Title :
Circular Quadruple-Ridged Flared Horn Achieving Near-Constant Beamwidth Over Multioctave Bandwidth: Design and Measurements
Author :
Akgiray, A. ; Weinreb, S. ; Imbriale, W.A. ; Beaudoin, C.
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA, USA
fDate :
3/1/2013 12:00:00 AM
Abstract :
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.
Keywords :
horn antennas; radiotelescopes; circular quadruple-ridged flared horn; multioctave bandwidth; near-constant beamwidth; radio telescopes; reflector antenna optics; stand-alone horn performance; temperature 13 K; Aperture antennas; Bandwidth; Cutoff frequency; Feeds; Horn antennas; Radio astronomy; Aperture antennas; horn antennas; radio astronomy; reflector antenna feeds; reflector antennas; ridge waveguides; ultrawideband antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2229953
