调制电路在被动型铷频标体系内优势组合中的应用

Study on modulation circuit based on merit integration in a passive rubidium frequency standard

在被动型原子频标中,调制电路在物理系统与光电检测环节起到非常重要的作用,通过对微波探询信号加一小调频,完成物理系统的原子纠偏信号转换成伺服检测电路用信号过程。整个调制电路中主要的参数是调制深度、调制幅度以及调制信号的相位。其工作参数的稳定与否直接对原子频标的频率稳定度带来影响。针对被动型原子频标中调制电路特性,采用DDS、单片机数字调制方案对环路参数作了具体的设置的工作,通过原子频标的稳定度测量结果说明实际取得满意的实验结果。

The Modulation circuit is the bridge of changing the error signal of physics system to servo signal of circuit in the passive atomic frequency standard.The working parameters of depth,Amp,phase of modulating that affect the frequency stability are discussed in detail,and the measurement results based on the setting of the corresponding parameters are given.