Intermittent rubidum atomic clock microwave frequency synthesizer

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...

AI Technical Summary

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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