An effective procedure to correct known positioning errors of the measurement probe in a bi-polar near to far-field (NFTFF) transformation for quasi-planar antennas, requiring a minimum number of NF data, is developed and experimentally assessed. The NFTFF transformation exploits a nonredundant sampling representation of the probe measured voltage got by assuming the antenna as enclosed in a surface made by two circular bowls with the same aperture (double bowl). The uniform bi-polar samples, i.e. the voltages at the points fixed by the representation, are precisely recovered from the not correctly spaced ones via a singular value decomposition based approach. Then, a 2-D optimal sampling interpolation formula is used to accurately reconstruct the NF data necessary for the plane-rectangular NFTFF transformation from the retrieved nonredundant uniform samples
Laboratory Testing of a SVD-Based Approach to Recover the Nonredundant Bi-Polar NF Data from the Positioning Error Affected Ones
D’Agostino Francesco;Ferrara Flaminio;Gennarelli Claudio;Guerriero rocco;Migliozzi Massimo
2017-01-01
Abstract
An effective procedure to correct known positioning errors of the measurement probe in a bi-polar near to far-field (NFTFF) transformation for quasi-planar antennas, requiring a minimum number of NF data, is developed and experimentally assessed. The NFTFF transformation exploits a nonredundant sampling representation of the probe measured voltage got by assuming the antenna as enclosed in a surface made by two circular bowls with the same aperture (double bowl). The uniform bi-polar samples, i.e. the voltages at the points fixed by the representation, are precisely recovered from the not correctly spaced ones via a singular value decomposition based approach. Then, a 2-D optimal sampling interpolation formula is used to accurately reconstruct the NF data necessary for the plane-rectangular NFTFF transformation from the retrieved nonredundant uniform samplesI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.