Suppression of Mode Conversion Due to Asymmetric Geometry of Dense Parallel Traces in Differential-Transmission Lines

Tomoya Takeuchi, Kengo Iokibe, Yoshitaka Toyota

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Symmetry is important for differential-transmission lines, but the dense parallel traces easily break the symmetry due to coupling with the adjacent conductor, leading to mode conversion. We propose an asymmetric geometry of differential-transmission lines placed on the side of a nonadjacent conductor to suppress mode conversion and maintain signal integrity in the cases of loosely coupled and tightly coupled parallel traces. By designing the asymmetric geometry of dense differential-transmission lines by taking into account coupling with the adjacent conductor, mode conversion was successfully suppressed by decreasing the line width on the side of the non-adjacent conductor. It was also found that the asymmetric geometry can suppress mode conversion and maintain signal integrity in tightly coupled parallel traces. In loosely coupled parallel traces, on the other hand, the tightly coupled asymmetrically tapered bend we previously proposed suppresses mode conversion.

Original languageEnglish
Title of host publicationProceedings of the 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728155791
DOIs
Publication statusPublished - Sep 23 2020
Event2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020 - Virtual, Rome, Italy
Duration: Sep 23 2020Sep 25 2020

Publication series

NameProceedings of the 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020

Conference

Conference2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, EMC EUROPE 2020
CountryItaly
CityVirtual, Rome
Period9/23/209/25/20

Keywords

  • asymmetric geometry
  • dense parallel traces
  • differential-transmission lines
  • mixed-mode S parameters
  • mode conversion

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Radiation
  • Computer Networks and Communications
  • Hardware and Architecture
  • Aerospace Engineering

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