Electromagnetic characteristics of iron-based microwave absorbing materials

R. B. Yang, K. Y. Juan, C. Y. Tsay, W. F. Liang, C. K. Lin

Research output: Contribution to journalArticlepeer-review


Nowadays human are exposed to an environment filling with electromagnetic waves over a wide frequency range. The electromagnetic properties of microwave absorbing materials plays an important role in the performance of civilian electromagnetic interference (EMI) shielding at low frequency range and military stealth technology at high frequency one. The electromagnetic properties include complex permittivity and permeability and its combination determines the electromagnetic wave absorption ability of a material. Complex permittivity and permeability can be measured by three different methods, i.e., free-space method, coaxial/waveguide method, and resonant cavity perturbation method. The first one requires a large space, expensive equipment, and not suitable for academic usage. In the present study, using coaxial/waveguide and resonant cavity perturbation methods, electromagnetic characteristics of iron-based microwave absorbing materials will be obtained and its microwave absorption performance will be investigated. In addition, a comparison between the measurements by these two methods will be addressed.

Original languageEnglish
Pages (from-to)106-111
Number of pages6
JournalKey Engineering Materials
Publication statusPublished - 2011
Externally publishedYes
Event5th Cross-Strait Workshop on the Engineering Materials, CSWEM 5 - , Taiwan
Duration: Nov 19 2010Nov 20 2010


  • Coaxial/waveguide method
  • Complex permeability
  • Complex permittivity
  • Microwave absorbing materials
  • Resonant cavity perturbation method

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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