引信目标射频仿真中的特殊锁相环路

Special PLL used in target RF simulation of the radio detonator

针对某型导弹无线电引信目标射频半实物仿真的需要,提出了一种特殊的环路锁相方法。该方法通过天线耦合引信的发射信号,将经检波得到的调制脉冲信号与高稳时基鉴相,通过控制引信电路的供电电压,从而将引信内部的压控振荡器锁定于固定频率,同时提供引信电路工作的较大电流。通过锁相环路的应用可减小延时后的脉冲抖动并得到准确的延时时间。给出了该锁相环路的设计和实现,及实际实验结果。

To meet the requirements of the target radio frequency（RF） hardware-in-the-loop simulation of the radio detonator, a method using a special phase lock loop（PLL） is presented. By use of the modulation signal detected from the detonator transmission siqnal coupled by the antenna and the time base for phase discrimination to control the power supply of the detonator, the output of the inner voltage-controlled oscillator is locked to the fixed frequency, The PLL offers the heavy current required by the detonator at the same time. The delayed pulse jitter is reduced and the exact delay time is obtained by using the PLL, The design and realization are presented and the test result is given.