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 excel...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2013-03, Vol.61 (3), p.1099-1108
Main Authors: Akgiray, A., Weinreb, S., Imbriale, W. A., Beaudoin, C.
Format: Article
Language:English
Subjects:
Antennas
Aperture antennas
Applied sciences
Astronomical and space-research instrumentation
Astronomy
Bandwidth
Computational efficiency
Cutoff frequency
Earth, ocean, space
Exact sciences and technology
Feeds
Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations
Horn antennas
Horns
Mathematical analysis
Noise temperature
Radio astronomy
Radio telescopes
Radio telescopes and instrumentation
heterodyne receivers
Radiocommunications
reflector antenna feeds
reflector antennas
ridge waveguides
Telecommunications
Telecommunications and information theory
ultrawideband antennas
Wideband
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Summary: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.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2012.2229953