不同极化方向电磁脉冲作用于计算机机箱的效应分析  

Numerical Analysis for EMP Having Different Polarization Direction Coupling to a Computer Case

作　　者：廖成[1] 杨丹[1] 方剑[2] 

机构地区：[1]西南交通大学电磁所,成都610031 [2]中国西南电子设备研究所,成都610036

出　　处：《微波学报》2007年第4期28-31,共4页Journal of Microwaves

基　　金：国家自然科学基金资助项目(10476021)

摘　　要：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-difference time-domain method is used to study the coupling of the electromagnetic pulse to the computer case through slots or holes on it. EMP with different incident directions and different polarization direction coupled into computer case is discussed respectively. Some conclusions can be obtained from simulation ： （ 1 ） The energy coupled into the computer case mainly comes from the slots on cabinet＇ s front panel; （2） The EM wave can more easily transmit down inside the computer case and energy is much more in the middle of it when EMP is oblique incidence down from above of the computer case＇ s front panel compared with perpendicular incidence to the front panel; （3） The coupled energy when EMP＇ s polarization direction is perpendicular to the slots is much more than that when it is parallel to the slots.

关 键 词：时域有限差分法 电磁脉冲 耦合 计算机机箱 

分 类 号：TP303[自动化与计算机技术—计算机系统结构]