Open AccessCircular polariser for use in a gyro‐travelling wave amplifier
Author(s) -
Robertson Craig W.,
Young Alan R.,
Ronald Kevin,
Cross Adrian W.,
Whyte Colin G.
Publication year - 2013
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2012.0415
Subject(s) - broadband , polarizer , bandwidth (computing) , microwave , optics , return loss , axial ratio , amplifier , transducer , frequency band , acoustics , physics , engineering , electrical engineering , circular polarization , telecommunications , microstrip , birefringence , antenna (radio)
A corrugated rectangular waveguide, commonly used in radio frequency antennas applications, was considered for use in a gyro‐TWA experiment. This waveguide transducer produced broadband circularly polarised radiation in the Ka‐band frequency range (26–40 GHz). Computer simulations, using computer simulation technology Microwave Studio ® , were carried out and predicted return losses exceeding 30 dB and a 6° phase variation for 20% bandwidth centred at 31 GHz. Comparison between experimental measurements and simulations showed good agreement. The performance of this polariser was also compared to that of a conventional elliptical converter. Owing to its broadband performance the authors consider some of the technical aspects of applying this component to a Ka‐band gyro‐TWA experiment.