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
Placer une trace de garde à côté d'une ligne de signal est la technique conventionnelle pour réduire le rayonnement de mode commun d'une carte de circuit imprimé. Dans cet article, la suppression du rayonnement de mode commun provenant de cartes de circuits imprimés comportant des traces de garde est estimée et évaluée à l'aide du modèle de différence de déséquilibre proposé par les auteurs. Pour réduire davantage le rayonnement de mode commun, une procédure de conception d'une ligne de transmission avec des traces de garde est proposée. Des traces de garde connectées à un plan de retour via des vias sont placées à proximité d'une ligne de signal et diminuent un facteur de division de courant (CDF). Le CDF représente le degré de déséquilibre d'une ligne de transmission, et une force électromotrice de mode commun dépend du CDF. Ainsi, en calculant le CDF, on peut estimer la réduction du rayonnement de mode commun. Elle est réduite non seulement en plaçant des traces de garde, mais également en rétrécissant la ligne de signal pour compenser la variation d'impédance caractéristique due aux traces de garde. Les résultats expérimentaux ont montré que la réduction maximale du rayonnement de mode commun était d'environ 14 dB, obtenue en plaçant des traces de garde des deux côtés de la ligne de signal, et que la réduction calculée concordait avec celle mesurée à 1 dB près. Selon le CDF et les calculs d'impédance caractéristique, le rayonnement de mode commun peut être réduit d'environ 25 dB tout en maintenant l'impédance caractéristique constante en modifiant l'écart entre la ligne de signal et la trace de garde et en réduisant la largeur de la ligne de signal.
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Tohlu MATSUSHIMA, Tetsushi WATANABE, Yoshitaka TOYOTA, Ryuji KOGA, Osami WADA, "Evaluation of EMI Reduction Effect of Guard Traces Based on Imbalance Difference Model" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 6, pp. 2193-2200, June 2009, doi: 10.1587/transcom.E92.B.2193.
Abstract: Placing a guard trace next to a signal line is the conventional technique for reducing the common-mode radiation from a printed circuit board. In this paper, the suppression of common-mode radiation from printed circuit boards having guard traces is estimated and evaluated using the imbalance difference model, which was proposed by the authors. To reduce common-mode radiation further, a procedure for designing a transmission line with guard traces is proposed. Guard traces connected to a return plane through vias are placed near a signal line and they decrease a current division factor (CDF). The CDF represents the degree of imbalance of a transmission line, and a common-mode electromotive force depends on the CDF. Thus, by calculating the CDF, we can estimate the reduction in common-mode radiation. It is reduced not only by placing guard traces, but also by narrowing the signal line to compensate for the variation in characteristic impedance due to the guard traces. Experimental results showed that the maximum reduction in common-mode radiation was about 14 dB achieved by placing guard traces on both sides of the signal line, and the calculated reduction agreed with the measured one within 1 dB. According to the CDF and characteristic impedance calculations, common-mode radiation can be reduced by about 25 dB while keeping the characteristic impedance constant by changing the gap between the signal line and the guard trace and by narrowing the width of the signal line.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.2193/_p
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@ARTICLE{e92-b_6_2193,
author={Tohlu MATSUSHIMA, Tetsushi WATANABE, Yoshitaka TOYOTA, Ryuji KOGA, Osami WADA, },
journal={IEICE TRANSACTIONS on Communications},
title={Evaluation of EMI Reduction Effect of Guard Traces Based on Imbalance Difference Model},
year={2009},
volume={E92-B},
number={6},
pages={2193-2200},
abstract={Placing a guard trace next to a signal line is the conventional technique for reducing the common-mode radiation from a printed circuit board. In this paper, the suppression of common-mode radiation from printed circuit boards having guard traces is estimated and evaluated using the imbalance difference model, which was proposed by the authors. To reduce common-mode radiation further, a procedure for designing a transmission line with guard traces is proposed. Guard traces connected to a return plane through vias are placed near a signal line and they decrease a current division factor (CDF). The CDF represents the degree of imbalance of a transmission line, and a common-mode electromotive force depends on the CDF. Thus, by calculating the CDF, we can estimate the reduction in common-mode radiation. It is reduced not only by placing guard traces, but also by narrowing the signal line to compensate for the variation in characteristic impedance due to the guard traces. Experimental results showed that the maximum reduction in common-mode radiation was about 14 dB achieved by placing guard traces on both sides of the signal line, and the calculated reduction agreed with the measured one within 1 dB. According to the CDF and characteristic impedance calculations, common-mode radiation can be reduced by about 25 dB while keeping the characteristic impedance constant by changing the gap between the signal line and the guard trace and by narrowing the width of the signal line.},
keywords={},
doi={10.1587/transcom.E92.B.2193},
ISSN={1745-1345},
month={June},}
Copier
TY - JOUR
TI - Evaluation of EMI Reduction Effect of Guard Traces Based on Imbalance Difference Model
T2 - IEICE TRANSACTIONS on Communications
SP - 2193
EP - 2200
AU - Tohlu MATSUSHIMA
AU - Tetsushi WATANABE
AU - Yoshitaka TOYOTA
AU - Ryuji KOGA
AU - Osami WADA
PY - 2009
DO - 10.1587/transcom.E92.B.2193
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2009
AB - Placing a guard trace next to a signal line is the conventional technique for reducing the common-mode radiation from a printed circuit board. In this paper, the suppression of common-mode radiation from printed circuit boards having guard traces is estimated and evaluated using the imbalance difference model, which was proposed by the authors. To reduce common-mode radiation further, a procedure for designing a transmission line with guard traces is proposed. Guard traces connected to a return plane through vias are placed near a signal line and they decrease a current division factor (CDF). The CDF represents the degree of imbalance of a transmission line, and a common-mode electromotive force depends on the CDF. Thus, by calculating the CDF, we can estimate the reduction in common-mode radiation. It is reduced not only by placing guard traces, but also by narrowing the signal line to compensate for the variation in characteristic impedance due to the guard traces. Experimental results showed that the maximum reduction in common-mode radiation was about 14 dB achieved by placing guard traces on both sides of the signal line, and the calculated reduction agreed with the measured one within 1 dB. According to the CDF and characteristic impedance calculations, common-mode radiation can be reduced by about 25 dB while keeping the characteristic impedance constant by changing the gap between the signal line and the guard trace and by narrowing the width of the signal line.
ER -