title: A solid-mounted resonator-oscillator-based 4.596 GHz frequency synthesis.
abstract: This paper describes a 4.596 GHz frequency synthesis based on a 2.1 GHz solid mounted resonator (SMR) voltage-controlled oscillator (VCO). The SMR oscillator presents a chip size lower than 2 mm(2), a power consumption of 18.2 mW, and exhibits a phase noise of -89 dBc/Hz and -131 dBc/Hz at 2 kHz and 100 kHz offset frequencies, respectively. The VCO temperature-frequency dependence is measured to be -14 ppm∕°C over a range of -20°C to 60°C. From this source, a low noise frequency synthesizer is developed to generate a 4.596 GHz signal (half of the Cs atom hyperfine transition frequency) with a phase noise of -81 dBc/Hz and -120 dBc/Hz at 2 kHz and 100 kHz from the carrier. The frequency synthesis output is used as a local oscillator in a Cs vapor microcell-based compact atomic clock. Preliminary results are reported and discussed. To the authors knowledge, this is the first development of a SMR-oscillator-based frequency synthesizer for miniature atomic clocks applications.
authors: Institut FEMTO-ST, UMR 6174 CNRS, 32 av. de l'Observatoire, 25044 Besançon Cedex, France. rodolphe.boudot@femto-st.fr
authors: R
authors: R
authors: Boudot
authors: M D
authors: MD
authors: Li
authors: V
authors: V
authors: Giordano
authors: N
authors: N
authors: Rolland
authors: P A
authors: PA
authors: Rolland
authors: P
authors: P
authors: Vincent