Suppression of mode conversion by installing bypass capacitor to power distribution network

Research output: Contribution to journalArticle

Abstract

In the modal-equivalent circuit derived from the view of the mode-decomposition technique, mode-conversion sources are placed at the interface where the imbalance factor of the transmission lines changes. In addition, the amount of the mode-conversion sources is proportional to not only the difference in the imbalance factor but also the magnitudes of the normal-mode voltage and the common-mode current at the same position. In this paper, therefore, the suppression of mode conversion from normal mode to common mode is experimentally examined by installing a bypass capacitor to power distribution network. The bypass capacitor helps reduce the normal-mode voltage in the vicinity of a connector on a test board where mode conversion occurs so that the common-mode current flowing a power-line cable and the electric field far from the test board are decreased. In fact, the mode conversion was most suppressed when the bypass capacitor is placed closest to the connector on the test board. Also, it was found that the mode conversion was suppressed by the capacitor installed to the power-line cable in the vicinity of the connector.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalIEEJ Transactions on Fundamentals and Materials
Volume136
Issue number1
DOIs
Publication statusPublished - Jan 1 2016

Keywords

  • Bypass capacitor
  • Common mode
  • Current division factor
  • Mode conversion
  • Normal mode
  • Power distribution network (PDN)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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