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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 Wu Ke

Article (2013)

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Cite this document: Dousset, D., Claude, S. & Ke, W. (2013). A compact high-performance orthomode transducer for the Atacama large millimeter array (ALMA) band 1 (31–45 GHz). IEEE Access, 1, p. 480-487. doi:10.1109/access.2013.2273971
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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

Open Access document in PolyPublie
Subjects: 2500 Génie électrique et électronique > 2500 Génie électrique et électronique
2500 Génie électrique et électronique > 2519 Microélectronique
2500 Génie électrique et électronique > 2520 Dispositifs, circuits et technologie hyperfréquences et d'ondes millimétriques
Department: Département de génie électrique
Research Center: POLY-GRAMES - Centre de recherche avancée en micro-ondes et en électronique spatiale
Date Deposited: 15 Jul 2021 13:28
Last Modified: 16 Jul 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4850/
Document issued by the official publisher
Journal Title: IEEE Access (vol. 1)
Publisher: IEEE
Official URL: https://doi.org/10.1109/access.2013.2273971

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