调频连续波引信超宽带电磁脉冲前门耦合效应

针对调频连续波(frequency modulation continuous wave, FMCW)引信在超宽带电磁脉冲环境下易受干扰的问题,将场路联合仿真的方法应用于引信射频前端超宽带电磁脉冲耦合效应研究。仿真实验采用先辐照后注入的方法,首先对引信射频前端模型进行平面波辐照;然后将耦合电压导入引信接收机进行效应分析。实验结果表明,超宽带强电磁脉冲很难对接收机内部元器件造成毁伤,其耦合效应主要体现为干扰效应,当耦合进入接收机中频带的能量足够淹没正常输出信号能量时,引信测距功能会受到干扰。

Front-door coupling effect of ultra-wideband electromagnetic pulse for FMCW fuze

Aiming at the problem that frequency modulation continuous wave (FMCW) fuze is susceptible to interference in the ultra-wideband electromagnetic pulse environment, the method of field-circuit joint simulation is applied to studing the coupling effect of ultra-wideband electromagnetic pulse in the radio frequency (RF) front end of fuze. The simulation experiment adopts the method of first irradiation and then injection. Firstly, the fuze RF front-end model is irradiated by plane wave, and then the coupling voltage is introduced into the fuze receiver for effect analysis. The experimental results show that ultra-wideband electromagnetic pulse can hardly damage the internal components of the receiver, and its coupling effect is mainly reflected in the interference effect. When the energy of coupling into the intermediate frequency band of the receiver is enough to submerge the normal output signal energy, the fuze ranging function will be disturbed.