【摘要】 本文报告了一种守时用小型氢原子钟的设计和研制。该钟应用了一个精密的电容式谐振腔，由于其体积很小，从而使钟的整体体积和重量较通常的氢钟大大减小。腔的Ｑ值采用正反馈获得增益，从而能维持氢脉泽振荡并改善信号的信噪比。由于采用了腔频自动调谐系统，钟的长期稳定度可与通常的氢钟相比。更多还原

【Abstract】 A miniature hydrogen maser standard for time-keeping has been developed successfully at Shanghai Observatory. The maser employs a compact cavity design, resulting in significant size and weight reductions compared with conventional hydrogen maser. The Q value of the compact cavity can be enhanced effectively by using a positive feedback into the cavity. The long-term stability of the maser standard can be improved by a cavity auto-tuner system. This paper describes the design and development of the new maser, as well as the performance data.更多还原