논문 상세보기
pp.532-541
Information and communication technologies are developing rapidly as IC chip size becomes smaller and information processing becomes faster. With this development, digital circuit technology is being widely applied to mobile phones, wireless LANs, mobile terminals, and digital communications, in which high frequency range of GHz is used. In highdensity electronic circuits, issues of noise and EMC(Electro-Magnetic Compatibility) arising from cross talk between interconnects or devices should be solved. In this study, sheet-type electromagnetic wave absorbers that cause electromagnetic wave attenuation are fabricated using composites based on soft magnetic metal powder and silicon rubber to solve the problem of electromagnetic waves generated in wireless communication products operating at the frequency range of 2.4 GHz. Sendust(Fe-Si-Al) and carbonyl iron(Fe-C) were used as soft magnetic metals, and their concentrations and sheet thicknesses were varied. Using soft magnetic metal powder, a sheet is fabricated to exhibit maximum electromagnetic attenuation in the target frequency band, and a value of 34.2dB(99.9 % absorption) is achieved at the target frequency.
1. 서 론
2. 실험 방법
2.1 전파 흡수체 재료의 선정
2.2 원료 분말(Filer) 준비
2.3 전파 흡수체 시트(Sheet) 제조
2.4 전자파 감쇄율(반사손실; Reflection Loss)의 측정 방법
3. 실험 결과 및 고찰
3.1 금속 분말 함량 변화에 따른 시편의 재료 정수의 측정
3.2 분말 함량 변화에 따른 시료의 전자파 감쇄율(반사손실; Reflection Loss)
4.결 론
References
