Study of corrugated Winston horns

Maffei, Bruno, Gleeson, Emily, Murphy, J. Anthony and Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681 2004. Study of corrugated Winston horns. Presented at: SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy II, Glasgow, 21 June 2004. Published in: Zmuidzinas, Jonas, Holland, Wayne S. and Withington, Stafford eds. Proceeds SPIE 5498, Millimeter and Submillimeter Detectors for Astronomy. , vol.5498 The International Society for Optical Engineering, p. 812. 10.1117/12.552922

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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

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	Astronomical instrumentation; Equipment and services; Polarization; Waveguides
Additional Information:	From Conference Volume 5498. Millimeter and Submillimeter Detectors for Astronomy II / Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington, 2004.
Publisher:	The International Society for Optical Engineering
ISSN:	0277-786X
Last Modified:	27 Oct 2022 08:18
URI:	https://orca.cardiff.ac.uk/id/eprint/61902

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