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Published June 2011 | public
Journal Article

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 0.5–14-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.

Additional Information

© 2011 IEEE. Manuscript received January 03, 2010; revised January 30, 2011; accepted January 31, 2011. Date of publication March 14, 2011; date of current version June 02, 2011. This work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, under a contract with the National Aeronautics and Space Administration. The authors would like to acknowledge M. Britcliffe for the original idea to put a parabola and feed at the vertex of the 34-m antenna.

Additional details

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