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EMI Problem and Solutions of Unusual Harmonics in Low-Speed PCB
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 Title & Authors
EMI Problem and Solutions of Unusual Harmonics in Low-Speed PCB
Kim, Chan-Su; Lee, Hai-Young;
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In this paper, unusual harmonics noise problem of digital electronic products in mass production was introduced and a practical solution was proposed. Generally, 5th or higher harmonics noise level has been ignored in circuit designs because over 5th harmonics noise decreases by 40 (dB/decade). Through some measurements, it is confirmed that over 10th harmonics noise can propagate and radiate in case of a certain PCB or housing conditions. We propose a capacitively loaded micro-strip low pass filter for commercial products having spatial design constraints and measured the effectiveness. The proposed structure can solve both of the continual increment of harmonics noise level and the spatial design constraint of commercial products. We expect the proposed method be effectively used for various digital electronic products.
EMC(Electromagnetic Compatibility);EMI(Electromagnetic Interference);LDWS(Lane Departure Warning System);Harmonics;GHz(Gigahertz);
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확산 스펙트럼 생성기를 이용한 적외선 카메라의 방사노이즈 저감에 관한 연구,최봉준;이용춘;윤주현;김은준;

한국전자파학회논문지, 2016. vol.27. 12, pp.1097-1104 crossref(new window)
송재만, "전자파 장해 방지 기준 및 시험방법개정(안) 최근 동향", 한국전자파학회논문지, 23(2), pp. 54-62, 2012년 3월.

정기범, "최근 자동차 EMC 대책 기술 동향", 한국전자파학회논문지, 21(4), pp. 65-71, 2010년 7월.

Christopoulos Christos, Principles and Techniques of Electromagnetic Compatibility, pp. 349-364, CRC PRESS, 2007.

Henry W. Ott, Electromagnetic Compatibility Engineering, pp. 215-216, Wiley, 2009.

Ansoft Corporation, Ansoft SIWAVE, Ver.14.0.0, Korea.

L. D. Smith, R. E. Anderson, D. W. Forehand, T. J. Pelc, and T. Roy, "Power distribution system design methodology and capacitor selection for modern CMOS technology", IEEE Transactions on Advanced Ackaging, vol. 22, no. 3, pp. 284-291, Aug. 1999. crossref(new window)

Mikhail Popovich, Eby G. Friedmang, and G. Chang, "Impedance characteristics of decoupling capacitors in multi-power distribution systems", IEEE International Conference on Electronics, Circuits and Systems, pp. 160-163, Dec. 2004.

C. R. Paul, "Effectiveness of multiple decoupling capacitors", IEEE Trans. Electromagn. Compat., vol. EMC- 34, no. 2, pp. 130-133, May 1992.

J. C. Engle brecht, K. Hermes, "A study of decoupling capacitors for EMI reduction", International Business Machines, Technical Report, TR-51.0152, May 1984.

Kenneth L. Kaiser, Electromagnetic Compatibility Handbook, pp. 29.24-29.37, CRC PRESS, 2005.

Mark I. Montrose, Printed Circuit Board Design Technique for EMC Compliance, IEEE, PRESS, 2000, pp. 68-69, 1999.

Mark I. Montrose, EMC and the Printed Circuit Board: Design, Theory, and Layout Made Simple, pp. 294-296, Wiley, 1999.

김동일, "전자파 장해 대책 및 측정기술", pp. 67-68, 홍릉과학출판사, 2008년.

김종훈, 최철승, "6 GHz EMI/EMC 대책 설계 기술의 방향", 한국전자파학회논문지, 24(1), pp. 52-65, 2013년 1월.


Bob Carter, "Ultra-thin embedded capacitance laminates and how they improve the PDN and can impact EMC", IEEE EMC Society Meeting Present, Jan. 2010.

M. Xu, T. H. Hubing J. Chen, T. P. Van Doren, J. L. Drewniak, and R. E. DuBroff, "Power-bus decoupling with embedded capacitance in printed circuit board design", IEEE Trans. Electromagn. Compat., vol. 45, no. 1, pp. 22-30, Feb. 2003. crossref(new window)

CST(Computer Simulation Technology) Inc, Korea.

이재열, "Signal and power intergrity solution notes", pp. 157, 2014.

Jia-Sheng Hong, Microstrip Filters for RF/Microwave Applications, pp. 77-78, 112-115, Wiley, 2011.

David M. Pozar, Microwave Engineering, pp. 389-398, Wiley, 2005.

IPC-D-317A "Design guidelines for electronic packaging utilizing high-speed techniques", pp. 29, 1995.