基于锁相环的调频脉冲发生器

Frequency modulated pulse generator based on phase locked loops

研究了现代全相参体制脉冲压缩雷达所要求产生的相参的调频脉冲。为此设计了基于锁相环的调频脉冲发生器，其结构包括锁相环路，扫频控制模块和幅度加权模块。在一定的扫频波形下，选取合适的环路参数。基于锁相环的调频脉冲发生器可以灵活地更改脉冲参数，不仅可形成线性调频信号，也可形成非线性调频信号。此方案已在某全相参雷达中得到应用，并测量了输出信号的功率谱，测量结果与计算值相当一致。

It is necessary for modern coherent pulse compress radar to generate frequency modulated and coherent pulses. The frequency modulated pulse generator based on phase locked loop (PLL) can meet this requirement. The generator includes phase locked loop, frequency sweep control block and amplitude weight block. The key of the design is to chose appropriate loop band width under a given frequency sweep wave. Frequency modulated pulse generator based on PLL can change the signal characters easily to give a linear or no linear frequency modulated signal. This generator has put into practice in a coherent radar and the output signal power spectrum has been measured. The result of the measurement accords with the calculated value.