Comparison of the crossed and the Gregorian Mizuguchi-Dragone for wide-field millimeter-wave astronomy

Huan Tran, Adrian Lee, Shaul Hanany, Michael Milligan, Tom Renbarger

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

We compare the geometric and physical-optics performance of two configurations of offset dual-reflector antennas that obey the Mizuguchi-Dragone condition. The traditional Gregorian configuration is compared with the larger crossed configuration. These configurations are candidates for experiments that measure the polarization of the cosmic microwave background. Particular attention is given to wide-field performance and polarization fidelity. Both a ray tracer and a physical optics simulation package are used to conclude that the crossed configuration has a larger diffraction-limited field of view, but within this limit both configurations have roughly the same instrumental polarization and both show excellent cross-polarization levels, with the crossed configuration showing -10 dB better performance.

Original languageEnglish (US)
Pages (from-to)103-109
Number of pages7
JournalApplied Optics
Volume47
Issue number2
DOIs
StatePublished - Jan 10 2008

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