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Proceedings Paper

Study of corrugated Winston horns
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Paper Abstract

Smooth walled Winston horns have been extensively used as light collectors for bolometric instruments. Used in multimoded operation without a waveguide, the beam shape is top-hat like and a simple equation is sufficient to define its Full Width Half Max. On the other hand, it is well known that corrugated feed horns are more efficient than smooth walled horns and much better well behaved with respect to polarization characteristics and sidelobe rejection. We present in this paper a study of corrugated Winston feed horns which could be used for future Astronomical instruments devoted to Cosmic Microwave Background (CMB) polarization measurements. We show that in this case low cross-polarization can be expected in single moded operation and that they could produce lower sidelobes levels compared to conical or profile shapes.

Paper Details

Date Published: 8 October 2004
PDF: 6 pages
Proc. SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, (8 October 2004); doi: 10.1117/12.552922
Show Author Affiliations
Bruno Maffei, Cardiff Univ. (United Kingdom)
Emily Gleeson, National Univ. of Ireland/Maynooth (Ireland)
J. Anthony Murphy, National Univ. of Ireland/Maynooth (Ireland)
Giampaolo Pisano, Cardiff Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 5498:
Millimeter and Submillimeter Detectors for Astronomy II
Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington, Editor(s)

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