Phaseless spherical near-field antenna measurements: Concept, algorithm and simulation

Author

Schmid, Carsten H. ; Rahmat-Samii, Yahya

fYear

2009

fDate

1-5 June 2009

Firstpage

1

Lastpage

4

Abstract

A novel phaseless near-field far-field transformation algorithm for spherical antenna measurements has been presented. The algorithm expands the radiated AUT field distribution in spherical harmonics and the missing phase information is retrieved in an iterative manner from an additional amplitude measurement on a second sphere. The spherical phase retrieval algorithm has been verified using simulated near-field data of a patch antenna and showed good performance. The avoidance of phase measurements, especially at high frequencies, allows antenna near-field measurements with reduced constraints in terms of instrumentation and probe positioning accuracy.

Keywords

antenna radiation patterns; microstrip antennas; amplitude measurement; missing phase information; patch antenna; phaseless near-field far-field transformation algorithm; phaseless spherical near-field antenna measurements; probe positioning accuracy; spherical harmonics; spherical phase retrieval algorithm; Antenna measurements; Convergence; Directive antennas; Gain measurement; Information retrieval; Iterative algorithms; Near-field radiation pattern; Patch antennas; Phase measurement; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE

Conference_Location

Charleston, SC

ISSN

1522-3965

Print_ISBN

978-1-4244-3647-7

Type

conf

DOI

10.1109/APS.2009.5171897

Filename

5171897