Frequency synthesis chain for the atomic fountain primary frequencystandard

摘要

The frequency noise of the local oscillator may degrade thenlong-term stability of high-stability frequency standard; a simplenevaluation of this effect is performed to optimize the design of ansynthesizer to be used in Cs atomic primary frequency standard. Andescription of the microwave synthesis chain realized, which is suitablenas a local oscillator for Cs atomic primary frequency standard, isnreported. Phase noise spectra in the key points of the chain are alsonreported. The measured fractional frequency stability of the chain isnbetter than 10-17 at one day