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

Seungjin Lee, Jaehyuk Lim, Sangyeol Oh, Jaehoon 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

    Publication series

    Name2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility, EMC/APEMC 2018

    Other

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

    Bibliographical note

    Funding Information:
    This work was supported by the institute of civil military technology cooperation under the Agency for defense development (18DB1400) and Samsung Electronics, Inc.

    Funding Information:
    ACKNOWLEDGMENT This work was supported by the institute of civil military technology cooperation under the Agency for defense development (18DB1400) and Samsung Electronics, Inc.

    Publisher Copyright:
    © 2018 IEEE.

    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

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