天线相位中心暗室标定法远场条件研究

Research on Far-Field Range Requirement of Antenna Phase Center Anechoic Chamber Calibration Method

将有限测试距离引入的测相误差公式由一维辐射源拓展到二维口径辐射源。与传统相位方向图误差分析中只考虑单一方向上测相绝对误差的方法不同,提出全新的基于保证有限测试距离处不同方向相位差与远场相位差一致的有限测试距离相位中心测量误差分析方法。利用文献[6]的天线相位中心暗室测量方法,对有限距离引入的误差进行了数值分析,从而得到满足一定精度要求的远场测量条件。以实际天线相位中心标定例子说明了分析方法的正确性。

The formula of measured phase-error caused by finite test distance is expanded from one-dimension radiator source to two-dimension radiator source. Different from the traditional method which only studies the absolute phase error of one single direction, a new method based on the attempt to reconcile the phase error of different directions at finite measurement distance with that of far field is presented. Based on the antenna phase center anechoic chamber calibration method introduced by the paper[6],the phase error induced by finite measurement distance is numerically analized.so as to find conditions to satisfy some phase error accuracy during finite distance measurement. Two antenna phase center calibration examples are provided to verify the accuracy of the analysis method.