
Proceedings Paper
A wide-band smooth-walled feedhorn with low cross polarization for millimeter astronomyFormat | Member Price | Non-Member Price |
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Paper Abstract
We present a smooth-walled feedhorn with cross polarization and reflected power lower than -30 dB across the
entire 30% bandwidth. A prototype feedhorn has been fabricated, and the wide-band, low-cross polarization
performance has been demonstrated. The feedhorn has a circular aperture and monotonically narrows towards
an input waveguide interface. This allows it to be manufactured by progressively milling the profile using a set
of custom tools. This is especially useful in applications where a large number of feeds are desired in a planar
array format. Such applications include astronomical cameras in millimeter waveband that require large arrays
of detectors for future increases in mapping speed and sensitivity. Specifically, large arrays of feedhorns are
well-matched to the problem of measuring the polarization of the cosmic microwave background to search for
the faint signature of inflation, as they provide good beam control, the requisite sensitivity, and compatibility
with low-noise bolometric detectors.
Paper Details
Date Published: 15 July 2010
PDF: 9 pages
Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 774129 (15 July 2010); doi: 10.1117/12.857679
Published in SPIE Proceedings Vol. 7741:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)
PDF: 9 pages
Proc. SPIE 7741, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V, 774129 (15 July 2010); doi: 10.1117/12.857679
Show Author Affiliations
Lingzhen Zeng, The Johns Hopkins Univ. (United States)
Charles L. Bennett, The Johns Hopkins Univ. (United States)
Charles L. Bennett, The Johns Hopkins Univ. (United States)
David T. Chuss, NASA Goddard Space Flight Ctr. (United States)
Edward J. Wollack, NASA Goddard Space Flight Ctr. (United States)
Edward J. Wollack, NASA Goddard Space Flight Ctr. (United States)
Published in SPIE Proceedings Vol. 7741:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy V
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)
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