Probe compensated far-field reconstruction by near-field planar spiral scanning

Author

Bucci, O.M. ; D´Agostino, F. ; Gennarelli, C. ; Riccio, G. ; Savarese, C.

Author_Institution

Dipt. di Ingegneria Elettronica, Universita Federico II, Napoli, Italy

Volume

149

Issue

2

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

119

Lastpage

123

Abstract

An efficient probe-compensated near-field/far-field transformation technique with planar spiral scanning is proposed, which uses a minimum amount of data. A non-redundant sampling representation of the probe output voltage on a planar spiral and a fast, accurate and stable interpolation algorithm are developed. By choosing the angular step of the spiral coincident with the sample spacing needed to interpolate such a voltage on a radial line, it is possible to reconstruct the data required by the standard probe-compensated plane-rectangular near-field/far-field transformation technique. The use of an open-ended cylindrical waveguide as scanning probe allows probe co-rotation to be avoided. Numerical examples are reported, assessing the accuracy and the stability of the far-field reconstruction process

Keywords

antenna radiation patterns; antenna testing; circular waveguides; compensation; interpolation; probes; transforms; waveguide theory; angular step; interpolation algorithm; near-field planar spiral scanning; nonredundant sampling representation; open-ended cylindrical waveguide; probe co-rotation; probe compensated far-field reconstruction; probe output voltage; probe-compensated near-field/far-field transformation technique; probe-compensated plane-rectangular near-field/far-field transformation technique; sample spacing; scanning probe; stability;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20020265

Filename

1019778