大功率PIN二极管限幅器对电磁脉冲后沿响应的分析

 利用PSpice电路模型数值计算了阶跃电磁脉冲后沿作用下大功率PIN二极管限幅器的瞬态响应。发现大功率限幅器在阶跃脉冲后沿作用下会输出反向脉冲，其幅度可能与限幅器尖峰泄漏的幅值相当甚至更大，这可能是一种新的影响限幅器性能的安全隐患。分析发现:反向脉冲幅度在一定范围内随激励脉冲持续时间的增加、幅度的加大、后沿时间的变短而变大;随射频扼流电感值的增加而减小。

Response of high power PIN diode limiter to electromagnetic pulse descending edge

The transient response of the high power PIN diode limiter to the step electromagnetic pulse descending edge is calculated by PSpice. Pulse-inversion is observed in the output of the high power PIN diode limiter while the limiter is affected by the step pulse descending edge. The magnitude of the pulse-inversion is equivalent to or in some conditions even larger than spike leakage. Besides the spike leakage, the pulse-inversion may be another potential safety hazard to the high power limiter. The magnitude of the pulse-inversion increases with the augment of the duration and magnitude of the input pulse, and decreases of the input pulse’s fall time and value of the RF impedance inductor.