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Published March 2013 | public
Journal Article

Circular Quadruple-Ridged Flared Horn Achieving Near-Constant Beamwidth Over Multioctave Bandwidth: Design and Measurements


A circular quadruple-ridged flared horn achieving almost-constant beamwidth over 6:1 bandwidth is presented. This horn is the first demonstration of a wideband feed for radio telescopes which is capable of accommodating different reflector antenna optics, maintains almost constant gain and has excellent match. Measurements of stand-alone horn performance reveal excellent return loss performance as well as stable radiation patterns over 6:1 frequency range. Physical optics calculations predict an average of 69% aperture efficiency and 13 K antenna noise temperature with the horn installed on a radio telescope.

Additional Information

© 2013 IEEE. Manuscript received January 21, 2012; revised June 02, 2012; accepted November 09, 2012. Date of publication November 27, 2012; date of current version February 27, 2013. This work was supported in part by NSF Grant AST-0431486 through Cornell University for the SKA Technical Development Program. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA, under a contract with the National Aeronautics and Space Administration.

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October 23, 2023