电磁脉冲作用下自由空间线缆的感应开路电压

 运用时域有限差分法结合基于Kirchhoff积分的近／远场变换，计算了高功率微波（HPM）和超宽带（UWB）电磁脉冲作用下自由空间不同长度线缆上感应的开路电压，分析了感应电压峰值和线缆长度之间的变化关系以及入射波波形参数对其影响。计算结果表明，辐射场电场强度为50 kV·m^-1的HPM和UWB作用在线缆上可以感应出几百V到数十kV的脉冲电压；感应电压的峰值与线缆长度之间并不是单调线性增加的关系；HPM的载频越高，感应电压峰值越小；UWB的脉冲宽度越宽，感应电压峰值越大。

Induced open-circuit voltage of cables exposed to electromagnetic pulse

The FDTD method and near-to far-field transformation based on Kirchhoff integral were used to calculate the induced open-circuit voltage of cables in free space exposed to HPM and UWB pulse. The influence of the parameters of incident waveform and the relation between the peak value of induced voltage and the length of cable were analyzed. The numerical results indicate that the induced voltage varies with the length of cable and the parameters of incident waveform. Variation of induced voltage peak value is not linear with the length of cable. When the length of cable reaches certain value, it is found that the induced voltage has a maximum peak value. With the electric field intensity of 50 kV·m-1, the peak value of induced voltage can come to several hundred volts even to several ten k