L波段微波脉冲对微型计算机的辐照效应实验  

Radiation effects of microwave pulses in L band on personal computer

作　　者：刘长军[1] 闫丽萍[1] 范如东[1] 罗俊[1] 蒲天乐[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《强激光与粒子束》2007年第9期1580-1584,共5页High Power Laser and Particle Beams

基　　金：国家863计划项目资助课题

摘　　要：在L波段使用1.3 GHz载波频率的微波脉冲辐照微型计算机主板,通过改变脉冲宽度、重复频率和脉冲串长度等参数,实验研究了微波脉冲辐照导致微型计算机失去响应的功率阈值的变化规律,讨论了L波段微波脉冲辐射的积累效应。实验结果表明:当微波脉冲宽度增加时,微波功率阈值下降;当微波脉冲重复频率升高时,微波功率阈值呈下降趋势;在固定重复频率的条件下,微波脉冲数目的增加也会导致微波功率阈值的下降;微波脉冲功率阈值始终小于连续波微波的功率阈值。当微波脉冲间隔时间较长或者脉冲宽度较宽时,微波功率阈值由单个微波脉冲的参数确定,与脉冲重复频率没有明显关系。利用假设的微波脉冲辐射积累效应,可以定性解释和分析微波脉冲辐照微型计算机实验中功率阈值变化的趋势。The radiation effects of L band microwave pulses with a carrier frequency at 1.3 GHz on a personal computer motherboard are studied in this paper. Microwave pulse power thresholds are achieved in experiments with different pulse parameters, such as pulse width, pulse repetition frequency and pulse number. Microwave radiation beyond power thresholds will lead to personal computer system crashes. Moreover, the cumulative effects of microwave pulse radiation are discussed briefly as well. The power thresholds decrease, when either the pulse width is longer, or the pulse repetition frequency is higher, or the pulse number at a fixed repetition frequency increases. The power thresholds of pulsed microwave are always less than that of continuous microwave. On the other hand, when either the interval between microwave pulses or the microwave pulse width is long, the power thresholds are determined only by characteristics of a single microwave pulse and are independent on the repetition frequency. The experiment phenomena can be analyzed and explained with the cumulative effects of microwave pulse radiation.

关 键 词：微波脉冲 微型计算机 电磁兼容 辐照效应 功率阈值 

分 类 号：O441.4[理学—电磁学]