Common-Mode-Current Generation Caused by Difference of Unbalance of Transmission Lines on a Printed Circuit Board with Narrow Ground Pattern
Summary :
This paper explains a mechanism of common-mode generation on a printed circuit board with a narrow ground pattern. A transmission line has its value of degree of unbalance. At a connection point of two transmission lines having different degrees of unbalance, common mode voltage is generated proportional to the difference, and it drives common mode current. The authors propose a method to evaluate common mode current distribution and verify it by measurement. Although calculated common mode current is larger than measured one by a few dBs, both of them are proportional to the degree of unbalance. An EMI reduction technique, 'unbalance matching,' is also proposed.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E83-B No.3 pp.593-599
- Publication Date
- 2000/03/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Recent Progress in Electromagnetic Compatibility Technology)
- Category
- EMC Design of PCB
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Tetsushi WATANABE, Osami WADA, Takuya MIYASHITA, Ryuji KOGA, "Common-Mode-Current Generation Caused by Difference of Unbalance of Transmission Lines on a Printed Circuit Board with Narrow Ground Pattern" in IEICE TRANSACTIONS on Communications,
vol. E83-B, no. 3, pp. 593-599, March 2000, doi: .
Abstract: This paper explains a mechanism of common-mode generation on a printed circuit board with a narrow ground pattern. A transmission line has its value of degree of unbalance. At a connection point of two transmission lines having different degrees of unbalance, common mode voltage is generated proportional to the difference, and it drives common mode current. The authors propose a method to evaluate common mode current distribution and verify it by measurement. Although calculated common mode current is larger than measured one by a few dBs, both of them are proportional to the degree of unbalance. An EMI reduction technique, 'unbalance matching,' is also proposed.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e83-b_3_593/_p
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@ARTICLE{e83-b_3_593,
author={Tetsushi WATANABE, Osami WADA, Takuya MIYASHITA, Ryuji KOGA, },
journal={IEICE TRANSACTIONS on Communications},
title={Common-Mode-Current Generation Caused by Difference of Unbalance of Transmission Lines on a Printed Circuit Board with Narrow Ground Pattern},
year={2000},
volume={E83-B},
number={3},
pages={593-599},
abstract={This paper explains a mechanism of common-mode generation on a printed circuit board with a narrow ground pattern. A transmission line has its value of degree of unbalance. At a connection point of two transmission lines having different degrees of unbalance, common mode voltage is generated proportional to the difference, and it drives common mode current. The authors propose a method to evaluate common mode current distribution and verify it by measurement. Although calculated common mode current is larger than measured one by a few dBs, both of them are proportional to the degree of unbalance. An EMI reduction technique, 'unbalance matching,' is also proposed.},
keywords={},
doi={},
ISSN={},
month={March},}
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TY - JOUR
TI - Common-Mode-Current Generation Caused by Difference of Unbalance of Transmission Lines on a Printed Circuit Board with Narrow Ground Pattern
T2 - IEICE TRANSACTIONS on Communications
SP - 593
EP - 599
AU - Tetsushi WATANABE
AU - Osami WADA
AU - Takuya MIYASHITA
AU - Ryuji KOGA
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E83-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2000
AB - This paper explains a mechanism of common-mode generation on a printed circuit board with a narrow ground pattern. A transmission line has its value of degree of unbalance. At a connection point of two transmission lines having different degrees of unbalance, common mode voltage is generated proportional to the difference, and it drives common mode current. The authors propose a method to evaluate common mode current distribution and verify it by measurement. Although calculated common mode current is larger than measured one by a few dBs, both of them are proportional to the degree of unbalance. An EMI reduction technique, 'unbalance matching,' is also proposed.
ER -
English
