The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Un transducteur orthomode à jonction en T (OMT) est un composant de guide d'ondes qui sépare deux polarisations linéaires orthogonales dans la même bande de fréquences. Il comporte un guide d'onde circulaire commun court-circuité à une extrémité et deux guides d'onde rectangulaires de dérivation disposés en sens opposés à proximité du court-circuit. L'un des avantages d'un OMT à jonction en T est sa courte longueur axiale. Cependant, les deux ports rectangulaires, qui doivent être orthogonaux, ont des performances différentes en raison de leur asymétrie. Nous proposons donc un OMT à jonction en T uniaxialement symétrique, configuré de telle sorte que les deux guides d'ondes de dérivation soient inclinés de 45 ° par rapport au court-circuit. La configuration uniaxialement symétrique permet les mêmes niveaux de performances pour les deux ports, et son adaptation d'impédance est plus facile que celle de la configuration conventionnelle. Le principe de séparation de polarisation peut être expliqué en utilisant les principes de la jonction orthomode (OMJ) et du tourniquet OMT. Sur la base des calculs, la configuration proposée a démontré une perte de réflexion de 25 dB, un XPD de 30 dB, une isolation de 21 dB entre les deux ports de dérivation et une perte de 0.25 dB, avec une bande passante de 15 % dans la bande K. L'OMT a ensuite été fabriqué en une seule pièce par impression 3D et évalué par rapport aux indices de performance calculés.
Hidenori YUKAWA
Mitsubishi Electric Corp.
Yu USHIJIMA
Mitsubishi Electric Corp.
Toru TAKAHASHI
Mitsubishi Electric Corp.
Toru FUKASAWA
Mitsubishi Electric Corp.
Yoshio INASAWA
Mitsubishi Electric Corp.
Naofumi YONEDA
Mitsubishi Electric Corp.
Moriyasu MIYAZAKI
Mitsubishi Electric Corp.
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Hidenori YUKAWA, Yu USHIJIMA, Toru TAKAHASHI, Toru FUKASAWA, Yoshio INASAWA, Naofumi YONEDA, Moriyasu MIYAZAKI, "Uniaxially Symmetrical T-Junction OMT with 45° -Tilted Branch Waveguide Ports" in IEICE TRANSACTIONS on Electronics,
vol. E107-C, no. 3, pp. 57-65, March 2024, doi: 10.1587/transele.2023ECP5013.
Abstract: A T-junction orthomode transducer (OMT) is a waveguide component that separates two orthogonal linear polarizations in the same frequency band. It has a common circular waveguide short-circuited at one end and two branch rectangular waveguides arranged in opposite directions near the short circuit. One of the advantages of a T-junction OMT is its short axial length. However, the two rectangular ports, which need to be orthogonal, have different levels of performance because of asymmetry. We therefore propose a uniaxially symmetrical T-junction OMT, which is configured such that the two branch waveguides are tilted 45° to the short circuit. The uniaxially symmetrical configuration enables same levels of performance for the two ports, and its impedance matching is easier compared to that for the conventional configuration. The polarization separation principle can be explained using the principles of orthomode junction (OMJ) and turnstile OMT. Based on calculations, the proposed configuration demonstrated a return loss of 25dB, XPD of 30dB, isolation of 21dB between the two branch ports, and loss of 0.25dB, with a bandwidth of 15% in the K band. The OMT was then fabricated as a single piece via 3D printing and evaluated against the calculated performance indices.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2023ECP5013/_p
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@ARTICLE{e107-c_3_57,
author={Hidenori YUKAWA, Yu USHIJIMA, Toru TAKAHASHI, Toru FUKASAWA, Yoshio INASAWA, Naofumi YONEDA, Moriyasu MIYAZAKI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Uniaxially Symmetrical T-Junction OMT with 45° -Tilted Branch Waveguide Ports},
year={2024},
volume={E107-C},
number={3},
pages={57-65},
abstract={A T-junction orthomode transducer (OMT) is a waveguide component that separates two orthogonal linear polarizations in the same frequency band. It has a common circular waveguide short-circuited at one end and two branch rectangular waveguides arranged in opposite directions near the short circuit. One of the advantages of a T-junction OMT is its short axial length. However, the two rectangular ports, which need to be orthogonal, have different levels of performance because of asymmetry. We therefore propose a uniaxially symmetrical T-junction OMT, which is configured such that the two branch waveguides are tilted 45° to the short circuit. The uniaxially symmetrical configuration enables same levels of performance for the two ports, and its impedance matching is easier compared to that for the conventional configuration. The polarization separation principle can be explained using the principles of orthomode junction (OMJ) and turnstile OMT. Based on calculations, the proposed configuration demonstrated a return loss of 25dB, XPD of 30dB, isolation of 21dB between the two branch ports, and loss of 0.25dB, with a bandwidth of 15% in the K band. The OMT was then fabricated as a single piece via 3D printing and evaluated against the calculated performance indices.},
keywords={},
doi={10.1587/transele.2023ECP5013},
ISSN={1745-1353},
month={March},}
Copier
TY - JOUR
TI - Uniaxially Symmetrical T-Junction OMT with 45° -Tilted Branch Waveguide Ports
T2 - IEICE TRANSACTIONS on Electronics
SP - 57
EP - 65
AU - Hidenori YUKAWA
AU - Yu USHIJIMA
AU - Toru TAKAHASHI
AU - Toru FUKASAWA
AU - Yoshio INASAWA
AU - Naofumi YONEDA
AU - Moriyasu MIYAZAKI
PY - 2024
DO - 10.1587/transele.2023ECP5013
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E107-C
IS - 3
JA - IEICE TRANSACTIONS on Electronics
Y1 - March 2024
AB - A T-junction orthomode transducer (OMT) is a waveguide component that separates two orthogonal linear polarizations in the same frequency band. It has a common circular waveguide short-circuited at one end and two branch rectangular waveguides arranged in opposite directions near the short circuit. One of the advantages of a T-junction OMT is its short axial length. However, the two rectangular ports, which need to be orthogonal, have different levels of performance because of asymmetry. We therefore propose a uniaxially symmetrical T-junction OMT, which is configured such that the two branch waveguides are tilted 45° to the short circuit. The uniaxially symmetrical configuration enables same levels of performance for the two ports, and its impedance matching is easier compared to that for the conventional configuration. The polarization separation principle can be explained using the principles of orthomode junction (OMJ) and turnstile OMT. Based on calculations, the proposed configuration demonstrated a return loss of 25dB, XPD of 30dB, isolation of 21dB between the two branch ports, and loss of 0.25dB, with a bandwidth of 15% in the K band. The OMT was then fabricated as a single piece via 3D printing and evaluated against the calculated performance indices.
ER -