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R. G. Yaccarino, Y. R. Samii and L. I. Williams, “The Bi- Polar Planar Near-Field Measurement Technique, Part II: Near-Field to Far-Field Transformation and Holographic Imaging Methods,” IEEE Transactions on Antennas and Propagation, Vol. 42, No. 2, 1994, pp. 196-204. doi:10.1109/8.277213

has been cited by the following article:

• TITLE: Spherical Near-Field - Far-Field Transformation for Quasi-Planar Antennas from Irregularly Spaced Data

  AUTHORS: Francesco D’ Agostino, Flaminio Ferrara, Claudio Gennarelli, Rocco Guerriero, Massimo Migliozzi

  KEYWORDS: Antenna Measurements; Near-Field - Far-Field Transformations; Spherical Scanning; Nonredundant Sampling Representations of Electromagnetic Fields; Probe Positioning Errors Compensation

  JOURNAL NAME: Journal of Electromagnetic Analysis and Applications, Vol.4 No.4, April 24, 2012

  ABSTRACT: An effective near-field - far-field (NF - FF) transformation with spherical scanning for quasi-planar antennas from irregularly spaced data is developed in this paper. Two efficient approaches for evaluating the regularly spaced spherical samples from the nonuniformly distributed ones are proposed and numerically compared. Both the approaches rely on a nonredundant sampling representation of the voltage measured by the probe, based on an oblate ellipsoidal modelling of the antenna under test. The former employs the singular value decomposition method to reconstruct the NF data at the points fixed by the nonredundant sampling representation and can be applied when the irregularly acquired samples lie on nonuniform parallels. The latter is based on an iterative technique and can be used also when such a hypothesis does not hold, but requires the existence of a biunique correspondence between the uniform and nonuniform samples, associ- ating at each uniform sampling point the nearest irregular one. Once the regularly spaced spherical samples have been recovered, the NF data needed by a probe compensated NF - FF transformation with spherical scanning are efficiently evaluated by using an optimal sampling interpolation algorithm. It is so possible to accurately compensate known posi- tioning errors in the NF - FF transformation with spherical scanning for quasi-planar antennas. Some numerical tests assessing the accuracy and the robustness of the proposed approaches are reported.