Title :
A microwave exciter for Cs frequency standards based on a sapphire-loaded cavity oscillator
Author :
Koga, Yasuki ; McNeilage, C. ; Searls, Jesse H. ; Ohshima, Shin-Ichi
Author_Institution :
Nat. Res. Lab. of Metrol., Ibaraki, Japan
Abstract :
A low noise and highly stable microwave exciter system has been built for Cs atomic frequency standards using a tunable sapphire-loaded cavity oscillator (SLCO), which works at room temperature. This paper discusses the successful implementation of a control system for locking the SLCO to a long-term reference signal and reports an upper limit of the achieved frequency tracking error 6/spl times/10/sup -15/ at /spl tau/=1 s.
Keywords :
atomic clocks; caesium; cavity resonators; frequency stability; frequency standards; Cs; SLCO; achieved frequency tracking error; atomic frequency standards; long-term reference signal; microwave exciter; tunable sapphire-loaded cavity oscillator; Australia; Control systems; Error correction; Frequency; Microwave oscillators; Microwave theory and techniques; Phase noise; Stability; Tuning; Voltage-controlled oscillators;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
