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Phaseless bi-polar planar near-field measurements and diagnostics of array antennas

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2 Author(s)
Yaccarino, R.G. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Rahmat-Samii, Y.

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

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:47 ,  Issue: 3 )

Date of Publication:

Mar 1999

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