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本文应用反应积分方程及统一几何绕射理论分析了临近有限尺寸导电平板的一种圆极化天线的辐射。首先用反应积分方程求得天线在临近无限大导电平板时的辐射,然后用统一几何绕射理论计算天线在有限尺寸导电平板边缘上产生的绕射,最后应用叠加原理求得天线合成方向图。应用这种方法可计算天线方向图、天线效率、天线电流分布及天线输入阻抗。对一种天线的实验结果与理论计算进行了比较,说明了这种分析是正确的。
In this paper, the reaction integral equation and the unified geometrical diffraction theory are used to analyze the radiation of a circularly polarized antenna near a finite size conductive plate. First, the radiation of the antenna near the infinite conductive plate is obtained by the reaction integral equation, and then the diffraction of the antenna generated on the edge of the conductive plate with finite size is calculated by the unified geometry diffraction theory. Finally, the antenna synthesis pattern is obtained by the superposition principle. Apply this method to calculate antenna patterns, antenna efficiency, antenna current distribution, and antenna input impedance. The experimental results of an antenna are compared with the theoretical calculations, indicating that this analysis is correct.