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利用时域有限差分法(FDTD)分析了电磁脉冲对计算机机箱的耦合规律。讨论了不同极化方向的线极化电磁脉冲在正向时对计算机机箱的耦合规律和上方斜入射时对计算机机箱的耦合规律。研究表明:耦入计算机机箱的功率密度主要来自于机箱正面的窄缝;上方斜入射较正面入射时,耦入波向机箱下部传播,使得机箱中部功率增大;对于耦合进机箱的功率密度,垂直极化比平行极化入射时大得多。
The finite element method (FDTD) is used to analyze the coupling rule of the electromagnetic pulse to the computer case. The coupling law of the computer case and the coupling law of the computer case when the linearly polarized electromagnetic pulse with different polarization direction is in forward direction are discussed. The results show that the power density in the computer chassis mainly comes from the narrow slot on the front of the chassis. When the upper oblique incident is incident on the front, the incoming wave propagates to the lower part of the chassis, so that the power in the middle of the chassis increases. For the power density coupled into the chassis, Vertical polarization is much larger than parallel polarization.