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Link control method of atomic clock frequency signal based on phase group processing

A technology of frequency signals and control methods, applied in the direction of automatic power control, electrical components, etc., can solve the problems of increased noise and decreased certain indicators.

Active Publication Date: 2016-04-13
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide an atomic clock frequency signal link control method based on phase group processing, which aims to solve the problems of noise increase and certain index decline caused by complex frequency conversion in the prior art

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  • Link control method of atomic clock frequency signal based on phase group processing
  • Link control method of atomic clock frequency signal based on phase group processing

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Embodiment Construction

[0024] The present invention is achieved in this way, a method for linking control of atomic clock frequency signals based on phase group processing is completed in two closed-loop control, as figure 1 Shown:

[0025] The first path is the inner loop closed-loop control, which is used to generate the 9192631770Hz excitation signal in the cesium atomic clock and make the 14.591479MHz crystal oscillator output a stable signal;

[0026] The second way is the outer loop closed-loop control, which is used to realize the final high-precision 10MHz oscillator signal output.

[0027] Further, the implementation method of the first inner-loop closed-loop control is as follows:

[0028] After the output signal of the 14.591479MHz voltage-controlled crystal oscillator (14.591479MHzVCOCXO) is multiplied by 630 times and phase modulated, the excitation signal of the specific energy level transition frequency of cesium atoms is obtained, that is, the excitation signal of 9192631770Hz;

[...

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Abstract

The invention discloses a frequency signal link control method of an atomic clock based on phase group treatment. The method comprises the steps of: internal closed-loop control: generating a 9192631770Hz excitation signal in a cesium atomic clock, and allowing a crystal oscillator to output a stable and accurate signal, and external closed-loop control: performing group phase synchronization and continuous treatment to realize final high-precision 10MHz oscillator signal output with frequency dividing output of a 10MHz signal and a signal of 14.591479MHz high stability oscillator. The control method has a good accuracy index; and furthermore, the short-term stability and the phase noise index of a frequency scale output signal are the high indexes of the 10MHz high stability crystal oscillator completely.

Description

technical field [0001] The invention belongs to the technical field of frequency signal linking, in particular to an atomic clock frequency signal linking control method based on phase group processing. Background technique [0002] The main research of frequency link is to realize the accurate and stable transmission of phase or frequency between frequency signals with great differences. precise link between. Such frequency linking has already been implemented in atomic clock performance improvements. The system structure of the clock can be improved and its performance index can be improved through the frequency link method of generalized phase processing. At present, whether it is an active atomic clock or a passive atomic clock, it is processed by frequency normalization on the basis of frequency processing. [0003] The complex frequency conversion in the prior art leads to the increase of noise, which cannot not only keep the high stability index of the atomic clock...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/07
Inventor 周渭苗苗李智奇宣宗强于建国张雪萍
Owner XIDIAN UNIV
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