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电大开孔箱体屏蔽效能分析解析模型

张亚普 达新宇 祝杨坤 赵蒙

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电大开孔箱体屏蔽效能分析解析模型

张亚普, 达新宇, 祝杨坤, 赵蒙

Formulation for shielding effectiveness analysis of a rectangular enclosure with an electrically large aperture

Zhang Ya-Pu, Da Xin-Yu, Zhu Yang-Kun, Zhao Meng
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  • 电磁脉冲武器能够通过“前、后门”耦合效应对箱体内部电子元器件及电路板造成损伤, 从而对电气电子设备的安全性构成严重威胁, 因此, 开展箱体电磁屏蔽效能的分析研究具有重要意义. 推导了任意入射波条件下电大开孔箱体屏蔽系数的解析解, 并在此基础上对箱体屏蔽效能进行了分析研究. 首先通过矢量分解, 得出任意入射平面波的坐标分量; 再基于Cohn模型, 获得了电大开孔的等效电偶、磁偶极子; 然后通过镜像原理, 计算出总的赫兹电矢量位、磁矢量位; 最终求得电大开孔箱体内部任意观测点的电场解析解, 用于箱体屏蔽系数计算. 设计了5组验证性实验, 仿真结果表明: 该解析算法相对CST的均方误差为11.565 dB, 绝对误差为8.015 dB, 相关系数为0.921, 从而验证了该算法的准确性; 解析算法仿真的平均耗时为0.183 s, 仅占CST耗时的1/7530, 从而验证了该算法的高效性.
    Since electric components and printed circuit board in the enclosure can be destroyed by electromagnetic pulse weapons through “front door and back door” coupling, which is a great threat to the operational security, the study of the shielding effectiveness is of important significance. A formulation for shielding effectiveness analysis of a rectangular enclosure with an electrically large aperture is proposed in this paper. Firstly, the plane wave with oblique incidence and polarization is decomposed. Secondly, based on the Cohn model, the equivalent electric and magnetic dipole of the electrically large aperture is computed. Thirdly, the total Hertz electric and magnetic vector potential is obtained through mirror procedure. Finally, the electric field inside an enclosure with electrically large aperture is formulated, which is used for shielding effectiveness calculation. Five verification experiments are designed. Simulation result shows that the mean square error and absolute error of this method compared to computer simulation technology (CST) microwave studio are 11.565 dB and 8.015 dB respectively, the correlation coefficient is 0.921, through which the accuracy of this method is verified. The simulation time of this method is 0.183 s, which is only 1/7530 times of CST, so its efficiency is obvious.
    • 基金项目: 国家自然科学基金(批准号:61271100,61271250)、陕西省自然科学基础研究重点项目(批准号:2010JZ010)和通信网信息传输与分发技术重点实验室基金(批准号:ITD-U2003/K1260009)资助的课题.
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61271100, 61271250), the Major Program of Natural Science Basic Research of Shaanxi Province, China (Grant No. 2010JZ010), and the Foundation of Communication Network Information Transmission and Distribution Technology Laboratory, China (Grant No. ITD-U2003/K1260009).
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    Wang T, Harrington R F, Mautz J R 1990 IEEE Trans. Antennas Propag. 38 1805

    [7]

    Li J, Guo L X, Zeng H, Han X B 2009 Chin. Phys. B 18 2757

    [8]

    Render M C, Marvin A C 1995 IEEE Trans. Electromagn. Compat. 37 488

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    Robinson M P, Benson T M, Christopoulos C, Dawson J F, Ganley M D, Marvin A C, Porter S J, Thomas D W P 1998 IEEE Trans. Electromagn. Compat. 40 240

    [10]

    Konefal T, Dawson J F, Marvin A C, Robinson M P, Porter S J 2005 IEEE Trans. Electromagn. Compat. 47 678

    [11]

    Dehkhoda P, Tavakoli A, Moini R 2008 IEEE Trans. Electromagn. Compat. 50 208

    [12]

    Jongjoo S, Dong G K, Jong H K, Joungho K 2010 IEEE Trans. Electromagn. Compat. 52 566

    [13]

    Belkacem F T, Bensetti M, Boutar A G, Moussaoui D, Djennah M, Mazari B 2011 IET Sci. Meas. Technol. 5 88

    [14]

    Nitsch J B, Tkachenko S V, Potthast S 2012 IEEE Trans. Electromagn. Compat. 54 1252

    [15]

    Solin J R 2011 IEEE Trans. Electromagn. Compat. 53 82

    [16]

    Solin J R 2012 IEEE Trans. Electromagn. Compat. 54 188

  • [1]

    Jiao C Q, Niu S 2013 Acta Phys. Sin. 62 114102 (in Chinese) [焦重庆, 牛帅 2013 物理学报 62 114102]

    [2]

    Ji W J, Tong C M 2013 Chin. Phys. B 22 020301

    [3]

    Lu X C, Wang J G, Liu Y, Li S, Han F 2013 Acta Phys. Sin. 62 070504 (in Chinese) [陆希成, 王建国, 刘钰, 李爽, 韩峰 2013 物理学报 62 070504]

    [4]

    Fan J Q, Hao J H, Qi P H 2014 Acta Phys. Sin. 63 014104 (in Chinese) [范杰清, 郝建红, 柒培华 2014 物理学报 63 014104]

    [5]

    Jiao C Q, Zhu H Z 2013 Chin. Phys. B 22 084101

    [6]

    Wang T, Harrington R F, Mautz J R 1990 IEEE Trans. Antennas Propag. 38 1805

    [7]

    Li J, Guo L X, Zeng H, Han X B 2009 Chin. Phys. B 18 2757

    [8]

    Render M C, Marvin A C 1995 IEEE Trans. Electromagn. Compat. 37 488

    [9]

    Robinson M P, Benson T M, Christopoulos C, Dawson J F, Ganley M D, Marvin A C, Porter S J, Thomas D W P 1998 IEEE Trans. Electromagn. Compat. 40 240

    [10]

    Konefal T, Dawson J F, Marvin A C, Robinson M P, Porter S J 2005 IEEE Trans. Electromagn. Compat. 47 678

    [11]

    Dehkhoda P, Tavakoli A, Moini R 2008 IEEE Trans. Electromagn. Compat. 50 208

    [12]

    Jongjoo S, Dong G K, Jong H K, Joungho K 2010 IEEE Trans. Electromagn. Compat. 52 566

    [13]

    Belkacem F T, Bensetti M, Boutar A G, Moussaoui D, Djennah M, Mazari B 2011 IET Sci. Meas. Technol. 5 88

    [14]

    Nitsch J B, Tkachenko S V, Potthast S 2012 IEEE Trans. Electromagn. Compat. 54 1252

    [15]

    Solin J R 2011 IEEE Trans. Electromagn. Compat. 53 82

    [16]

    Solin J R 2012 IEEE Trans. Electromagn. Compat. 54 188

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出版历程
  • 收稿日期:  2014-05-20
  • 修回日期:  2014-06-26
  • 刊出日期:  2014-12-05

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