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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 du Canada. Herzberg en astronomie et en astrophysique
  2. Conseil national de recherches du 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
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Identificateur de l’enregistrement0dfd795d-071a-4548-9c75-93f56bf1d262
Enregistrement créé2024-06-27
Enregistrement modifié2024-06-27
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