Power and Signal Integrity and Electromagnetic Emission; the balancing act of decoupling, planes and tracks

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    Abstract

    The noise voltage in the reference or ground of a printed circuit board is often the cause of unwanted radiated emission. Power supply planes attribute to the noise voltage. By replacing the power supply planes by tracks, the noise voltage in the reference or ground can be considerably reduced, which leads to a dramatic reduction of the radiated electromagnetic fields. This has been shown using transmission line equations for a general two-conductor line. Simulation and measurements results confirm the beneficial effect of removing power planes. A reduction of 50 dB in radiated electromagnetic field strength was obtained. The question was raised whether (or not) the signal integrity is negatively influenced by using power tracks instead of planes. Several printed circuit boards have been built and measured, showing that signal integrity remains while reduction of radiated emission is achieved.
    Original languageUndefined
    Title of host publicationIEEE International Symposium on Electromagnetic Compatibility, 2007. EMC 2007.
    Place of PublicationLos Alamitos
    PublisherIEEE Computer Society Press
    Pages1-5
    Number of pages5
    ISBN (Print)1-4244-1350-8
    DOIs
    Publication statusPublished - 9 Jul 2007
    Event2007 IEEE International Symposium on Electromagnetic Compatibility, EMC 2007 - Hawaii Convention Center, Honolulu, United States
    Duration: 9 Jul 200713 Jul 2007

    Publication series

    Name
    PublisherIEEE Computer Society Press
    Number67310A

    Workshop

    Workshop2007 IEEE International Symposium on Electromagnetic Compatibility, EMC 2007
    Abbreviated titleEMC
    CountryUnited States
    CityHonolulu
    Period9/07/0713/07/07

    Keywords

    • EWI-11616
    • IR-64548
    • METIS-245882

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