Microwave Absorber Properties of Magnetic and Dielectric Composite Materials

• An Young Joon

  Dept. of Communications Eng. National Defense Academy

• Nishida Ken

  Dept. of Communications Eng. National Defense Academy

• Yamamoto Takashi

  Dept. of Communications Eng. National Defense Academy

• Ueda Shunkichi

  TAYCA Corporation Osaka Research Laboratory

• Deguchi Takeshi

  TAYCA Corporation Osaka Research Laboratory

Bibliographic Information

Other Title

• 磁性・誘電性複合体の電波吸収特性
• ジセイ ユウデンセイ フクゴウタイ ノ デンパ キュウシュウ トクセイ

Abstract

In recent years, because of the rapid progress in wireless technology, microwave absorbers or noise suppressors have become necessary for a safe-electromagnetic-wave-level environment. To design microwave absorbers or noise suppressors, it is necessary to have knowledge of complex permittivity, ε_r^* and permeability, μ_r^*. In this report, we show the values of complex permeability, μ_r^* and permittivity, ε_r^* for a composite materials of magnetic (Iron, Fe, coated by Fe₃O₄) and dielectric (Titanium Oxide, TiO₂), by changing Fe / TiO₂ volume fraction ratio. As changing of these, we can change the values of complex permeability (μ_r^* = μ_r' - jμ_r") and complex permittivity (ε_r^* = ε_r' - jε_r"). And the results are applied in the design of a microwave absorber which makes reflection losses and the central frequency to do a purpose, for example, necessary conditions of ETC (5.8GHz) use in Japan.

Journal

• IEEJ Transactions on Fundamentals and Materials

  IEEJ Transactions on Fundamentals and Materials 128 (6), 441-448, 2008

  The Institute of Electrical Engineers of Japan

Keywords

• microwave absorber
• complex permeability
• complex permittivity
• dielectric-magnetic composite material

Details

• CRID: 1390001204594178304
• NII Article ID: 10021130066
• NII Book ID: AN10136312
• DOI: 10.1541/ieejfms.128.441
• BIBCODE: 2008IJTFM.128..441A
• ISSN: 13475533
• ISSN: 03854205
• NDL BIB ID: 9532173
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9532173
• Web Site: http://www.jstage.jst.go.jp/article/ieejfms/128/6/128_6_441/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed