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A Quadraxial Feed for Ultra-Wide Bandwidth Quadruple-Ridged Flared Horn Antennas

Theunis S. Beukman ; Marianna Ivashina (Institutionen för signaler och system, Antenner) ; Rob Maaskant (Institutionen för signaler och system, Antenner) ; Petrie Meyer ; Carlo Bencivenni (Institutionen för signaler och system, Antenner)
8th European Conference on Antennas and Propagation, EuCAP 2014, The Hague, The Netherlands 6-11 April 2014 (2164-3342). p. 3312 - 3316 . (2014)
[Konferensbidrag, refereegranskat]

A quadraxial feed, excited by two orthogonal differential modes, is proposed for ultra wideband quadruple-ridged flared horn (QRFH) antennas that obviates the need for a balun. It is shown that in this configuration the fundamental TE11 mode is most strongly excited over the entire frequency band, while the higher-order modes are significantly suppressed, as compared to the conventional excitation using the ridge-to-coax balun transition. These properties lead to several advantages for QRFH antenna applications which require frequency-invariant beam characteristics, high port isolation and low cross-polarisation level, such as e.g. reflector antenna feeds for future radio telescopes.

Nyckelord: Quadruple-ridged waveguides; Radio astronomy; Reflector antenna feeds; Ultra wideband antennas

Article number 6902537

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Denna post skapades 2014-10-06. Senast ändrad 2017-03-21.
CPL Pubid: 203787


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Institutioner (Chalmers)

Institutionen för signaler och system, Antenner (2005-2014)


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