電磁脈衝屏蔽開口效應研究

Some Studies on the Shielding Effectiveness of Electromagnetic Pulse Coupling Through Apertures

林嘉彞(Chia-Yi Lin)

指導教授 ： 周錫增

元智大學/工程學院/電機工程學系/碩士(2003年)

摘要

本文主要從事電磁脈衝波(EMP)屏蔽防護為主之研究。電磁脈衝屏蔽之屏蔽效能，對於受防護區域的電子儀器或人員的安全有著密不可分的關係。在研究的題材上我們考慮應用金屬屏蔽時因現實需要而存在的開口對於屏蔽效應所造成的影響，目標在於產生一個簡單的方程式來進行預測。研究依據三大方向進行，〈1〉探討現有常用公式對於屏蔽效應預測的有效性，並由理論上討論其預估的機制。〈2〉利用等效原理尋求一個更準確的應用方程式。〈3〉進行數值的驗證。

關鍵字

電磁脈衝 ； 屏蔽效益

並列摘要

Electromagnetic pulse (EMP) produced by lighting or nuclear explosion potentially threats the electronic equipments, which exhibits the increasing importance of EMP shielding to provide proper protection for the equipments. Due to practical application requirement, most of the shieldings exist open apertures that potentially decrease the shielding effectiveness. This project studies the effects due to the presence of the open aperture. In particular, we focus on three major topics: <1> study the effectiveness of currently existing model and interpret it prediction mechanism. <2> develop more accurate model to provide better prediction, and <3> numerically validate the developed models.

並列關鍵字

Electromagnetic Pulse ； Shielding Effectiveness

參考文獻

[2] Chou and Adams, “The Coupling of Electromagnetic Waves Through Long Slots,” IEEE Transactions on EMC, Vol. EMC-19, No. 2, pp. 65-73, May 1977.

[3] C.M. Bulter, Y. Rahmat-Samii, R. Mittra, “Electromagnetic Penetration Through Apertures in Conducting Surfaces,” IEEE Trans. Antennas Propagat., Vol. AP-26, No. 1, pp. 82-93, Jan 1978.

[4] C.A. Balanis, Antenna Theory, John Wiley and Sons, New York, 1997

[6] E.C. Jordan and K.G. Balmain, Electromagnetic Waves and Radiating Systems, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1968

[7] Henry W. Ott, Noise Reduction Techniques in Electronic Systems, Wiley, New York, 1988