超宽带电磁脉冲对腔体孔缝耦合效应的数值模拟
Numerical simulation on coupling effects of ultra wide band electromagnetic pulse into slots in a cavity
1 海军工程大学 电子工程学院, 武汉 430033
2 海军装备研究院, 北京 100161
摘要
为了解孔缝耦合对超宽带电磁脉冲干扰和毁伤电子设备的影响, 应用时域有限差分法对长方腔体上不同形状的孔缝耦合效应进行了数值研究。选取mm量级的微小孔缝为研究对象, 分析不同入射角度、不同脉宽的激励源对耦合效应的影响, 得到了孔腔共振效应、孔缝增强效应和腔体内场强的分布规律。研究表明：长方孔在孔缝附近存在明显的增强效应, 超宽带脉冲对正三角孔和方阵的耦合系数最小, 脉宽短的入射脉冲耦合效应明显强于脉宽长的脉冲, 耦合效应基本随入射角的减小而缓慢减小。
Abstract
Aperture coupling is a main coupling mode through which ultra wide band(UWB) electromagnetic pulse(EMP) can disturb or damage many equipments. Coupling effects of slots with different shapes in a cuboid object are studied using finite difference in time domain(FDTD) method. Selecting slots with dimension of several millimeters as research object, coupling effects by varied incident angles and varied pulse widths are analyzed. Interior resonance effect, increase effect around slots and several distributing rules of electric field in the cavity are got. The main results include: clear increase effect occurs around rectangle slot; coupling coefficients of triangle slot and array are obviously smaller than that of other slots; coupling effect of incident pulse with short pulse width is obviously better than the one with long pulse width; coupling effect weakens as incident angle diminishes.
参考文献
[1] Camp M, Garbe H, Nitsch D. UWB and EMP susceptibility of modern electronics［C］//Proceedings of IEEE International Symposium on Electromagnetic Compatibility. 2001, 2:1015-1020.
[2] Sullivan D M. Electromagnetic simulation using the FDTD method［M］. New York: IEEE Press, 2000.
[3] 付继伟,侯朝桢,窦丽华.电磁脉冲斜入射时对孔缝耦合效应的数值分析［J］.强激光与粒子束, 2003, 15(3):249-252.(Fu Jiwei, Hou Chao-zhen, Dou Lihua. Numerical analysis on hole coupling effects of an oblique incidence of electromagnetic pulse. High Power Laser and Particle Beams, 2003, 15(3):249-252)
[4] 陈修桥,张建华,胡以华.电磁脉冲与窄缝腔体耦合共振特性分析［J］.强激光与粒子束, 2003, 15(5):481-484.(Chen Xiuqiao, Zhang Jianhua, Hu Yihua. Analysis on resonant characteristic of electromagnetic pulse coupling into narrow slot and cavity with slot. High Power Laser and Particle Beams, 2003, 15(5):481-484)
[5] 刘强,朱占平,钱宝良.内孔缝位置对嵌套腔体微波耦合特性的影响［J］.强激光与粒子束, 2007, 19(6):919-922.(Liu Qiang, Zhu Zhanping, Qian Baoliang. Influence of inner slot position on the coupling of microwave into nested cavities. High Power Laser and Particle Beams, 2007, 19(6):919-922)
[6] 王建国,刘国治,周金山.微波孔缝线性耦合函数研究［J］.强激光与粒子束, 2003, 15(11):1093-1099.(Wang Jianguo, Liu Guozhi, Zhou Jinshan. Investigations on function for linear coupling of microwaves into slots. High Power Laser and Particle Beams, 2003, 15(11):1093-1099)
[7] 周璧华,陈彬,石立华.电磁脉冲及其工程防护［M］.北京:国防工业出版社, 2003.(Zhou Bihua, Chen Bin, Shi Lihua. Electromagnetic pulse and electromagnetic pulse protection. Beijing: National Defence Industry Press, 2003)
肖金石, 刘文化, 张世英, 张金华. 超宽带电磁脉冲对腔体孔缝耦合效应的数值模拟[J]. 强激光与粒子束, 2010, 22(12): 2959. Xiao Jinshi, Liu Wenhua, Zhang Shiying, Zhang Jinhua. Numerical simulation on coupling effects of ultra wide band electromagnetic pulse into slots in a cavity[J]. High Power Laser and Particle Beams, 2010, 22(12): 2959.
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