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EM Wave Absorption Properties on Particle Size and Permeability of ferrite and Preparation Temperature in Absorbers for Mobile Phones  

김동일 (한국해양대학교 전파공학과)
옥승민 (한국해양대학교 전파공학)
송재만 (한국해양대학교 산업기술연구)
김기만 (한국해양대학교 전파공학)
신승재 (한국해양대학교 전파공학)
문상현 (한국해양대학교 전파공학과)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.4, 2004 , pp. 406-413 More about this Journal
Abstract
In this study, we investigated the reflection coefficient of absorbers fur mobile phone on average Particle size and preparation temperature of specimens. We used recycled MnZn ferrite with initial permeability of 2,500 and 10,000 as starting materials. Absorption ability increased at 1.8 ㎓ which is frequency fur mobile phones with increasing average particle size. We developed a sheet type electromagnetic wave absorber with the thickness of 1 mm which showed reflection coefficient of -3.8 ㏈ at 1.8 ㎓.
Keywords
Mobile Phone; Absorber; MnZn Ferrite; Particle Size; Preparation Temperature;
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