氢脉泽调制技术和研究  

The Technology and Research of Hydrogen Maser Modulation

作　　者：王国瑞 杜燕 李锡瑞[1] Wang Guorui;Du Yan;Li Xirui(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Lniversity of Chinese Academy of Sciences,Beijing 100049,China;Beijing Satellite Navigation Center,Beijing 100094,China)

机构地区：[1]中国科学院上海天文台,上海200030 [2]中国科学院大学,北京100049 [3]北京卫星导航中心,北京100094

出　　处：《天文研究与技术》2018年第4期473-478,共6页Astronomical Research & Technology

基　　金：国家自然科学基金(U1731130)资助

摘　　要：对于氢原子钟,由于微波谐振腔的腔牵引效应以及外部环境温度的变化,影响谐振腔的振荡频率,导致氢原子钟长期频率稳定度降低。为了修正这种情况,使用腔自动调谐方式实现谐振腔的频率稳定在工作频率上。目前国内外主要采用的腔自动调谐技术包括3种:外部探测信号调谐方式、微波腔频率开关调谐方式和Qa调制方式。对外部探测信号调谐方式和微波腔频率开关调谐方式进行分析,并在上海天文台SOHM-4型外部探测信号调谐方式的基础上进一步探索微波腔频率开关调谐方式。基于数字信号处理器进行电路设计与程序开发,最终在SOHM-4型氢原子钟上实现腔自动调谐。For hydrogen atomic clock, the oscillation trequeney of the cavity will be affected due to the cavity pulling effect of the microwave cavity and the temperature change of the external environment. This affection results in the decrease of the long-term stability of the hydrogen atomic clock. In order to correct this situation, we use cavity auto-tuning methods to stabilize the cavity frequency at service frequency. At present, main technology of auto-tuning of cavity consists of three kinds： external detection signal tuning mode, microwave cavity frequency switch tuning mode and Qa modulation mode. In this paper, we analyze the tuning mode of external detection signal and microwave cavity frequency switch. In addition, we make further exploration of the microwave cavity frequency switch tuning method based on external detection signal tuning mode of Shanghai Astronomical Observatory SOHM-4 hydrogen atomic clock. We make circuit design and program development on digital signal processor. Consequently, cavity auto-tuning method is implemented on SOHM-4 hydrogen atomic clock.

关 键 词：腔自动调谐 氢原子钟 外部探测信号调谐 微波腔频率开关调谐 

分 类 号：TB939[一般工业技术—计量学]