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Evaluation of the EMP shielding effectiveness for the thin metallic shells

机译：薄金属壳的EMP屏蔽效能评价

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It is essential for many EMC problems to evaluate the transient shielding effectiveness of the thin metallic shells. A fast time domain approach is presented to calculate the transient shielding effectiveness of the thin metallic shells excited by an arbitrary waveform electromagnetic pulse. The frequency domain transfer function of the thin metallic shell is fitted into the rational function by the vector fitting method, and the pulse response can be expressed by a sum of decay exponentials in time domain by the inverse Laplace transformation. The transient shielding effectiveness excited by an arbitrary waveform can be obtained easily based on the recursive convolution formulation. The advantage of the proposed method lays two aspects. It is a time domain algorithm without needing the time-consuming FFT approach, and the scheme of recursive convolution can improve the calculation efficiency dramatically. The proposed approach is validated by some numerical examples.
机译：对于许多EMC问题至关重要，以评估薄金属壳的瞬态屏蔽效果。提出了一种快速时域方法以计算通过任意波形电磁脉冲激发的薄金属壳的瞬态屏蔽效果。薄金属壳的频域传递函数通过矢量拟合方法装配到合理功能中，并且脉冲响应可以通过反向拉普拉斯变换的时域中的衰减指数和中的总和表示。通过基于递归卷积制剂可以容易地获得由任意波形激发的瞬态屏蔽效果。所提出的方法的优点在于两个方面。它是一个时域算法，而不需要耗时的FFT方法，递归卷积方案可以显着提高计算效率。通过一些数值例子验证所提出的方法。

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