Circular polariser for use in a gyro‐travelling wave amplifier. Issue 11 (1st August 2013)

• Record Type: Journal Article
• Authors: Robertson, Craig W.; Young, Alan R.; Ronald, Kevin; Cross, Adrian W.; Whyte, Colin G.
• Is Part Of: IET microwaves, antennas & propagation. Volume 7:Issue 11(2013)
• Page Start: 942
• Page End: 948
• Publication Date: 2013-08-01
• Subjects: electromagnetic wave polarisation -- rectangular waveguides -- travelling wave amplifiers -- waveguide polarisers; circular polariser -- gyro‐travelling wave amplifier -- corrugated rectangular waveguide -- radio frequency antennas applications -- waveguide transducer -- broadband circularly‐polarised radiation -- Ka‐band frequency range -- computer simulations -- CST Microwave Studio -- return loss -- elliptical converter -- broadband performance -- Ka‐band gyro‐TWA experiment -- frequency 26 GHz to 40 GHz; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2012.0415
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : 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.