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http://dx.doi.org/10.5394/KINPR.2010.34.1.015

A Study on EM Wave Absorber for Electromagnetic Wave Environment of Wireless LAN at 5.2 GHz  

Yoo, Gun-Suk (Dept. of Radio Sciences and Engineering, Korea Maritime Univ.)
Choi, Dong-Soo (Dept. of Radio Sciences and Engineering, Korea Maritime Univ.)
Kim, Dong-Il (Dept. of Radio Sciences and Engineering, Korea Maritime Univ.)
Publication Information
Journal of Navigation and Port Research / v.34, no.1, 2010 , pp. 15-19 More about this Journal
Abstract
Recently, the wireless LAN system is rapidly growing because of its convenience of high speed communication. However, the wireless LAN systems at indoor places occur multi-propagation path by reflected waves from walls, ceilings, floors, and desks. Multipath problems cause transmission errors and degradation of communication speed. These problems can be solved by using EM wave absorbers. In this paper, we analyzed property of Graphite and derived the optimum ratio of Graphite: CPE to develop EM wave absorber for the wireless LAN system. First, we fabricated several samples in different composition ratios of Graphite and CPE, and then measured the reflection coefficient of each samples. Material constants of permittivity and permeability were calculated using the measured data and designed EM wave absorber. Secondly, the EM wave absorber was fabricated and tested on the base of the simulation data. As a result, it showed that the EM wave absorber in 1.7 mm thickness with the ratio of Graphite: CPE=50:50 wt.% has excellent absorption ability more than 27 dB at 5.2 GHz.
Keywords
EM wave absorber; Graphite; Wireless LAN; material constant; absorption ability; multipath problem;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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