Electromagnetic Radiation Resulting from Two Signal Traces on a Printed Circuit Board

Yoshiki KAYANO; Motoshi TANAKA; Hiroshi INOUE

doi:10.1093/ietele/e89-c.8.1217

Electromagnetic Radiation Resulting from Two Signal Traces on a Printed Circuit Board

Yoshiki KAYANO, Motoshi TANAKA, Hiroshi INOUE

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To provide basic considerations for the realization of methods for predicting the electromagnetic (EM) radiation from a printed circuit board (PCB) with plural signal traces driven in the even-mode, the characteristics of the EM radiation resulting from two signal traces on a PCB are investigated experimentally and by numerical modeling. First, the frequency responses of common-mode (CM) current and far-electric field as electromagnetic interference (EMI) are discussed. As the two traces are moved closer to the PCB edge, CM current and far-electric field increase. The frequency responses in the two signal trace case can be identified using insights gained from the single trace case. Second, to understand the details of the increase in CM current, the distribution of the current density on the ground plane is calculated and discussed. Although crosstalk ensues, the rule for PCB design is to keep two high-speed traces on the interior of the PCB whenever possible, from the point of view of EM radiation. Finally, an empirical formula to quantify the relationship between the positions of two traces and CM current is provided and discussed by comparing four different models. Results calculated with the empirical formula and finite-difference time-domain (FDTD) modeling are in good agreement, which indicates the empirical formula may be useful for developing EMI design guidelines.

Publication: IEICE TRANSACTIONS on Electronics Vol.E89-C No.8 pp.1217-1223

Publication Date: 2006/08/01

Publicized

Online ISSN: 1745-1353

DOI: 10.1093/ietele/e89-c.8.1217

Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))

Category: Signal Transmission

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Yoshiki KAYANO, Motoshi TANAKA, Hiroshi INOUE, "Electromagnetic Radiation Resulting from Two Signal Traces on a Printed Circuit Board" in IEICE TRANSACTIONS on Electronics, vol. E89-C, no. 8, pp. 1217-1223, August 2006, doi: 10.1093/ietele/e89-c.8.1217.
Abstract: To provide basic considerations for the realization of methods for predicting the electromagnetic (EM) radiation from a printed circuit board (PCB) with plural signal traces driven in the even-mode, the characteristics of the EM radiation resulting from two signal traces on a PCB are investigated experimentally and by numerical modeling. First, the frequency responses of common-mode (CM) current and far-electric field as electromagnetic interference (EMI) are discussed. As the two traces are moved closer to the PCB edge, CM current and far-electric field increase. The frequency responses in the two signal trace case can be identified using insights gained from the single trace case. Second, to understand the details of the increase in CM current, the distribution of the current density on the ground plane is calculated and discussed. Although crosstalk ensues, the rule for PCB design is to keep two high-speed traces on the interior of the PCB whenever possible, from the point of view of EM radiation. Finally, an empirical formula to quantify the relationship between the positions of two traces and CM current is provided and discussed by comparing four different models. Results calculated with the empirical formula and finite-difference time-domain (FDTD) modeling are in good agreement, which indicates the empirical formula may be useful for developing EMI design guidelines.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e89-c.8.1217/_p

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@ARTICLE{e89-c_8_1217,
author={Yoshiki KAYANO, Motoshi TANAKA, Hiroshi INOUE, },
journal={IEICE TRANSACTIONS on Electronics},
title={Electromagnetic Radiation Resulting from Two Signal Traces on a Printed Circuit Board},
year={2006},
volume={E89-C},
number={8},
pages={1217-1223},
abstract={To provide basic considerations for the realization of methods for predicting the electromagnetic (EM) radiation from a printed circuit board (PCB) with plural signal traces driven in the even-mode, the characteristics of the EM radiation resulting from two signal traces on a PCB are investigated experimentally and by numerical modeling. First, the frequency responses of common-mode (CM) current and far-electric field as electromagnetic interference (EMI) are discussed. As the two traces are moved closer to the PCB edge, CM current and far-electric field increase. The frequency responses in the two signal trace case can be identified using insights gained from the single trace case. Second, to understand the details of the increase in CM current, the distribution of the current density on the ground plane is calculated and discussed. Although crosstalk ensues, the rule for PCB design is to keep two high-speed traces on the interior of the PCB whenever possible, from the point of view of EM radiation. Finally, an empirical formula to quantify the relationship between the positions of two traces and CM current is provided and discussed by comparing four different models. Results calculated with the empirical formula and finite-difference time-domain (FDTD) modeling are in good agreement, which indicates the empirical formula may be useful for developing EMI design guidelines.},
keywords={},
doi={10.1093/ietele/e89-c.8.1217},
ISSN={1745-1353},
month={August},}

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TY - JOUR
TI - Electromagnetic Radiation Resulting from Two Signal Traces on a Printed Circuit Board
T2 - IEICE TRANSACTIONS on Electronics
SP - 1217
EP - 1223
AU - Yoshiki KAYANO
AU - Motoshi TANAKA
AU - Hiroshi INOUE
PY - 2006
DO - 10.1093/ietele/e89-c.8.1217
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E89-C
IS - 8
JA - IEICE TRANSACTIONS on Electronics
Y1 - August 2006
AB - To provide basic considerations for the realization of methods for predicting the electromagnetic (EM) radiation from a printed circuit board (PCB) with plural signal traces driven in the even-mode, the characteristics of the EM radiation resulting from two signal traces on a PCB are investigated experimentally and by numerical modeling. First, the frequency responses of common-mode (CM) current and far-electric field as electromagnetic interference (EMI) are discussed. As the two traces are moved closer to the PCB edge, CM current and far-electric field increase. The frequency responses in the two signal trace case can be identified using insights gained from the single trace case. Second, to understand the details of the increase in CM current, the distribution of the current density on the ground plane is calculated and discussed. Although crosstalk ensues, the rule for PCB design is to keep two high-speed traces on the interior of the PCB whenever possible, from the point of view of EM radiation. Finally, an empirical formula to quantify the relationship between the positions of two traces and CM current is provided and discussed by comparing four different models. Results calculated with the empirical formula and finite-difference time-domain (FDTD) modeling are in good agreement, which indicates the empirical formula may be useful for developing EMI design guidelines.
ER -