Radiated emission from a PCB with an attached cable resulting from a nonzero ground plane impedance

Yoshiki Kayano, Motoshi Tanaka, Hiroshi Inoue

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

    5 Citations (Scopus)

    Abstract

    In this paper, radiated emission from a PCB with an attached cable resulting from a nonzero ground plane impedance is studied experimentally and with FDTD modeling. Frequency responses of the CM current, the electric field near the PCB, and the electric far field are investigated. First, the effect of a thin wire to mimic an interconnected ground wire is discussed. Comparing the cases with and without the thin wire, the difference is only at the resonance frequency, and there is no change on the magnitude of the CM current. Second, the effect of a termination on EMI coupling-path that results from the nonzero ground plane impedance is discussed. When the terminating resistor is smaller than the nonzero impedance, EMI antenna is driven as currentdriven. Therefore, for relatively low impedance load such as 51 Ω, EMI antenna is driven as voltage-driven at lower frequency. As the terminating resistor is larger, the CM current becomes larger at lower frequencies (10∼100 MHz). This indicates that a high impedance load such as a logic IC results in larger radiation at lower frequency.

    Original languageEnglish
    Title of host publication2005 International Symposium on Electromagnetic Compatibility, EMC 2005
    Pages955-960
    Number of pages6
    DOIs
    Publication statusPublished - 2005 Dec 1
    Event2005 International Symposium on Electromagnetic Compatibility, EMC 2005 - Chicago, IL, United States
    Duration: 2005 Aug 82005 Aug 12

    Publication series

    NameIEEE International Symposium on Electromagnetic Compatibility
    Volume3
    ISSN (Print)1077-4076

    Conference

    Conference2005 International Symposium on Electromagnetic Compatibility, EMC 2005
    Country/TerritoryUnited States
    CityChicago, IL
    Period05/8/805/8/12

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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