Chin. Phys. Lett.  2012, Vol. 29 Issue (7): 070601    DOI: 10.1088/0256-307X/29/7/070601
GENERAL |
A Novel Super-High Resolution Phase Comparison Approach
YU Jian-Guo1**, ZHOU Wei1,2, DU Bao-Qiang1,2, DONG Shao-Feng1, FAN Qiao-Yan1
1Department of Measurement and Instrument, Xidian University, Xi'an 710071
2School of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002
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YU Jian-Guo, ZHOU Wei, DU Bao-Qiang et al  2012 Chin. Phys. Lett. 29 070601
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Abstract

With the improvement of the accuracy of atomic frequency standard and satellite navigation, the high-resolution phase comparison method is necessary. Using the phase synchronous detection principle, a super-high resolution phase comparison method between frequency standards is proposed based on the greatest common factor frequency, phase group processing and a common frequency source and so on. This method is mainly dependent on the stability of the common frequency standard and its frequency. The ±1 count error can be eliminated effectively. Therefore, higher than 1 ps resolution can be easily reached with a simple instrument. Experimental results show higher than 10−15/h precision can be obtained in the long-term frequency standard comparison and the measuring precision can reach 10−17 for several days of comparison.

Received: 14 October 2011      Published: 29 July 2012
PACS:  06.30.Ft (Time and frequency)  
  06.20.Dk (Measurement and error theory)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/29/7/070601       OR      https://cpl.iphy.ac.cn/Y2012/V29/I7/070601
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Articles by authors
YU Jian-Guo
ZHOU Wei
DU Bao-Qiang
DONG Shao-Feng
FAN Qiao-Yan
[1] Zhou H and Zhou W 2006 IEEE Frequency Control Symp. 6 267
[2] Du B Q and Zhou W 2009 Chin. J. Sci. Instrum. 30 967 (in Chinese)
[3] Du B Q, Zhou W, Dong S F and Zhou H N 2009 Chin. Phys. Lett. 26 070602
[4] Kalisz J, Pawlowski M and Pelka R 1987 J. Phys. E: Sci. Instrum. 20 1330
[5] Du B Q, Zhou W and Yu J G 2011 Chin. Phys. Lett. 28 050601
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