An effective approach to compensate the positioning errors in a spherical near field - far field transformation for long antennas is proposed in this work. It relies on a nonredundant sampling representation of the electromagnetic fields assuming the antenna under test as enclosed in a cylinder ended in two half spheres and employs the singular value decomposition method to evaluate the near-field data at the points fixed by the nonredundant representation from the irregularly spaced ones. Once these data have been recovered, those needed by a near field - far field transformation with spherical scanning are efficiently evaluated by using an optimal sampling interpolation algorithm. Numerical tests assessing the effecttiveness of the proposed approach are shown.
Compensation of the probe positioning errors in the spherical NF – FF transformation for elongated antennas
D'AGOSTINO, Francesco;FERRARA, Flaminio;GENNARELLI, Claudio;GUERRIERO, ROCCO;MIGLIOZZI, MASSIMO;
2011-01-01
Abstract
An effective approach to compensate the positioning errors in a spherical near field - far field transformation for long antennas is proposed in this work. It relies on a nonredundant sampling representation of the electromagnetic fields assuming the antenna under test as enclosed in a cylinder ended in two half spheres and employs the singular value decomposition method to evaluate the near-field data at the points fixed by the nonredundant representation from the irregularly spaced ones. Once these data have been recovered, those needed by a near field - far field transformation with spherical scanning are efficiently evaluated by using an optimal sampling interpolation algorithm. Numerical tests assessing the effecttiveness of the proposed approach are shown.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
