电磁脉冲辐射器近区场数值模拟

Numerical analysis on the near-field of the EMP radiator

电磁脉冲辐射器是便携式电磁脉冲电场屏蔽效能测试设备的关键部分。提出了一套小型电磁脉冲辐射器的方案,并采用时域有限差分法在计算机上模拟了辐射器产生的近区电磁场,结果表明,如果高压脉冲源产生的脉冲电压为双指数波,则通过天线辐射产生的近区场的波形也为双指数波,从而,使近场参数均能达到测试设备所要求的指标,说明所提供电磁脉冲辐射器的方案为可行。

The EMP radiator is the key part of the portable measurement equipment of electric field shielding efficacy . In this dissertation a plan of a small-sized EMP radiator is provided, and the radioactive near field emitted by radiator is analyzed by the finitedifference timedomain algorithm. It is demonstrated that if the high voltage pulse generator produces voltage pulse of he form of double exponential function, the waveform of nearfield produced by the EMP radiator will be double exponential waveform. The nearfield parameters accord with measurement equipment requirements. So the plan of EMP reaiator is feasible.