Summary
International Symposium on Electromagnetic Compatibility
2009
Session Number:24P1
Session:
Number:24P1-1
Possibilities for the EM Absorber and Shielding by Use of Metamaterials
T. Tsutaoka, K. Hatakeyama, T. Kasagi,
pp.725-728
Publication Date:2009/7/20
Online ISSN:2188-5079
Summary:
Possibilities for the construction of EM absorbers and EM shielding by use of the metamaterials or artificial materials have been investigated. For the EM absorber, the input impedance matching can be achieved by use of its inverse frequency dependence in the double negative (DNG) media. An EM absorber which has a negative permittivity (ENG) layer and a frequency selective shielding by use of the resonant characteristics of the artificial negative permittivity material have been developed by using a metallic fiber array (MFA) composite. In the EM absorber having ENG layer, the matching condition was achieved over a relatively wide-band compared to the conventional single ferrite-rubber layer absorber. In the layerd MFA composite structure, the stop band range can be controlled by combining the dielectric resonance characteristics of each MFA layers.