Estimation of Spatial Distribution of Wideband Electromagnetic Noise Around a Printed Circuit Board

Takashi Kasuga, Motoshi Tanaka, Hiroshi Inoue

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    In this study, the frequency and spatial properties of undesired electromagnetic radiation distribution around a simple printed circuit board (PCB) model, which only has the mismatching printed line (PL) and ground, are estimated. Finite difference time domain (FDTD) modeling is developed for the analysis space, which is 500 × 400 × 51mm3 in size, around the PCB. As the driving clock pulse has a very wide frequency bandwidth, ranging from kHz to GHz, basic and precise investigation of the noise emission mechanism from the basic model is performed. The results of the magnetic field Hx on the PCB as determined by FDTD simulation, and those of the experiment, driven by a clock pulse, agree well. The results show that although this approach is basic and simple, it becomes clear that the frequency and spatial characteristics of the electric and magnetic field near the PCB are influenced by the wavelength of the frequency and appling the driving clock pulse, and the low-frequency component of the electromagnetic distribution around the PCB is larger than the high-frequency components. It is suggested that the low-frequency noise problem should be carefully considered.

    Original languageEnglish
    Pages (from-to)2154-2161
    Number of pages8
    JournalIEICE Transactions on Communications
    Issue number7
    Publication statusPublished - 2003 Jul


    • FDTD method
    • Standing wave
    • Wide band electromagnetic noise distribution

    ASJC Scopus subject areas

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


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