Common mode conversion noise suppression using L-Pad with asymmetric coupled lines on bended differential lines

Seungjin Lee, Jaehyuk Lim, Sangyeol Oh, Jae Hoon Lee, Yonghoon Kim, Dan Oh

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

Abstract

Right-angle bended differential lines using L-Pad with asymmetric coupled lines (ACL) are proposed to suppress the differential-to-common mode conversion. The L-pad with ACL not only suppresses the mode conversion noise effectively, but also has advantages on using in practical printed circuit board (PCB) layout because it does not occupies additional PCB areas. The simulated results show that differential-to-common mode noise conversion of proposed structure is maintained under -20 dB from DC to 4.98 GHz while conventional right-angle bended differential lines provides -20 dB suppression levels only up to 1.12 GHz. Also, Time Domain Transmission (TDT) common mode noise voltage is simulated and compared with other structures. The proposed design shows significant suppression of common mode noise with 42 mV, while other structures with compensation capacitance and with only L-pad show 118 mV and 88 mV respectively. Finally, measured results are compared with simulated results and show good agreements.

Original languageEnglish
Title of host publication2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1212-1215
Number of pages4
ISBN (Electronic)9781509059973
DOIs
Publication statusPublished - 2018 Jun 22
Event60th IEEE International Symposium on Electromagnetic Compatibility and 9th IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018 - Suntec City, Singapore
Duration: 2018 May 142018 May 18

Other

Other60th IEEE International Symposium on Electromagnetic Compatibility and 9th IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018
CountrySingapore
CitySuntec City
Period18/5/1418/5/18

Keywords

  • Bend discontinuity
  • Common mode noise
  • Differential signaling
  • Differential-to-common mode noise conversion
  • Electromagnetic compatibility
  • L-pad
  • Right-angle bended differential lines

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Radiation

Fingerprint Dive into the research topics of 'Common mode conversion noise suppression using L-Pad with asymmetric coupled lines on bended differential lines'. Together they form a unique fingerprint.

  • Cite this

    Lee, S., Lim, J., Oh, S., Lee, J. H., Kim, Y., & Oh, D. (2018). Common mode conversion noise suppression using L-Pad with asymmetric coupled lines on bended differential lines. In 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018 (pp. 1212-1215). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISEMC.2018.8393981