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Journal of Navigation and Port Research 2011;35(9):717-720.
Published online December 31, 2011.
Development of EM Wave Absorber for Hi-pass System Using Amorphous Metal Powder
Dong Il Kim, Gun Suk Yoo, Dong Soo Choi
Abstract
In this paper, we designed and fabricated the Electromagnetic(EM) wave absorber for an Electronic Toll Collection(ETC or Hi-pass) system by using Amorphous metal powder and CPE. The material properties and the absorption properties of the samples containing 50 wt.%, 60 wt.%, 70 wt.%, and 80 wt.% of Amorphous. Moreover, the EM wave absorption abilities were simulated for the different thicknesses of the EM absorbers by adopting the measured permittivity and permeability, and then the EM wave absorber was fabricated based on the simulated design values. As a result, the EM wave absorber with the composition of Amorphous metal powder : CPE = 50 : 50 wt.% with the thickness of 2.6 ㎜ has excellent absorption ability more than 40 dB at 5.8 ㎓.
Key Words: EM Material property;CPE;Amorphous metal powder;EM wave absorber;absorption ability
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