偏置角对偏置抛物面天线特性的影响

Effect of Offset Angle on Offset Parabolic Antenna

以偏置角作为变化因素来分析研究偏置抛物面天线的远场特性，采用表面电流法计算远场的方向图、半功率圆以及交叉极化电平等参数，并对几种不同偏置角的远场特性进行了计算和分析比较．结果表明，随着偏置角的变化，Ｅ面内远场特性变化不大。

Offset angle is taken as a variable to analyze the far field performance of offset parabolic antenna, surface current method is used to calculate the far field patterns, half power circles and cross polar level etc.. Several cases with different offset angle are computed and analyzed.Little change is shown in the far field performance when offset angle changed in E plane, and apparent change is seen in H plane.