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, Sang Ho Lim

Research output: Contribution to journalArticle

1 Citation (Scopus)


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
Issue number2 SUPPL. PART 3
Publication statusPublished - 2007 Mar 1



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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this