多波束阵列天线单元互耦效应分析

Analysis of The Effect by Mutual Coupling between Multibeam Array Antenna Elements

互耦效应导致阵列天线单元间耦合能量的矢量和随扫描角而变化 ,在特定频率和方向上可能产生较大的功率反射 ,并且引起方向图出现虚假波瓣。运用散射参数法对阵列天线单元互耦效应进行理论分析 ,阐述了其对天线性能的影响 ,提出了各种指标的实验测试方法。

The mutual coupling effect brings about vector sum of coupling energy between array antenna elements changing with the scan angle, that may result in larger power reflection in specific frequency and direction, and makes radiation pattern resulting in false beam segment. This paper analyzes the mutual coupling effect of array antenna elements reasonably, appling mode of scatter parameter, describes the influence of this effect to antenna performance,presents the experimental test method of various parameter indexes.