带探头补偿近场口径场的反演与诊断

摘要

On the basis of the coupling equation of the probe and the antenna under test(AUT),diagno-ses of aperture with probe-correction in PNF is studied in this paper.The retrieval process from near field da-ta to aperture data is analyzed in detail.To prove the validity of the algorithm,an array antenna is measured. The result is compared with the amplitude and phase of aperture under no probe correction and the result of NSI software.The result indicates that the technique proves to be accurate and practical.%基于探头与被测天线之间的耦合方程，研究了带探头补偿的口径场反演算法。文章主要分析了由近场数据反推到口径场幅相数据的具体过程。为了证明算法有效性，在暗室对某阵列天线进行了算法验证。分别比较了无探头补偿的口径场分布以及美国 NSI 软件的运算结果。结果表明，该算法数值精度高，有很好的工程实用性。