用时域有限差分法分析带孔外壳的屏蔽效能

2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03. Pub Date : 2003-05-16 DOI:10.1109/ICSMC2.2003.1428253

Chaoqun Jiao, Lin Li

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引用次数: 2

摘要

采用时域有限差分(FDTD)方法，研究了核电磁脉冲(NEMP)波与不同频率的连续正弦波通过金属容器表面的小孔耦合进入金属容器的过程。NEMP的入射电场用两种不同衰减常数的双指数函数表示。基于时域有限差分法中的薄板算法，区分处理了两薄板共同边界处电磁分量的有限差分表达式。介绍了一种计算薄壁带孔金属外壳屏蔽效能的方法。利用时域有限差分法(FDTD)得到了金属容器内电场在电磁波作用下的时域特性。比较了时域有限差分法和ETL法的建模结果，验证了时域有限差分法的有效性

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Analysis of shielding effectiveness of enclosure with an aperture using FDTD method

The finite difference time-domain (FDTD) method was used to study the nuclear electromagnetic pulse (NEMP) waves and the continuous sinusoidal wave of different frequency coupling into one metallic container through a small aperture in one face of the container. The incident electric fields of NEMP were expressed by double exponential functions with two different decay constants. Based on the algorithm of thin material sheets in the FDTD method, the finite-difference expressions of the electromagnetic components at the common boundary of two thin sheets are dealt with distinguishingly. A method to compute the shielding effectiveness of the metal enclosure with an aperture and thin walls is introduced. The time-domain behavior of the electric field inside the metallic container excited by the waves was obtained by the FDTD method. The results of FDTD and ETL method are compared in order to verify the validity of FDTD modeling

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来源期刊

2003 IEEE International Symposium on Electromagnetic Compatibility, 2003. EMC '03.

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