Thin-film RF noise suppressor integrated onto a transmission line

Masahiro Yamaguchi, Takashi Kuribara, Ken Ichi Arai

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We discuss the possibility of the integrated countermeasure of radio-frequency (RF) electromagnetic (EM) noise emission on a RF integrated transmission line by using the loss generation of ferromagnetic thin-films. The targeting frequency range is 1-10 GHz, where most of the bulk and the composite ferrite materials have only a small loss generation. A 3μm thick rf-sputter deposited Cu film was used form a thin coplanar transmission line on a soda glass substrate with a characteristic impedance of 50Ω. The co-planar line is most common in RF integrated circuits. An integrated magnetic thin-film countermeasure element was put on the transmission line with a 7μm thick polyimide layer in between. The magnetic film suppresses the high frequency noise by means of ferromagnetic resonance (FMR) losses. The 0.1μm thick Co85Nb12Zr7 amorphous film was applied in narrow slit trains along the easy axis of magnetization in order to shift the FMR frequency toward the higher frequency range. The transmission characteristics were evaluated by the S21 parameter.

Original languageEnglish
Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)0780373650, 9780780373655
Publication statusPublished - 2002
Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
Duration: 2002 Apr 282002 May 2


Other2002 IEEE International Magnetics Conference, INTERMAG Europe 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Surfaces, Coatings and Films


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