NEAR-FIELD-FAR-FIELD TRANSFORMATION TECHNIQUE WITH HELICOIDAL SCANNING FOR ELONGATED ANTENNAS | Zendy

Francesco D’Agostino | Zendy; Flaminio Ferrara | Zendy; Claudio Gennarelli | Zendy; Rocco Guerriero | Zendy; Massimo Migliozzi | Zendy

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NEAR-FIELD-FAR-FIELD TRANSFORMATION TECHNIQUE WITH HELICOIDAL SCANNING FOR ELONGATED ANTENNAS

Author(s) -

Francesco D’Agostino,

Flaminio Ferrara,

Claudio Gennarelli,

Rocco Guerriero,

Massimo Migliozzi

Publication year - 2008

Publication title -

progress in electromagnetics research b

Language(s) - English

Resource type - Journals

ISSN - 1937-6472

DOI - 10.2528/pierb08011503

Subject(s) - truncation (statistics) , ellipsoid , antenna (radio) , transformation (genetics) , reduction (mathematics) , field (mathematics) , prolate spheroid , near and far field , surface (topology) , optics , computer science , physics , geometry , acoustics , mathematics , mathematical analysis , telecommunications , biochemistry , pure mathematics , gene , chemistry , astronomy , machine learning

A fast and accurate near-field-far-field transformation technique with helicoidal scanning is proposed in this paper. It is tailored for elongated antennas, since a prolate ellipsoid instead of a sphere is considered as surface enclosing the antenna under test. Such an ellipsoidal modelling allows one to consider measurement cylinders with a diameter smaller than the antenna height, thus reducing the error related to the truncation of the scanning surface. Moreover, it is quite general, containing the spherical modelling as particular case, and allows a significant reduction of the number of the required nearfield data when dealing with elongated antennas. Numerical tests are reported for demonstrating the accuracy of the far-field reconstruction process and its stability with respect to random errors affecting the data

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