数的形式来保证计算精度。在前处理中采用ＡｕｔｏＣＡＤ中的实体造型技术，对目标可方便地进行离散的局部加密，计算机存储空间及计算量明显下降，使本文方法成为对背腔天线辐射总是中有效方法，文中计算了有限导体面上同轴腔及同轴馈电圆形腔的辐射特性，并与已发表的结果进行比较，验证了本文算法的有效性。

FEM Combined with MoM for Analyzing the Characteristics of Cavity Backed Antennas

In this paper the finite element method combi ne d with method of moments is used to analyze the radiation characteristics of cav ity backed antennas in a finite conducting plane.An efficient boundary integra l formulation and weighted vector function are used. The memory and computing t ime are improved by virtue of the efficient finite element discretization techni que. The radiation characteristics of an open ended coaxial cavity and a coaxi al cavity backed circular aperture in a finite conducting plane are computed an d compared with published results in order to verify the efficiency of the metho d.