A microwave exciter for Cs frequency standards based on a sapphire-loaded cavity oscillator.
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 x 10(-15) at tau = 1 s.
Koga
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National Research Laboratory of Metrology, Tsukuba Ibaraki 305-8563, Japan. koga@nrlm.go.jp
McNeilage
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Searls
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JH
Ohshima
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