Effect of conductive sheet placed over PCB on electromagnetic noise shielding

Motoshi Tanaka, Hisashi Takita, Hiroshi Inoue

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    The effect of a conductive sheet placed over a PCB with a microstrip line on electromagnetic noise shielding is investigated. As a typical conductive sheet, a copper sheet is used, and is not grounded. First, the input impedance of the microstrip line and the magnetic field when varying the distance between the PCB and the conductive sheet are measured, and the distance that does not affect the signal transmission is set at 8 mm. Second, the effect of the conductive sheet size on the magnetic field radiation is discussed by measurements and FDTD modeling, and the magnetic near-field distribution around the PCB is visualized by using the FDTD calculation. A conductive sheet whose width is larger than the PCB width should be effective for suppression of the magnetic near-field noise radiation just above a PCB.

    Original languageEnglish
    Pages (from-to)1125-1131
    Number of pages7
    JournalIEICE Transactions on Communications
    VolumeE86-B
    Issue number3
    Publication statusPublished - 2003 Mar

    Keywords

    • Conductive sheet
    • Electromagnetic noise
    • FDTD method
    • PCB
    • Shielding

    ASJC Scopus subject areas

    • Software
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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