A Novel Super-High Resolution Phase Comparison Approach

Yu, Jianhua; Zhou, Wei; Du, B. X.; Dong, Shaofeng; Fan, Qiao-Yan

doi:10.1088/0256-307x/29/7/070601

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…We have tested the specification parameters of the clock by a new method. [13] The Allan deviation of stability is 3 × 10 −11 /s; the temperature-frequency stability is 4 × 10 −11 in the range of −30-50 ∘ C (after compensation); the aging is 4 × 10 −13 /d. The technical specifications of this ultra-miniature cell-type Rb atomic clock are significantly better than those of the current CPT miniature Rb atomic clock.…”

Section: Electronicsmentioning

confidence: 96%

An Ultra-Miniature Cell-Type Rb Atomic Clock Based on a Novel Waveguide Cavity

Bai¹,

Cao²,

Liu³

et al. 2014

Chinese Phys. Lett.

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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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Section: Electronicsmentioning

confidence: 96%

An Ultra-Miniature Cell-Type Rb Atomic Clock Based on a Novel Waveguide Cavity

Bai¹,

Cao²,

Liu³

et al. 2014

Chinese Phys. Lett.

Self Cite

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“…Therefore, when   makes cycle changes, the phase output also can produce periodic changes [9]. According to the plus or minus sign of the sine and cosine of   , we can calculate it accurately.…”

Section: Principlementioning

confidence: 99%

A Digital Implementation of Delay Relevant Frequency Measurement Technology Based on CORDIC Algorithm

Qin¹,

Pan²,

Zhang³

2015

Proceedings of the 2015 International Conference on Education, Management, Information and Medicine

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Abstract. As one of the key technologies of radar electronic warfare systems, Digital Instantaneous Frequency Measurement (DIFM) technology need to measure signals intercepted quickly. The traditional method of instantaneous frequency measurement is to translate the frequency information into phase information to complete the measurement of the frequency. This paper presents a modified phase measurement method which uses CORDIC algorithm, which is suitable for implementation in FPGA for avoiding using the multipliers. On this basis, the frequency of the signal can be calculated, using MATLAB simulation tool to test its performance, and finally, this method is implemented in the FPGA simulation. The simulation results show that this method has high accuracy, good benefits instantaneous frequency measurement for single-frequency signal, suitable for modern electronic warfare digital receiver digital instantaneous frequency measurement needs.

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“…where f 1 and f 2 are the frequencies of two periodic signals, A and B are two relatively prime positive integers, f maxc is the greatest common factor of f 1 and f 2 , [3] T minc is the least common multiple period which can be calculated as follows:…”

Section: Regular Phenomenon Between Periodic Signalsmentioning

confidence: 99%

Research and application of regular phenomenon between periodic signals

Ye¹,

Xuan²,

Gu³

et al. 2014

Chinese Phys. B

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The phase change between periodic signals is regular. Research on the regular phenomenon between periodic signals is helpful to improve the precision of some measurements and develop some new measurement methods. So it is necessary to analyze the characteristics of the greatest common factor frequency and the least common multiple period universally existing in periodic signals. The regulation of the quantitative phase shift resolution between periodic signals is presented. The cause of difference in phase characteristics between periodic signals is explained well. In this paper we propose different application prospects based on the regular phenomenon between periodic signals, with focusing on the methods for high precision frequency measurement and transient stability measurement. The experimental results are satisfactory.

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A Novel Super-High Resolution Phase Comparison Approach

Cited by 8 publications

References 4 publications

An Ultra-Miniature Cell-Type Rb Atomic Clock Based on a Novel Waveguide Cavity

An Ultra-Miniature Cell-Type Rb Atomic Clock Based on a Novel Waveguide Cavity

A Digital Implementation of Delay Relevant Frequency Measurement Technology Based on CORDIC Algorithm

Research and application of regular phenomenon between periodic signals

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