Circular Quadruple-Ridged Flared Horn Achieving Near-Constant Beamwidth Over Multioctave Bandwidth: Design and Measurements
- Resource Type
- Periodical
- Authors
- Akgiray, A.; Weinreb, S.; Imbriale, W. A.; Beaudoin, C.
- Source
- IEEE Transactions on Antennas and Propagation IEEE Trans. Antennas Propagat. Antennas and Propagation, IEEE Transactions on. 61(3):1099-1108 Mar, 2013
- Subject
- Fields, Waves and Electromagnetics
Aerospace
Transportation
Components, Circuits, Devices and Systems
Cutoff frequency
Bandwidth
Feeds
Horn antennas
Aperture antennas
Radio astronomy
horn antennas
radio astronomy
reflector antenna feeds
reflector antennas
ridge waveguides
ultrawideband antennas
- Language
- ISSN
- 0018-926X
1558-2221
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.