Abstract
Features of direct digital synthesis applications in quantum frequency standard on the atoms of cesium are considered. A new design of a frequency synthesizer based on direct digital synthesis method and magnetic field stabilization system are presented. Experimental research of frequency synthesizer showed improvement parameters of a microwave excitation signal, such as step frequency tuning, time frequency tuning, range of generating frequencies and spectral characteristics. Magnetic field stabilization system eliminates one of the most important perturbing factors affecting on long-term frequency stability. Experimental research of metrological characteristic of quantum frequency standard showed improvement long-term frequency stability by 15%.
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