自适应天线阵中单元互耦对系统性能的影响

The effect of element mutual coupling on the performance of adaptive arrays

基于广义网络理论 ,建立了考虑单元互耦效应的自适应天线系统的分析模型 .用天线阵归一化广义阻抗矩阵表示单元互耦 ,分析了考虑单元互耦效应的自适应天线协方差矩阵的特点 .以偶极子单元组成的平面阵为例 ,模拟计算了单元互耦对自适应天线的信号干扰噪声比和暂态反应时间的影响 ,说明在一定单元间距范围内 。

Based on the general network theory, the analytical model of adaptive arrays with the mutual coupling between array elements taken into account is derived. By using the arrays normalized general impedance matrix to express the mutual coupling between the elements, the characteristics of the covariance matrix of the adaptive arrays are analyzed. The effect of mutual coupling on the performance of the signal to interference plus noise ratio (SINR) and the transient response is illustrated with the example of the planar array constituted by dipoles. It is shown that the mutual coupling betwteen the elements degrades the SINR and reduces the speed of response of the arrays with certain inter element spacing.