Analysis of optimum sheet resistance for integrated electromagnetic noise suppressors

Kaori Maruta, Masaya Sugawara, Yutaka Shimada, Masahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


This paper discusses the physical nature of the optimum sheet resistance of noise suppression sheets/films based on three-dimensional (3-D) finite-element method (FEM) electromagnetic field simulation. Co-Al-O films with sheet resistance of 10-1 — 105Ω/square were deposited on top of a micro strip-line. It was revealed that inline loss generation was maximized with the film's sheet resistance of nominally 100 Ω/square, which explains well the earlier experimental results. The ratio of loss generation to the input power reached 0.96 in the experimental results and 0.97 in the simulation results at 6 GHz. A certain balance of eddy current generation and a material resistivity allowed the Co-Al-O film to dissipate the inline noise power effectively. The simulation results also showed that the inline power was not radiated from the Co-Al-O film but was lost in the film. Ferromagnetic resonance losses were found around 1–2 GHz combined with the eddy current losses. These two electric and magnetic losses enhanced total inline loss generation effectively.

Original languageEnglish
Pages (from-to)3377-3379
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2006 Oct


  • Complex permeability
  • eddy current losses
  • electromagnetic compatibility (EMC)
  • electromagnetic noise suppressor
  • ferromagnetic resonance (FMR)
  • magnetic thin film
  • sheet resistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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