A procedure for evaluating the antenna directivity from near-field measurements on a spherical scanning surface is proposed. It uses a closed form formula for computing the total radiated power from the knowledge of the radiation intensity samples on the far-field sphere. These last, which are even in number on each parallel, are determined via an efficient probe compensated near-field - far-field transformation technique based on a nonredundant sampling representation of the probe voltage. This allows one to reduce significantly the number of required data. The effectiveness of the proposed procedure is assessed by numerical simulations.
From near–field measurements to the antenna directivity
D'AGOSTINO, Francesco;FERRARA, Flaminio;GENNARELLI, Claudio;RICCIO, Giovanni
2003
Abstract
A procedure for evaluating the antenna directivity from near-field measurements on a spherical scanning surface is proposed. It uses a closed form formula for computing the total radiated power from the knowledge of the radiation intensity samples on the far-field sphere. These last, which are even in number on each parallel, are determined via an efficient probe compensated near-field - far-field transformation technique based on a nonredundant sampling representation of the probe voltage. This allows one to reduce significantly the number of required data. The effectiveness of the proposed procedure is assessed by numerical simulations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
