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Design of Wideband Quad-Ridged Waveguide Orthomode Transducer at L-Band.

Design of Wideband Quad-Ridged Waveguide Orthomode Transducer at L-Band.

Authors :
Jin Fan
Yihua Yan
Chengjin Jin
Dezhi Zhan
Jirun Luo
Source :
Progress in Electromagnetics Research C; 2017, Vol. 72, p115-122, 8p
Publication Year :
2017

Abstract

In this paper, an L-band wideband quad-ridged waveguide orthomode transducer (OMT) for the Five hundred meter Aperture Spherical radio Telescope (FAST) is presented with a simple design principle. By designing two critical parts of the OMT separately and introducing matching rings into two orthogonal probes, an improved wideband performance has been realized successfully. The OMT is designed to operate across the 0.95GHz-1.9GHz band, and the simulation shows a return loss better than -20 dB for both polarizations, cross-polarized isolation levels over 45 dB and insertion loss lower than 0.15 dB over the entire bandwidth. The measured results are in good agreement with the simulations. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19378718
Volume :
72
Database :
Complementary Index
Journal :
Progress in Electromagnetics Research C
Publication Type :
Academic Journal
Accession number :
122275819
Full Text :
https://doi.org/10.2528/pierc17010802