Estimation of spatial distribution of electromagnetic noise radiated from PCB

Takashi Kasuga, Motoshi Tanaka, Takashi Komakine, Hiroshi Inoue

    Research output: Contribution to journalConference articlepeer-review

    4 Citations (Scopus)


    This study is to clear the frequency characteristics of spatial distribution of electromagnetic noise inside of 3 m around Printed Circuit Board (PCB) by simulation and experiment. It is also discussed that Finite Difference Time Domain Method (FDTD Method) is the useful tool to estimate the frequency characteristic of spatial distribution for electric and magnetic field around PCB. By comparison between electric and magnetic near field spectrum above the printed line by simulation, these spectrums have differences in the resonance frequency. When the characteristics of the electric and magnetic field strength at 60 ns after the excitation is calculated, the electric field is decreased, the magnetic field is not decreased, as the distance from PCB is farther. From characteristics of particular frequencies, the electric field spectrum at 3 MHz, i.e. clock pulse, is decreased, whereas magnetic field is not decreased. The electric and magnetic field strength at resonance frequency, 417 MHz, is decreased in inverse proportional to the square of the distance. It is also cleared that the low frequency magnetic field strength may be superior to higher frequency.

    Original languageEnglish
    Pages (from-to)369-374
    Number of pages6
    JournalIEEE International Symposium on Electromagnetic Compatibility
    Publication statusPublished - 2000 Jan 1
    Event2000 IEEE International Symposium on Electromagneti Compatibility - Washington, DC, USA
    Duration: 2000 Aug 212000 Aug 25

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electrical and Electronic Engineering


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