天线相位中心位置的计算方法

Method of Calculating Antenna Phase Center Position

本文提出了一种天线相位中心位置的计算方法,该方法基于天线远场幅度与相位方向图,能够快速计算出天线相位中心位置。首先建立天线相位中心位置与远场相位方向图之间的模型,然后求远场相位SSD对位置偏移的偏导,得到相位SSD的最小值以及此时的位置偏移。在计算相位中心的过程中可以根据要求选取不同的幅度加权方法,在计算结束后,通过补偿后的相位方向图来比较几种加权方法的计算效果。

A method of calculating antenna phase center position is presented based on antenna far field amplitude and phase pattern, by which the antenna phase center position can be calculated fastly. Model between the antenna phase center position and far field phase pattern is firstly set up, and the partial derivative of far field phase SSD on positon deflection is then calculated to find the minimum of phase SSD and phase deflection at this time. In course of calculating phase center, different amplitude and weighting method can be selected according to requirement. the calculating effect of using different weighting methods can be compared via compensated phase pattern after calcu-lating.