NDLI: Phaseless Measurements Over Nonrectangular Planar Near-Field Systems Without Probe Corotation

Content Provider	IEEE Xplore Digital Library
Author	Razavi, S.F. Rahmat-Samii, Y.
Copyright Year	1963
Abstract	The need for acquiring the near-field phase with a high precision has imposed a stringent condition for measuring the antennas pattern at high frequencies in indoor facilities. The phaseless near-field techniques are introduced to overcome the necessity of operating with costly high frequency vector instruments. Many algorithms are proposed by the researchers and among them the Iterative Fourier technique is proved a viable solution for planar near-field systems. This paper discusses a difficulty in implementing this technique in nonrectangular facilities, such as plane-polar and bipolar, and introduces an iterative algorithm to alleviate it. The measurement of the co and cross-polarized field necessitates the corotation of the probe with the antenna under test to maintain the polarization, for all the nonrectangular planar systems. The corotation increases the hardware complexity of these measurement systems. Therefore the proposed algorithm which alleviates the probe corotation can significantly simplify the hardware involved. The convergence and stability of the proposed algorithm is studied and it is shown how one can control them. The developed algorithm is implemented using simulated near-field for two different types of antennas. The applicability of this algorithm is also assessed by employing a bipolar phaseless near-field measurement.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	143
Ending Page	152
Page Count	10
File Size	2767613
File Format	PDF
ISSN	0018926X
Volume Number	61
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Probes Antenna measurements Phase measurement Antennas Iterative methods Open systems Measurement uncertainty probe corotation Iterative Fourier techniques phaseless measurements planar near-field measurements
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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