测向天线阵互耦效应分析  

Analysis on Mutual Coupling Effect of Antenna Arrays in Direction Finding Systems

作　　者：白春惠[1] 

机构地区：[1]中国人民解放军91404部队

出　　处：《无线电工程》2011年第10期40-43,共4页Radio Engineering

摘　　要：天线阵元间的互耦效应将导致天线阵列的电参数和方向性的改变,从而影响测向系统的性能。针对天线阵列各单元之间的互耦现象,提出了利用矩量法精确分析天线阵列各单元上的电流分布,进一步通过互阻抗网络计算法求出测向天线单元的实际激励电压的幅度和相位,进而得到天线的辐射和接收特性。对实际的均匀直线阵列超分辨测向系统中的互耦效应进行了分析,给出了仿真结果,验证了互耦效应对测向性能的影响。Mutual coupling effect between antenna elements would change their electric parameters and direction characteristic.In this paper,the method of moment（MoM） technique is used to analyze the actual current distribution in array elements precisely.Then,using mutual impedance network,we can obtain the practical amplitude and phase of the excited voltage in array elements.Consequently,the radiation characteristic of the elements can be analyzed precisely.And the accuracy and resolution of direction finding system would be improved by correcting the direction finding algorithm with the analysis results.Finally,the simulation results with MATLAB are provided to demonstrate mutual coupling effectiveness.

关 键 词：测向天线阵 互耦效应 矩量法 互阻抗 

分 类 号：TN918[电子电信—通信与信息系统]