Application of Digital Demodulation of AM Signal in Error Processing of Atomic Clcok
At present,all atomic frequency standards are based on the resonant of atoms or ions,and use the standard frequency of quantum energy level transitions.One of the microwave atomic clocks widely used in China is the hydrogen maser atomic clock,which has excellent long-term frequency stability.To accurately measure the atomic frequency,it is necessary to precess the hydrogen maser signal.A method discussed in this paper is how to extract the hydrogen mase signal based on the passive dual frequency detection mechanism and the corresponding microwave cavity frequency control signal of the atomic clock through digital demodulation,and then realize servo control through software algorithm feedback after digital and analog sampling,and output a stable reference frequency source after locking.
AM signaldigital demodulationatomic clockerror processing
万方数据
维普
