This communication deals with the experimental validation of an effective near-field-far-field (NF-FF) transformation with planar spiral scanning. Such a technique, suitable for volumetric antennas, uses a reduced number of NF samples, which are collected along a planar spiral whose step is uniform to make easier the control of the velocity of the involved linear positioner. The NF data needed by the standard plane-rectangular NF-FF transformation are accurately reconstructed from the acquired spiral samples by employing an efficient two-dimensional optimal sampling interpolation (OSI) algorithm, which has been developed, by choosing the spiral step coincident with the sampling spacing needed to interpolate along a radial line, according to the spatial band-limitation properties of electromagnetic fields, and by arranging a proper non-redundant representation along such a spiral. Some experimental tests results are reported to assess the effectiveness of the FF reconstruction process.

Practical feasibility of a NF-FF transformation with uniform planar spiral scan for quasi-spherical AUTs

D'Agostino F.;Ferrara F.;Gennarelli C.;Guerriero R.;Migliozzi M.;Riccio G.
2021-01-01

Abstract

This communication deals with the experimental validation of an effective near-field-far-field (NF-FF) transformation with planar spiral scanning. Such a technique, suitable for volumetric antennas, uses a reduced number of NF samples, which are collected along a planar spiral whose step is uniform to make easier the control of the velocity of the involved linear positioner. The NF data needed by the standard plane-rectangular NF-FF transformation are accurately reconstructed from the acquired spiral samples by employing an efficient two-dimensional optimal sampling interpolation (OSI) algorithm, which has been developed, by choosing the spiral step coincident with the sampling spacing needed to interpolate along a radial line, according to the spatial band-limitation properties of electromagnetic fields, and by arranging a proper non-redundant representation along such a spiral. Some experimental tests results are reported to assess the effectiveness of the FF reconstruction process.
978-88-31299-02-2
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4765722
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