Abstract
Composite electromagnetic wave absorbers made of a soft magnetic material (permalloy or sendust) and polystyrene resin were investigated [1]. The volume mixture ratio of magnetic material was varied in the range from 18 vol% to 75 vol%. The composites with the low volume mixture ratio of soft magnetic material absorbed more than 99 % of electromagnetic wave power in the frequency range from 1 GHz to 10 GHz. The values of the real part μr' of the relative complex permeabilityμr* for both magnetic materials were less than unity at frequencies above approximately 6 GHz as the volume mixture ratio of magnetic material increased. This result suggests the possible realization of an electromagnetic wave absorber that can operate above 10 GHz.
| Original language | English |
|---|---|
| Pages (from-to) | 257-260 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 388 |
| Publication status | Published - Jan 1 2009 |
| Externally published | Yes |
Keywords
- Complex permeability
- Composite electromagnetic wave absorber
- Permalloy
- Polystyrene resin
- Sendust
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering