| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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An Ultra-Miniature Cell-Type Rb Atomic Clock Based on a Novel Waveguide Cavity |
| BAI Li-Na1,3**, CAO Yuan-Hong2, LIU Lei-Ji2, YANG Lin2, ZHENG Xing-Shi2, ZHOU Wei1,3 |
1Department of Measurement and Instrument, Xidian University, Xi'an 710071
2Technologic Center of Atomic Clock, Spaceon Co. Ltd., Chengdu 611731
3State Key Laboratory of Astronautic Dynamics, Xi'an 710043
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| Cite this article: |
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BAI Li-Na, CAO Yuan-Hong, LIU Lei-Ji et al 2014 Chin. Phys. Lett. 31 098402 |
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Abstract We introduce a novel waveguide cavity for ultra-miniature cell-type Rb atomic clock. In the cavity, a coupling ring shaped to be a semi-circle imports an rf signal from electronics, a screw regulator acts as a medium coupler to transmit the microwave signal into the absorption cell, and both the parts serve as a filter to suppress useless components except 6.8 GHz. Furthermore, the waveguide cavity can be used to design a miniature Rb atomic clock, and spread it to a chip-scale atomic clock. We have completed the design of the smallest cell-type Rb atomic clock in the world based on this waveguide cavity. It has not only a small size but also obviously better key performances than those of other miniature Rb atomic clocks. This ultra-miniature cell-type Rb atomic clock aging is 4×10?13/d, which is obviously slower than that of other miniature Rb atomic clocks.
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| PACS: |
84.40.Az
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(Waveguides, transmission lines, striplines)
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31.15.-p
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(Calculations and mathematical techniques in atomic and molecular physics)
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06.30.Ft
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(Time and frequency)
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[1] Quinn T 2005 Metrologia 42 3
[2] Liu L, Gao T, Deng K, Liu X Y, Chen X Z and Wang Z 2007 Chin. Phys. Lett. 24 1883
[3] Liu G and Gu S H 2010 J. Phys. B 43 035004
[4] S A.3Xm Data Sheet 2011831 http://www.symmetricom.com/ media/files/downloads/productdatasheet/DS%5FSA%2031m%5F0309.pdf
[5] Audoin C and Guinot B 2001 The Measurement of Time (Cambridge: Cambridge University Press) p 211
[6] Dass T, Freed G, Petzinger J et al 2003 The 34th Annual Precise Time and Time Interval (PTTI) Meeting (Vienna, Austria 7–9 August 2003) p 176
[7] Mei et al (U.S. Patent) US622587B1
[8] Schneider W 2012 VHF Commun. 44 67
[9] R Nicole 1956 Coupled-Strip-Transmission-Line Filters Directional Couplers p 7581
[10] Cao Y H, Yang L, Li Q F, Zhao H Q, Lin Q L and Du R C 2011 Frequency Control and the European Frequency and Time Forum (FCS) pp 1–5
[11] Cao T, Green C and Little C 2012 European Frequency and Time Forum (EFTF) (Baltimore USA May 21 2012) p 327
[12] Xiang J Q, Cao Y H and Liu Y J 2009 National Time and Frequency Conference Proceedings (Besancon France April 20 2009) p 1007
[13] Yu J G, Zhou W and Du B Q 2012 Chin. Phys. Lett. 29 070601
[14] Braun A M 2008 The 39th Annual Precise Time and Time Interval (PTTI) Meeting (UK 26–29 November 2008) p 233
[15] SA.45s Data Sheet 2011831 http://www.symmetricom.com/files/downloads/productdatasheet/DS%5FSA.45sCSAC.pdf |
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