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A turnstile quad-ridge orthomode transducer (OMT) for octave-bandwidth receiver front-ends (24–51 GHz)

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1109/TMTT.2023.3267544
AuteurRechercher : 1Identifiant ORCID : https://orcid.org/0000-0001-7732-5178; Rechercher : 2; Rechercher : 2; Rechercher : 1; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-9342-9003
Affiliation
  1. Conseil national de recherches Canada. Herzberg en astronomie et en astrophysique
  2. Conseil national de recherches Canada. Services de conception et de fabrication
FormatTexte, Article
Sujetdouble-ridge waveguide; octave bandwidth; orthomode transducer (OMT); polarization; Q-band; quad-ridge waveguide; quad-ridge waveguide turnstile junction; ridge waveguide; waveguide components; waveguide junctions; wide bandwidth receivers
Résumé
We report on the design, fabrication, and measured results of a turnstile quad-ridge orthomode transducer (OMT) suitable for millimeter-wavelength receivers used in radio telescopes for astronomy. The quad-ridge OMT is directly compatible with a quad-ridge feed horn to implement dual-polarization low-noise receivers that exceed the single-mode bandwidth of a rectangular waveguide. Using a bandwidth of 24–51 GHz, the OMT demonstrated an insertion loss of 0.3–0.4 dB along with cross-polarization leakage and isolation below −40 dB. An OMT is a key part of a dual polarization receiver front-end, and our long-term goal is to realize low-noise, wideband receivers for radio astronomy utilizing ridge waveguides throughout the entire front-end. Design details are provided for each ridge waveguide feature within the OMT, including a quad-ridge waveguide turnstile junction, E-plane bend, and E-plane T-junction. To facilitate future layouts and integration, additional ridge waveguide component designs have been included for a 3-dB coupler, H-plane bend, and H-plane T-junction.
Date de publication
Maison d’éditionIEEE
Dans
  • IEEE Transactions on Microwave Theory and Techniques 71, nº 11 (28 avril 2023) : 4906–4921.
Langueanglais
Publications évaluées par des pairsOui
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Identificateur de l’enregistrement0dfd795d-071a-4548-9c75-93f56bf1d262
Enregistrement créé2024-06-27
Enregistrement modifié2024-06-27
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