微型计算机微波辐照效应的实验研究

 微波辐照频率为1.2~2.0 GHz时，利用宽带天线对微型计算机主板进行微波辐照，考察了微波辐照载波频率、调制方式和调制深度对微波辐照效应的影响，得到了计算机分别处于满负荷工作、内存读写操作、磁盘读写操作和系统空闲4种工作状态下的微波辐照干扰功率阈值。实验结果表明：微波辐照的载波频率为1.47 GHz时，辐照干扰功率阈值最低,为32.7 dBm，计算机最易被干扰；瞬时功率是干扰微型计算机的关键参数，调制方式、调制频率和深度对微波辐照干扰功率阈值影响不大；处于高负荷工作状态的微型计算机更易于被微波辐射干扰；计算机启动的干扰功率阈值为32.0 dBm，小于正常工作状态时的阈值。

Experimental study on microwave radiation effects on personal computer

The microwave radiation effects on a personal computer are investigated experimentally in the frequency range from 1.2 to 2.0 GHz.The microwave power threshold for the computer to be crashed is studied under various microwave carrier frequencies,modulation types and modulation degrees.The microwave power thresholds are obtained under 4 computer operating states,the full CPU load,the disk operating,the memory reading and writing and the system idle.The microwave radiation effect on the computer during system booting is also studied.The experimental results show that when the microwave carrier frequency is 1.47 GHz,the computer is interfered most easily.At low modulation frequency,the instantaneous microwave power is the key effect factor of the microwave radiation on the personal computer motherboard,and the modulation type,modulation frequency and degree affect the mocrowave radiation little.The high-load operating computer is interfered more easily.The computer during self testing is easier to be crashed under microwave radiation.