High-speed common-mode prediction method for PCBs having a signal line close to the ground edge

Tetsushi Watanabe; Akihiro Namba; Hiroshi Fujihara; Yoshitaka Toyota; Osami Wada; Ryugi Koga

High-speed common-mode prediction method for PCBs having a signal line close to the ground edge

Tetsushi Watanabe, Akihiro Namba, Hiroshi Fujihara, Yoshitaka Toyota, Osami Wada, Ryugi Koga

Research output: Contribution to journal › Conference article › peer-review

Abstract

Evaluation of common-mode excitation is important to efficiently reduce the EMI radiated from printed circuit boards (PCBs). We have focused on the excitation mechanisms of the common-mode current flowing on a PCB. In a previous paper, we explained a mechanism of common-mode excitation in terms of the current division factor, which expresses the degree of imbalance of a transmission line. The calculation is two-dimensional so the evaluation time is much shorter than that of FDTD or other 3D full-wave simulations. The calculated reduction of common-mode radiation from simple PCBs agreed well with the measured value. In this paper, to demonstrate the effectiveness of this approach, we apply it to various PCBs, such as one that has a signal trace close to a board edge or one with guard bands, and evaluate the effectiveness of the common-mode reduction. Our calculated and experimental results are in good agreement.

Original language	English
Pages (from-to)	28-33
Number of pages	6
Journal	IEEE International Symposium on Electromagnetic Compatibility
Volume	1
Publication status	Published - Oct 20 2003
Event	2003 IEEE Symposium on Electromagnetic Compatibility - Boston, MA, United States Duration: Aug 18 2003 → Aug 22 2003

Keywords

2-D
Common mode
Current division factor
Edge
EMI
Ground
Guard band
PCB

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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High-speed common-mode prediction method for PCBs having a signal line close to the ground edge. / Watanabe, Tetsushi; Namba, Akihiro; Fujihara, Hiroshi; Toyota, Yoshitaka; Wada, Osami; Koga, Ryugi.

In: IEEE International Symposium on Electromagnetic Compatibility, Vol. 1, 20.10.2003, p. 28-33.

Research output: Contribution to journal › Conference article › peer-review

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abstract = "Evaluation of common-mode excitation is important to efficiently reduce the EMI radiated from printed circuit boards (PCBs). We have focused on the excitation mechanisms of the common-mode current flowing on a PCB. In a previous paper, we explained a mechanism of common-mode excitation in terms of the current division factor, which expresses the degree of imbalance of a transmission line. The calculation is two-dimensional so the evaluation time is much shorter than that of FDTD or other 3D full-wave simulations. The calculated reduction of common-mode radiation from simple PCBs agreed well with the measured value. In this paper, to demonstrate the effectiveness of this approach, we apply it to various PCBs, such as one that has a signal trace close to a board edge or one with guard bands, and evaluate the effectiveness of the common-mode reduction. Our calculated and experimental results are in good agreement.",

keywords = "2-D, Common mode, Current division factor, Edge, EMI, Ground, Guard band, PCB",

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AU - Watanabe, Tetsushi

AU - Namba, Akihiro

AU - Fujihara, Hiroshi

AU - Toyota, Yoshitaka

AU - Wada, Osami

AU - Koga, Ryugi

PY - 2003/10/20

Y1 - 2003/10/20

N2 - Evaluation of common-mode excitation is important to efficiently reduce the EMI radiated from printed circuit boards (PCBs). We have focused on the excitation mechanisms of the common-mode current flowing on a PCB. In a previous paper, we explained a mechanism of common-mode excitation in terms of the current division factor, which expresses the degree of imbalance of a transmission line. The calculation is two-dimensional so the evaluation time is much shorter than that of FDTD or other 3D full-wave simulations. The calculated reduction of common-mode radiation from simple PCBs agreed well with the measured value. In this paper, to demonstrate the effectiveness of this approach, we apply it to various PCBs, such as one that has a signal trace close to a board edge or one with guard bands, and evaluate the effectiveness of the common-mode reduction. Our calculated and experimental results are in good agreement.

AB - Evaluation of common-mode excitation is important to efficiently reduce the EMI radiated from printed circuit boards (PCBs). We have focused on the excitation mechanisms of the common-mode current flowing on a PCB. In a previous paper, we explained a mechanism of common-mode excitation in terms of the current division factor, which expresses the degree of imbalance of a transmission line. The calculation is two-dimensional so the evaluation time is much shorter than that of FDTD or other 3D full-wave simulations. The calculated reduction of common-mode radiation from simple PCBs agreed well with the measured value. In this paper, to demonstrate the effectiveness of this approach, we apply it to various PCBs, such as one that has a signal trace close to a board edge or one with guard bands, and evaluate the effectiveness of the common-mode reduction. Our calculated and experimental results are in good agreement.

KW - 2-D

KW - Common mode

KW - Current division factor

KW - Edge

KW - EMI

KW - Ground

KW - Guard band

KW - PCB

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JO - IEEE International Symposium on Electromagnetic Compatibility

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T2 - 2003 IEEE Symposium on Electromagnetic Compatibility

Y2 - 18 August 2003 through 22 August 2003

ER -

High-speed common-mode prediction method for PCBs having a signal line close to the ground edge

Abstract

Keywords

ASJC Scopus subject areas

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