An efficient approach is here presented for the evaluation of the antenna directivity from a nonredundant number of near-field measurements on a planar spiral. It can be applied whenever the power radiated by the antenna in the backward half-space is negligible and the total radiated power coincides practically with that radiated in the forward one. It makes use of a closed form formula for computing the total radiated power from the knowledge of the radiation intensity samples on the far-field sphere. These samples are determined via a probe compensated near-field - far-field transformation from measurements collected on a planar spiral and by properly using an optimal sampling interpolation formula. Numerical tests assessing the effectiveness of the proposed procedure are reported.
Antenna directivity evaluation by planar spiral scanning
D'AGOSTINO, Francesco;FERRARA, Flaminio;GENNARELLI, Claudio;GUERRIERO, ROCCO;RICCIO, Giovanni;
2006-01-01
Abstract
An efficient approach is here presented for the evaluation of the antenna directivity from a nonredundant number of near-field measurements on a planar spiral. It can be applied whenever the power radiated by the antenna in the backward half-space is negligible and the total radiated power coincides practically with that radiated in the forward one. It makes use of a closed form formula for computing the total radiated power from the knowledge of the radiation intensity samples on the far-field sphere. These samples are determined via a probe compensated near-field - far-field transformation from measurements collected on a planar spiral and by properly using an optimal sampling interpolation formula. Numerical tests assessing the effectiveness of the proposed procedure are reported.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
