Holland, Wayne S., Maffei, Bruno, Pisano, Giampaolo  ORCID: https://orcid.org/0000-0003-4302-5681, Ng, M. W. and Haynes, V. C.
2012.
Dielectrically embedded mesh half wave plate beam impact studies.
Presented at: Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI,
Amsterdam, The Netherlands,
3-6 July 2012.
Published in: Holland, Wayne S. and Zmuidzinas, Jonas eds.
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI (Proceedings).
Proceedings of the SPIE
, vol.8452
Bellingham, WA:
SPIE,
84520K.
10.1117/12.926683
|
Abstract
An alternative solution to classic birefringent Half Wave Plates (HWP), based on the photolithographic techniques, has been recently developed. This new device can offer a very good alternative as a polarisation modulator for future CMB polarisation instruments. However, the systematic effects that this HWP will introduce in the overall instrument need to be investigated. We present a preliminary study of the impact of this dielectrically embedded HWP on the beam shape of a corrugated horn and its performance across the beam. Using a W-band Vector Network Analyser, we measured the co- and crosspolarisation beams of the HWP-horn system and the differential phase-shift introduced by the HWP across the beam.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QB Astronomy |
| Uncontrolled Keywords: | Equipment and services; Modulators; Networks; Phase shifts; Polarization; Wave plates |
| Publisher: | SPIE |
| ISBN: | 9780819491534 |
| ISSN: | 0277-786X |
| Related URLs: | |
| Last Modified: | 25 Oct 2022 09:55 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/60493 |
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