RF and microwave noise suppression in a transmission line using Fe-Si-Al/Ni-Zn magnetic composite films

J. W. Lee, Y. K. Hong, K. Kim, J. Joo, Y. W. Yoon, S. W. Kim, Y. B. Kim, K. Y. Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Radio-frequency (RF) and microwave noise suppression by using magnetic composite films on a microstrip line (MSL) was studied in the frequency range from 50 MHz to 13.5 GHz. The MSL was composed of a Cu transmission line, dielectric materials, and a Cu substrate. The Fe-Si-Al/Ni-Zn magnetic composite films were placed on the MSL, and the reflection and the transmission characteristics were investigated. We observed that RF and microwave noise suppression caused by the Fe-Si-Al/Ni-Zn magnetic composite films varied with the concentration ratio of the sendust (Fe-Si-Al) and the Ni-Zn ferrite. The frequency dependence of the power loss due to the composite films on the MSL was measured and the power loss increased at higher frequencies with increasing concentration of the sendust in the composites. The electromagnetic interference shielding efficiencies of the magnetic composite films in the far-field region are also discussed.

Original languageEnglish
Pages (from-to)1534-1538
Number of pages5
JournalJournal of the Korean Physical Society
Volume48
Issue number6
Publication statusPublished - 2006 Jun

Keywords

  • EMI shielding efficiency
  • Magnetic composite films
  • Microstrip line
  • Noise suppression
  • Power loss

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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