幅相误差对阵列天线相位中心的影响分析

摘要

为精确预测阵列天线相位中心的特性,研究了阵列口径的幅相误差对阵列天线相位中心的影响.对阵列天线相位中心的求解方法进行了简要论述,得出了阵列天线相位中心的计算方法;采用该方法对一个算例阵列进行仿真计算,分别引入均匀分布和正态分布的幅相误差,计算得出不同类型幅相误差造成的天线相位中心变化.分析计算结果可以得出,幅相误差对阵列天线相位中心可造成显著影响,并且该影响与幅相误差分布类型和误差限有关.该研究结论可用于指导高精度阵列天线的设计.%The effect of the amplitude and phase error on the phase center of array antenna is investigated in the paper.Firstly,the method of calculating phase center of array antenna is briefly presented.The phase center of array antenna can be calculated accurately according to the phase distribution in the far field.Secondly,the simulation based on the proposed method is carried out on an example array with amplitude and phase error of uniform and Gaussian distribution,and the variation of the phase center on different error distribution is acquired.The calculating results indicate that the amplitude and phase error of the array antenna can make an obvious effect on its phase center,moreover,the effect is closely related to the type of the error distribution and the error limit.The conclusion can be used in designing high-precision array antenna.