Modeling for RF Noise Suppressor Using a Magnetic Film on Coplanar Transmission Line

Ki Hyeon Kim, Masahiro Yamaguchi, Shinji Ikeda, Ken Ichi Arai

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26 Citations (Scopus)


A finite-element method is applied to analyze the electromagnetic field and loss generation of a soft magnetic thin film on coplanar transmission line for which the dimension of the magnetic film is designed to control the center frequency and bandwidth of the radio-frequency (RF) electromagnetic noise attenuation at gigahertz range without external applied magnetic fields. The coplanar transmission line with characteristic impedance of 50 Ω has total width, width of signal line, and thickness of 400, 50, and 3 μm, respectively. The change of the magnetic field distribution, the induced surface current density on the coplanar transmission line, and hence the RF noise suppression by soft magnetic films are significant as a function of the width (50-2000 μm) and thickness (0.1, 0.3, 0.5, and 1 μm) of the magnetic film.

Original languageEnglish
Pages (from-to)3031-3033
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5 II
Publication statusPublished - 2003 Sept


  • Coplanar transmission line
  • Ferromagnetic resonance
  • Finite-element method
  • RF noise suppression


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