天线时域平面近场测试的误差分析

天线时域近场测试技术对误差体系研究的缺失，导致测试结果的不确定度分析一直无法完成.为解决这一问题，以天线时域平面近场测试为例，对时域近场测试的误差进行研究，给出时域测试区别于频域测试技术的四个误差项:探头调制误差、信号源稳定度误差、时间采样间隔误差、时间采样长度误差.在给出误差项后，对误差的产生机理进行了讨论，通过仿真和实测给出了误差对测试结果的影响.

Error analysis on time domain planar near-field antenna measurement

Due to less researches on the error terms, the uncertainty analysis of the test results in time domain near-field antenna measurement remains uncompleted.To solve this problem, this paper presents four error terms which are ignored or inexistent in frequency domain near-field antenna measurement: probe modulation error, source stability error, time sampling interval error and time sampling length error, and the mechanisms of these errors are discussed.Finally, influence of the errors on the experimental results is present by simulation and test after the error terms are given.