An Effective NF-FF Transformation with Helicoidal Scan Tailored for Elongated Antennas: an Experimental Validation

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 5Language: englishTyp: PDF

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D’Agostino, F.; Ferrara, F.; Gennarelli, C.; Guerriero, R.; Migliozzi, M.; Riccio, G. (D. I. I. I. E. - University of Salerno, via Ponte Don Melillo, 84084 Fisciano (SA), Italy)
Fordham, J. A. (MI Technologies, 1125 Satellite Blvd, Suite 100 Suwanee, Georgia 30024-4629, USA)
Rizzo, C. (MI Technologies Europe, 3 Hither Green Southbourne Emsworth, PO10 8JA, UK)

This work concerns the experimental validation of a new near-field – far-field transformation technique with helicoidal scanning tailored for elongated antennas. Such a transformation is based on the theoretical results relevant to the nonredundant sampling representations of the electromagnetic fields and uses a proper source modelling particularly suitable to deal with this kind of antennas. By employing such an effective modelling, instead of the spherical one, it is possible to remarkably reduce the error related to the truncation of the scanning zone, since measurement cylinders with a diameter smaller than the source height can be used. The validity of this innovative scanning technique is assessed by comparing the reconstructions obtained from the data directly measured on the classical cylindrical grid with those recovered from nonredundant measurements on the helix.