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2015-06-09

Matrix Method for Far-Field Calculation Using Irregular Near-Field Samples for Cylindrical and Spherical Scanning Surfaces

By Mohamed Farouq, Mohammed Serhir, and Dominique Picard
Progress In Electromagnetics Research B, Vol. 63, 35-48, 2015
doi:10.2528/PIERB15040905

Abstract

A matrix method which takes into account the probe positioning errors in cylindrical and spherical near-field (NF) measurement techniques is proposed. The near-field irregularities made impossible the determination of the cylindrical or spherical wave expansion from the measured data using classical techniques based on 2D Discrete Fourier Transformation (2D-DFT) in cylindrical case (CC) and orthogonality properties in spherical case (SC). The irregularities can be randomly distributed but known and the matrix method expresses the linear relation between the measured near-field and the corresponding cylindrical or spherical modal expansion coefficients. Once the coefficients of the cylindrical and the spherical wave expansions are known the far-field of the antenna under test (AUT) is easily determined. Accuracy of the matrix method is numerically studied as a function of the irregularities magnitude and for different noise levels (data Signal to Noise Ratio). Also, experimental results have shown the efficiency of the proposed technique.

Citation


Mohamed Farouq, Mohammed Serhir, and Dominique Picard, "Matrix Method for Far-Field Calculation Using Irregular Near-Field Samples for Cylindrical and Spherical Scanning Surfaces," Progress In Electromagnetics Research B, Vol. 63, 35-48, 2015.
doi:10.2528/PIERB15040905
http://www.jpier.org/PIERB/pier.php?paper=15040905

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