Phaseless bi-polar planar near-field measurements and diagnostics of array antennas
Phaseless bi-polar planar near-field measurements and diagnostics of array antennas
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DOI：
10.1109/8.768794
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发表时间：
1999-03
影响因子：
5.7
通讯作者：
R. G. Yaccarino;Y. Rahmat-Samii
中科院分区：
文献类型：
--
作者：
R. G. Yaccarino;Y. Rahmat-Samii
天线近场测量通常需要非常精确的近场相位测量。在某些应用中，实际上可能无法实现精确的相位测量。当无法直接测量相位时，无相测量开始作为替代微波天线测量技术出现。成功实施无相测量算法有许多重要方面。本文提出了适当的无相位测量要求和专为双极平面近场天线测量技术定制的相位恢复算法。两次幅度测量和平方幅度最佳采样插值方法与迭代傅立叶过程相结合，首先检索相位信息，然后构建被测天线的远场方向图和诊断特性。为了严格检验本文开发的方法，提出了两种不同阵列天线的无相位测量结果，并将其与直接测量近场幅度和相位时获得的结果进行比较。
Antenna near-field measurements typically require very accurate measurement of the near-field phase. There are applications where an accurate phase measurement may not be practically achievable. Phaseless measurements are beginning to emerge as an alternative microwave antenna measurements technique when phase cannot be directly measured. There are many important aspects for successful implementation of a phaseless measurement algorithm. This paper presents appropriate phaseless measurement requirements and a phase retrieval algorithm tailored for the bi-polar planar near-field antenna measurement technique. Two amplitude measurements and a squared amplitude optimal sampling interpolation method are integrated with an iterative Fourier procedure to first retrieve the phase information and then construct both the far-field pattern and diagnostic characteristics of the antenna under test. In order to critically examine the methodologies developed in this paper, phaseless measurement results for two different array antennas are presented and compared to results obtained when the near-field amplitude and phase are directly measured.