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
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118
La courbure simple d'une paire de lignes de transmission différentielles provoque une différence de trajet, qui conduit à une conversion du mode différentiel au mode commun en raison de la différence de phase. Cette conversion peut entraîner de graves problèmes de bruit en mode commun. Nous avons précédemment proposé une courbure conique asymétrique étroitement couplée pour supprimer la conversion du mode différentiel direct vers le mode commun et avons dérivé les conditions de contrainte pour le câblage haute densité. Cependant, pour fournir une suppression suffisante de la conversion de mode, une correction supplémentaire était nécessaire pour faire disparaître la différence de marche effective. Cet article propose une méthodologie de conception pratique et simple en utilisant un coude très étroitement couplé (diminuant la largeur de ligne et la séparation des lignes du coude étroitement couplé). Les simulations pleine onde inférieures à 20 GHz ont démontré qu'une suppression suffisante de la conversion du mode différentiel direct en mode commun est obtenue avec succès comme prévu. Les mesures ont montré que notre méthodologie de conception est efficace.
Chenyu WANG
Okayama University
Kengo IOKIBE
Okayama University
Yoshitaka TOYOTA
Okayama University
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Chenyu WANG, Kengo IOKIBE, Yoshitaka TOYOTA, "Practical Design Methodology of Mode-Conversion-Free Tightly Coupled Asymmetrically Tapered Bend for High-Density Differential Wiring" in IEICE TRANSACTIONS on Communications,
vol. E104-B, no. 3, pp. 304-311, March 2021, doi: 10.1587/transcom.2020EBP3056.
Abstract: The plain bend in a pair of differential transmission lines causes a path difference, which leads to differential-to-common mode conversion due to the phase difference. This conversion can cause serious common-mode noise issues. We previously proposed a tightly coupled asymmetrically tapered bend to suppress forward differential-to-common mode conversion and derived the constraint conditions for high-density wiring. To provide sufficient suppression of mode conversion, however, the additional correction was required to make the effective path difference vanish. This paper proposes a practical and straightforward design methodology by using a very tightly coupled bend (decreasing the line width and the line separation of the tightly coupled bend). Full-wave simulations below 20GHz demonstrated that sufficient suppression of the forward differential-to-common mode conversion is successfully achieved as designed. Measurements showed that our design methodology is effective.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2020EBP3056/_p
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@ARTICLE{e104-b_3_304,
author={Chenyu WANG, Kengo IOKIBE, Yoshitaka TOYOTA, },
journal={IEICE TRANSACTIONS on Communications},
title={Practical Design Methodology of Mode-Conversion-Free Tightly Coupled Asymmetrically Tapered Bend for High-Density Differential Wiring},
year={2021},
volume={E104-B},
number={3},
pages={304-311},
abstract={The plain bend in a pair of differential transmission lines causes a path difference, which leads to differential-to-common mode conversion due to the phase difference. This conversion can cause serious common-mode noise issues. We previously proposed a tightly coupled asymmetrically tapered bend to suppress forward differential-to-common mode conversion and derived the constraint conditions for high-density wiring. To provide sufficient suppression of mode conversion, however, the additional correction was required to make the effective path difference vanish. This paper proposes a practical and straightforward design methodology by using a very tightly coupled bend (decreasing the line width and the line separation of the tightly coupled bend). Full-wave simulations below 20GHz demonstrated that sufficient suppression of the forward differential-to-common mode conversion is successfully achieved as designed. Measurements showed that our design methodology is effective.},
keywords={},
doi={10.1587/transcom.2020EBP3056},
ISSN={1745-1345},
month={March},}
Copier
TY - JOUR
TI - Practical Design Methodology of Mode-Conversion-Free Tightly Coupled Asymmetrically Tapered Bend for High-Density Differential Wiring
T2 - IEICE TRANSACTIONS on Communications
SP - 304
EP - 311
AU - Chenyu WANG
AU - Kengo IOKIBE
AU - Yoshitaka TOYOTA
PY - 2021
DO - 10.1587/transcom.2020EBP3056
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E104-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2021
AB - The plain bend in a pair of differential transmission lines causes a path difference, which leads to differential-to-common mode conversion due to the phase difference. This conversion can cause serious common-mode noise issues. We previously proposed a tightly coupled asymmetrically tapered bend to suppress forward differential-to-common mode conversion and derived the constraint conditions for high-density wiring. To provide sufficient suppression of mode conversion, however, the additional correction was required to make the effective path difference vanish. This paper proposes a practical and straightforward design methodology by using a very tightly coupled bend (decreasing the line width and the line separation of the tightly coupled bend). Full-wave simulations below 20GHz demonstrated that sufficient suppression of the forward differential-to-common mode conversion is successfully achieved as designed. Measurements showed that our design methodology is effective.
ER -