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A compact high-performance orthomode transducer for the Atacama large millimeter array (ALMA) band 1 (31–45 GHz)

David Dousset, Stephane Claude and Ke Wu

Article (2013)

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Abstract

This paper describes a compact high-performance orthomode transducer (OMT) with a circular waveguide input and two rectangular waveguide outputs based on the superimposition of three aluminum blocks. Several prototypes operating in the band 1 (31–45 GHz) of the atacama large millimeter array have been fabricated and measured. The design is based on the use of a turnstile junction that is machined in a single block, requiring neither alignment nor a high degree of mechanical tolerances. Thus, a high repeatability of the design is possible for mass production. Across the 31–45 GHz band, the isolation is better than 50 dB and the return losses at the input and outputs of the OMT are better than −25 dB.

Uncontrolled Keywords

Radio astronomy, orthomode transducer (OMT), turnstile junction, polarization diplexer

Subjects: 2500 Electrical and electronic engineering > 2500 Electrical and electronic engineering
2500 Electrical and electronic engineering > 2519 Microelectronics
2500 Electrical and electronic engineering > 2520 Microwave and millimeter-wave devices, circuits and technologies
Department: Department of Electrical Engineering
Research Center: POLY-GRAMES - Advanced Research Centre in Microwaves and Space Electronics
PolyPublie URL: https://publications.polymtl.ca/4850/
Journal Title: IEEE Access (vol. 1)
Publisher: IEEE
DOI: 10.1109/access.2013.2273971
Official URL: https://doi.org/10.1109/access.2013.2273971
Date Deposited: 15 Jul 2021 13:28
Last Modified: 26 Sep 2024 23:38
Cite in APA 7: Dousset, D., Claude, S., & Wu, K. (2013). A compact high-performance orthomode transducer for the Atacama large millimeter array (ALMA) band 1 (31–45 GHz). IEEE Access, 1, 480-487. https://doi.org/10.1109/access.2013.2273971

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