天线时域平面近场测试的信号源误差修正

Error Correction for Source of Time Domain Antenna Planar Near-Field Measurement

提出了天线时域平面近场测试中信号源稳定度误差的修正方法.建立了误差修正所需的参考信道,分析了信号源误差所包含的误差项,根据时域近场测试对采样信号进行近场重建和近远场变换的两种方式,分别给出时域-频域结合修正和纯时域修正的两种修正方法,针对信号源误差包含的误差项对采样信号进行修正.实测结果证明修正后得到的频域方向图和时远场波形与参考结果都比较吻合,证明了两种修正方法的正确性.

A correction method for source stability error in time domain antenna planar near-field test was proposed.Firstly,a reference channel was built for error correction to analyze the items included in source error.Then,considering two methods for near-field reconstruction and near/far-field translation in time domain measurement,methods called time domain-frequency domain combining correction and time domain correction were developed respectively,which could correct error in sampling signal caused by stability error of source.Finally,practical measurements were implemented for the method.Results show that,the modified frequency-domain pattern and the time domain waveform are in better agreement with the reference results,which proves the correctness of the two correction methods.