Effects of the magnetic layer length on the high-frequency characteristics of an integrated-type coplanar wave-guide transmission line

  • Jaecheon Sohn
  • , S. H. Han*
  • , M. Yamaguchi
  • , S. H. Lim
  • *Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    Integrated-type electromagnetic noise suppressors, based on a coplanar wave-guide transmission line, are investigated, incorporated with a SiO2 dielectric and a nanogranular Co-Fe-Al-O magnetic thin film. The length of the magnetic thin film is varied from 2 to 15 mm, while its thickness and width are fixed at 1 and 50 μm, respectively. In the measurement frequency range of 0.1-20 GHz, no obvious resonance is seen at the shortest length of the magnetic thin film, but resonance behavior occurs at larger length. A very clear resonance occurs at the largest length of 15 mm, where the resonance frequency is ∼10 GHz and the signal attenuation is as large as -20 dB. The observed resonance frequency is much higher than the ferromagnetic resonance frequency and the main mechanism of loss generation is found to be L-C resonance.

    Original languageEnglish
    Pages (from-to)2563-2565
    Number of pages3
    JournalJournal of Magnetism and Magnetic Materials
    Volume310
    Issue number2 SUPPL. PART 3
    DOIs
    Publication statusPublished - 2007 Mar

    Bibliographical note

    Funding Information:
    This work was supported by the Korean Ministry of Science and Technology through the National Research Laboratory program and the Korea–Italy program.

    Keywords

    • Coplanar waveguide transmission line
    • Electromagnetic noise suppressor
    • Integrated device
    • Magnetic thin film

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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