Resilience to Probe-Positioning Errors in Planar
Resilience to Probe-Positioning Errors in Planar
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发表时间：
2010
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通讯作者：
S. Razavi;Y. Rahmat-Samii
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作者：
S. Razavi;Y. Rahmat-Samii
无相技术已经在天线测量社区中被讨论，并且这些技术背后的理论在文献中被很好地解释。噪声和测量误差的存在的问题没有详细研究，以提供强大的推动力的无相位测量的重要性。本文对高、中、低副瓣天线的近场进行了仿真，并给出了一些实际情况。探头定位误差的影响进行了研究，通过实施随机误差的模拟探头样品的位置沿着不同的轴。本文还提出了一种新的方法，将探针高度定位误差引入阵列天线的实际近场测量中。它还说明了如何定位误差可以扭曲的相位分布。通过构造的远场图案的详细表征，迭代傅立叶技术的鲁棒性，即使在非常高的探头定位误差的存在下，证明。它示出了如何利用一个无相技术可以显着减少探头定位误差的影响。与常用的振幅和相位近场测量技术提取的结果进行了比较，并说明了明显的改善。
The phaseless techniques have been discussed in the antenna measurements community and the theories behind these techniques are well explained in literature. The issue of the noise and the presence of measurement errors are not investigated in details to provide strong impetus to the importance of phaseless measurements. In this paper the near-fields of a number of dif- ferent types of antennas with high, medium and low side lobes are simulated to create some realistic cases. The probe positioning error effects are investigated by implementing random errors in the position of the simulated probe samples along different axes. A novel method is also adopted to incorporate the probe-height posi- tioning error in an actual near-field measurement of an array an- tenna. It is also illustrated how the positioning errors can distort the phase distributions. Through detailed characterizations of the constructed far-field patterns, robustness of the Iterative Fourier technique even at the presence of very high probe positioning er- rors is demonstrated. It is shown how the utilization of a phaseless technique can significantly reduce the effects of probe positioning errors. The results are compared with the results extracted from the commonly used amplitude and phase near-field measurement techniques and the clear improvements are illustrated.