Intermittent rubidum atomic clock microwave frequency synthesizer

A rubidium atomic clock and microwave frequency technology, which is applied in the field of intermittent rubidium atomic clock microwave frequency synthesizer, can solve the problems of large phase noise and limiting the performance of atomic clocks, and achieve the effects of improving phase noise, avoiding interference, and improving resolution

Active Publication Date: 2012-03-28
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0004] At present, the cold atomic rubidium clock with the highest precision does not have a dedicated low-noise microwave frequency synthesizer, and commercial high-frequency signal generators are mostly used, but the phase noise of this signal generator is relatively large, which greatly limits the performance of the atomic clock

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  • Intermittent rubidum atomic clock microwave frequency synthesizer
  • Intermittent rubidum atomic clock microwave frequency synthesizer
  • Intermittent rubidum atomic clock microwave frequency synthesizer

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] figure 1 It is the overall block diagram of the microwave frequency synthesizer of the present invention. As can be seen from the figure, the intermittent rubidium atomic clock microwave frequency synthesizer of the present invention is composed of the first phase-locked loop 11a, the second phase-locked loop 11b, the third 2-way power divider 5c, the 2-way frequency multiplier 1b, the down-conversion mixer Frequency converter 2d and numerically controlled attenuator 7b form, and its connection relation is as follows:

[0028] Described first phase-locked loop 11a comprises the 20 frequency multiplier 1a that is connected with input end, and the output end of this 20 frequency multiplier 1a is connected with the radio frequency end of the first mixer 2a, and this first mixer 2a The output end is connected with the input end of the first loop fi...

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Abstract

An intermittent rubidum atomic clock microwave frequency synthesizer comprises a first phase-locked loop, a second phase-locked loop, a third two-path power divider, two frequency multipliers, a lower frequency conversion mixer, and a digitally controlled attenuator. The frequency synthesizer provided by the invention has low noise, high frequency resolution factor and power resolution factor, and reliable and simple structure, and is also applicable to other intermittent rubidium atomic clocks.

Description

technical field [0001] The invention relates to atomic frequency standard and microwave technology, and more specifically relates to an intermittent rubidium atomic clock microwave frequency synthesizer for intermittent rubidium atomic clocks. Background technique [0002] It is one of the basic physical quantities of time (or frequency), and it is also the basic physical quantity with the highest measurement accuracy at present. We know that the measurement of any physical quantity must be measured with different scales, and time is also measured with scales. Microwave atomic clocks are currently the most accurate time-frequency standards. Its working principle is to use the microwave signal generated by the local oscillator to probe the transition of the atomic ground state energy level, and feed back and lock the local oscillator to obtain a high stability and high precision frequency signal. There are two main types of atomic media used in microwave atomic clocks: cesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/26
Inventor 李唐李琳史春艳魏荣王育竹
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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