The Design and Performance of a Wideband Radio Telescope for the GAVRT Program

The Design and Performance of a Wideband Radio Telescope for the GAVRT Program

A wideband Radio Telescope was designed and built for use in the Goldstone Apple Valley Radio Telescope (GAVRT) program. It uses an existing 34-m antenna retrofitted with a tertiary offset mirror placed at the vertex of the main reflector. It can be rotated to allow using two feeds that cover the 0....

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Veröffentlicht in:IEEE transactions on antennas and propagation 2011-06, Vol.59 (6), p.1954-1962
Hauptverfasser: Imbriale, W A, Weinreb, S, Jones, G, Mani, H, Akgiray, A
Format: Artikel
Sprache:eng
Schlagworte:
Antenna feeds
Antennas
Apples
Cryogenics
Horns
Mirrors
Noise
Noise temperature
quadridge horn
radio telescope
Radio telescopes
reflector antennas
Reflectors
Retrofitting
Valleys
Wideband
wideband feeds
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Beschreibung
Zusammenfassung:A wideband Radio Telescope was designed and built for use in the Goldstone Apple Valley Radio Telescope (GAVRT) program. It uses an existing 34-m antenna retrofitted with a tertiary offset mirror placed at the vertex of the main reflector. It can be rotated to allow using two feeds that cover the 0.5-14-GHz band. The feed for 4.0-14.0 GHz is a cryogenically cooled, commercially available, open-boundary quadridge horn from ETS-Lindgren. Coverage from 0.5 to 4.0 GHz is provided by an uncooled lower frequency version of the same feed that uses a cooled LNA. The measured aperture efficiency is greater than 40% over much of the band.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2011.2123863