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A Study on SAR Variation by Folding Angle and EMI Paint Distribution of Case for Mobile Handsets  

이규호 (인천대학교 전자공학과)
김창일 (인천대학교 전자공학과)
양운근 (인천대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.14, no.4, 2003 , pp. 421-430 More about this Journal
Abstract
In this paper, we propose a method to consider SAR(Specific Absorption Rate) at beginning stage of handsets development. First, simulation was carried out with changing folding angle from 150$^{\circ}$to 142$^{\circ}$. Simulation results show that SAR value is decreased with decreasing the folding angle. When folding angle is 142$^{\circ}$, error between simulation and measurement results is about 3.95 %. Second, we made some experiments with EMI (Electromagnetic Interference) paint, and its results show that different pattern of EMI paint have different SAR values. After removing EMI paint at the lower part of antenna feeding point, we got the decrease efficiency of 15.46 % for SAR value. When we applied zigzag painting pattern, we got the highest SAR decrease efficiency.
Keywords
SAR(Specific Absorption Rate); EMI Paint; Handset;
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