A non-integrated type noise suppressor incorporated with a highly resistive Co-Fe-Al-O thin film on a coplanar waveguide transmission line

Jaecheon Sohn, S. H. Han, Ki Hyeon Kim, Masahiro Yamaguchi, Sang Ho Lim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A non-integrated type noise suppressor on a coplanar waveguide (CPW) transmission line is demonstrated by using a highly resistive Co41Fe38Al13O8 (in atomic %) nanogranular thin film with the dimensions of 4 mm (l)×4 mm (w)×0.1 μm (t). Due to high resistivity of the magnetic thin film, no insulating layer is disposed between the CPW line and the film. The insertion loss is very low being less than 0.3 dB and this low value is maintained up to 2 GHz. At a ferromagnetic resonance frequency of 3.3 GHz where a large power loss is observed, the degree of noise attenuation is increased significantly reaching 2 dB. This level of noise attenuation is still small for real applications, but, considering a small magnetic volume used in this work, further improvement is expected by simply increasing the magnetic volume and also integrating the magnetic thin film into the CPW transmission line.

Original languageEnglish
Pages (from-to)708-713
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume311
Issue number2
DOIs
Publication statusPublished - 2007 Apr 1

Fingerprint

Coplanar waveguides
noise reduction
transmission lines
Magnetic thin films
Electric lines
waveguides
Thin films
thin films
Ferromagnetic resonance
Telephone lines
power loss
ferromagnetic resonance
Insertion losses
insertion loss
electrical resistivity

Keywords

  • Coplanar waveguide transmission line
  • Electromagnetic noise suppressor
  • Ferromagnetic resonance
  • Magnetic thin film

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

A non-integrated type noise suppressor incorporated with a highly resistive Co-Fe-Al-O thin film on a coplanar waveguide transmission line. / Sohn, Jaecheon; Han, S. H.; Kim, Ki Hyeon; Yamaguchi, Masahiro; Lim, Sang Ho.

In: Journal of Magnetism and Magnetic Materials, Vol. 311, No. 2, 01.04.2007, p. 708-713.

Research output: Contribution to journalArticle

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AU - Yamaguchi, Masahiro

AU - Lim, Sang Ho

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AB - A non-integrated type noise suppressor on a coplanar waveguide (CPW) transmission line is demonstrated by using a highly resistive Co41Fe38Al13O8 (in atomic %) nanogranular thin film with the dimensions of 4 mm (l)×4 mm (w)×0.1 μm (t). Due to high resistivity of the magnetic thin film, no insulating layer is disposed between the CPW line and the film. The insertion loss is very low being less than 0.3 dB and this low value is maintained up to 2 GHz. At a ferromagnetic resonance frequency of 3.3 GHz where a large power loss is observed, the degree of noise attenuation is increased significantly reaching 2 dB. This level of noise attenuation is still small for real applications, but, considering a small magnetic volume used in this work, further improvement is expected by simply increasing the magnetic volume and also integrating the magnetic thin film into the CPW transmission line.

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