This letter gives the experimental assessment of a near to far-field transformation (NTFFT) technique allowing the fast and accurate reconstruction of the antenna far field from a non-redundant, i.e. minimum, number of near-field (NF) data collected through a bi-polar scanning. Such a NTFFT relies on a non-redundant sampling representation of the voltage detected by the scanning probe, attained by shaping the antenna with an oblate ellipsoid, a model suitable to deal with quasi-planar antennas, as typically are the measured ones in a planar NF facility. The NF data necessary to execute the traditional plane-rectangular NTFFT are then effectively recovered from the acquired (non-redundant) bi-polar ones by exploiting a 2-D optimal sampling interpolation formula. This makes possible to achieve a remarkable acquisition time saving, which is a very relevant outcome, because this time is nowadays much greater than that needed to carry out the NTFFT.
Fast and Accurate Far-Field Prediction by Using a Reduced Number of Bipolar Measurements
D'AGOSTINO, Francesco;FERRARA, Flaminio;GENNARELLI, Claudio;GUERRIERO, ROCCO;MIGLIOZZI, MASSIMO
2017-01-01
Abstract
This letter gives the experimental assessment of a near to far-field transformation (NTFFT) technique allowing the fast and accurate reconstruction of the antenna far field from a non-redundant, i.e. minimum, number of near-field (NF) data collected through a bi-polar scanning. Such a NTFFT relies on a non-redundant sampling representation of the voltage detected by the scanning probe, attained by shaping the antenna with an oblate ellipsoid, a model suitable to deal with quasi-planar antennas, as typically are the measured ones in a planar NF facility. The NF data necessary to execute the traditional plane-rectangular NTFFT are then effectively recovered from the acquired (non-redundant) bi-polar ones by exploiting a 2-D optimal sampling interpolation formula. This makes possible to achieve a remarkable acquisition time saving, which is a very relevant outcome, because this time is nowadays much greater than that needed to carry out the NTFFT.File | Dimensione | Formato | |
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Descrizione: 1536-1225 © 2017 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. Link editore: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8047318
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