Characteristics of Electromagnetic Wave Absorber Sheet for 2.4 GHz Wireless Communication Frequency Bands Using Fe Based Alloy Soft Magnetic Metal Powder

ByeongCheol Kim; ManCheol Seo; Yeochun Yun

doi:10.3740/MRSK.2019.29.9.532

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2019 Vol.29, Issue 9 Preview Page Next Page

Characteristics of Electromagnetic Wave Absorber Sheet for 2.4 GHz Wireless Communication Frequency Bands Using Fe Based Alloy Soft Magnetic Metal Powder Fe-계 연자성 금속분말을 이용한 2.4 GHz 대역 무선통신용 전파 흡수체의 특성 평가

September 2019. pp. 532-541

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Abstract

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.

Keywords

soft magnetic powder

absorber

reflection Loss

wireless LAN

References

D. G. Kang, Establish and Revision of New Electromagnetic Interference Criteria, p.11, J. Korea Radio Promotion, Seoul (1996).

H. S. Cho and S. S. Kim, IEEE Trans. Mag., 35, 3151 (1999).10.1109/20.801111

I.-G. Chen, S.-H. Hsu and Y.-H. Chang, J. Appl. Phys., 87, 6247 (2000).10.1063/1.372669

S. S. Kim, S. T. Kim, Y. C. Yoon and K. S. Lee, J. Appl. Phys., 97, 10F905 (2005).

K. S. Lee, Y. C. Yun, I. B. Jeong and S. S. Kim, Mater. Sci. For., 534, 1465 (2007).10.4028/www.scientific.net/MSF.534-536.1465

S. H. Moon, S. J. Shin, J. M. Song, D. Il Kim and K. M. Kim, J. Korea Electromagnetic Engineering Soc., 14, 1329 (2003).

K. Akita, Ferrites: Proceed. of ICF, p. 885, Center for academic publications, D. Reidel Publishing Company, Dordrecht Boston London (1980).

S. S. Kim, D. H. Han and S. B. Jo, IEEE Trans. Mag., 30, 4554 (1994).10.1109/20.334146

Y. Naito, J. Phys. Ⅳ, 7, C1-405 (1997).

10.

S. S. Kim, S. B. Jo, K. I. Kwon, K. K. Choi, J. M. Kim and K. S. Churn, IEEE Trans. Magn., 27, 5462 (1991).10.1109/20.278872

11.

Y. Naito, K. Suetake, IEEE Trans. Micro. Theory Tech., 19, 65 (1971).10.1109/TMTT.1971.1127446

12.

S. Yoshida, M. Sato, E. Sugawara and Y. Shimada, J. Appl. Phys., 35, 4636 (1999).10.1063/1.370432

13.

X. Zhang, T. Ekiert, K. M. Unruh, J. Q. Xiao, M. Golt and R. Wu, J. Appl. Phys., 99, 08M914 (2006).10.1063/1.2175657

14.

Y. J. Kim, Magnetic Property and Microwave Absorbance of Hexaferrites at Ka-band (26.5-40 GHz), p.20, Department of Materials Engineering Graduate School, Chungbuk National University Cheongju, Korea (2001).

Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 29
No :9
Pages :532-541
Received Date : 2019-07-09
Revised Date : 2019-08-08
Accepted Date : 2019-08-19
DOI :https://doi.org/10.3740/MRSK.2019.29.9.532

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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