Title :
A low noise and ultra-narrow bandwidth frequency-locked loop based on the beat method
Author :
Gao, Wei ; Sui, Jianping ; Chen, Zhiyong ; Yu, Fang ; Sheng, Rongwu
Author_Institution :
Wuhan Inst. of Phys. & Math., Chinese Acad. of Sci., Wuhan, China
fDate :
6/1/2011 12:00:00 AM
Abstract :
A novel frequency-locked loop (FLL) based on the beat method is proposed in this paper. Compared with other frequency feedback loops, this FLL is a digital loop with simple structure and very low noise. As shown in the experimental results, this FLL can be used to reduce close-in phase noise on atomic frequency standards, through which a composite frequency standard with ultra-low phase noise and low cost can be easily realized.
Keywords :
frequency locked loops; FLL; atomic frequency standards; beat method; composite frequency standard; digital loop; frequency feedback loops; ultra-low phase noise; ultra-narrow bandwidth frequency-locked loop; Atomic clocks; Bandwidth; Frequency locked loops; Frequency measurement; Phase noise; Physics;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2011.1925
