圆环阵列的互耦效应分析

互耦效应是阵列天线中确实存在并且影响天线性能的因素,所以互耦效应是阵列天线的分析和设计中必须考虑的因素.本文较为全面地分析了互耦效应对圆环阵列波束赋形的影响,涉及阵列阻抗变化、单元辐射特性变化,以及对馈电网络的影响.为了确定互耦影响下阵列各单元上激励电流分布,本文提出了一种迭代算法.仿真计算结果表明,该迭代算法对圆环阵列是有效的.通过综合考虑互耦对天线阵的各种影响,得到圆环阵列中互耦效应对波束赋形的仿真结果.

Mutual coupling analysis of circle antenna array

Mutual coupling is existed in the antenna arrays and affects the performance of the antenna.Therefore,mutual coupling is the factor that must be taken into account in the antenna analysis and design.In this paper,the mutual coupling is comprehensively analyzed;the change of the impedance of the antenna array,the change of the element radiation characteristic,and the influence to the feed network are also mentioned.An iteration algorithm is proposed to compute the current distribution in the array element influenced by mutual coupling.After simulation experiment,a series of simulation data validate the iteration algorithm.And the simulation results of shaped-beam are got via considering several influence factors caused by mutual coupling.