Application of the SWE-to-PWE antenna diagnostics technique to an offset reflector antenna

Cecilia Cappellin, A Frandsen, Olav Breinbjerg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A new antenna diagnostics technique has been developed for the DTU-ESA Spherical Near-Field Antenna Test Facility at the Technical University of Denmark. The technique is based on the transformation of the Spherical Wave Expansion (SWE) of the radiated field, obtained from a spherical near-field measurement, to the Plane Wave Expansion (PWE), and it allows an accurate reconstruction of the field in the extreme near-field region of the antenna under test (AUT), including the aperture field. While the fundamental properties of the SWE-to-PWE transformation, as well as the influence of finite measurement accuracy, have been reported previously, we validate here the new antenna diagnostics technique through an experimental investigation of a commercially available offset reflector antenna, where a tilt of the feed and surface distortions are intentionally introduced. The effects of these errors will be detected in the antenna far-field pattern, and the accuracy and ability of the diagnostics technique to subsequently identify them will be investigated. Real measurement data will be employed for each test case.
Original languageEnglish
Title of host publicationAntenna Measurements Technique Association Symposium
Number of pages7
Publication date2007
Publication statusPublished - 2007
Event29th Annual Meeting and Symposium of the Antenna Measurement Techniques Association - St. Louis, MO, United States
Duration: 4 Nov 20079 Nov 2007
Conference number: 29

Conference

Conference29th Annual Meeting and Symposium of the Antenna Measurement Techniques Association
Number29
CountryUnited States
CitySt. Louis, MO
Period04/11/200709/11/2007

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