Micro atomic frequency standards employing an integrated FBAR-VCO oscillating on the 87RB clock frequency without a phase locked loop

M. Hara, Y. Yano, M. Kajita, H. Nishino, Y. Ibata, M. Toda, S. Hara, A. Kasamatsu, H. Ito, T. Ono, T. Ido

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We applied a 3.5-GHz-band thin film bulk acoustic resonator (FBAR) to a voltage controlled oscillator (VCO), which is designed as a local oscillator of miniaturized atomic frequency standards (AFSs). This frequency reference instead of a bulky quartz resonator may enable an AFS with a chip component size. By using the 3.5-GHz-band FBAR, the clock frequency at the 87Rb transition (fclock/2=3.42 GHz) was directly generated without a phase locked loop (PLL), reducing the cost, size, and power consumption of the RF control unit. Also, MEMS based Rb gas cells were developed, where the cylindrical cavity was 3 mm in both diameter and length. We observed a coherent population trapping (CPT) resonance. By incorporating the FBAR-VCO into the feedback loop of the CPT system, a sustained clock operation was achieved with a frequency instability of 2.1×10-11 at 1 s.

Original languageEnglish
Title of host publication2018 IEEE Micro Electro Mechanical Systems, MEMS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages715-718
Number of pages4
ISBN (Electronic)9781538647820
DOIs
Publication statusPublished - 2018 Apr 24
Event31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018 - Belfast, United Kingdom
Duration: 2018 Jan 212018 Jan 25

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
Volume2018-January
ISSN (Print)1084-6999

Other

Other31st IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2018
Country/TerritoryUnited Kingdom
CityBelfast
Period18/1/2118/1/25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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