Effect of sendust particle size on absorption characteristics of composite electromagnetic wave absorber

Kenji Sakai, Yoichi Wada, Yuuki Sato, Shinzo Yoshikado

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

2 Citations (Scopus)

Abstract

The effects of the particle size of sendust, which is an alloy of Al 5%, Si 10%, and Fe 85%, on the absorption characteristics of composite electromagnetic wave absorbers made of polystyrene resin and sendust were investigated in the frequency range from 1 to 40 GHz. The size of sendust particles was varied between approximately 5 and 20 μm. A metal-backed single-layer absorber made of 20 μm sendust particles absorbed more than 99% of electromagnetic wave power at frequencies above 20 GHz. Meanwhile, a composite made of 5 μm particles exhibited a return loss of less than -20 dB in the frequency range of not only several GHz but also above 30 GHz. In addition, the relative complex permeability μr * was shown to be controlled by adjusting the particle size of sendust, and an electromagnetic wave absorber with a flexible design was proposed.

Original languageEnglish
Title of host publicationAsian Ceramic Science for Electronics III and Electroceramics in Japan XII
PublisherTrans Tech Publications Ltd
Pages451-454
Number of pages4
ISBN (Print)0878493069, 9780878493067
DOIs
Publication statusPublished - Jan 1 2010
Externally publishedYes
Event6th Asian Meeting on Electroceramics, AMEC-6, in conjunction with the Electronics Division Meeting of the Ceramic Society of Japan - Tsukuba, Japan
Duration: Oct 22 2008Oct 24 2008

Publication series

NameKey Engineering Materials
Volume421-422
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other6th Asian Meeting on Electroceramics, AMEC-6, in conjunction with the Electronics Division Meeting of the Ceramic Society of Japan
CountryJapan
CityTsukuba
Period10/22/0810/24/08

Keywords

  • Composite electromagnetic wave absorber
  • Eddy current
  • Relative complex permeability
  • Sendust

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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