波谱学杂志 ›› 2014, Vol. 31 ›› Issue (4): 587-595.doi: 10.11938/cjmr20140413

• 研究论文 • 上一篇    下一篇

一种小型化铷原子钟锁相倍频窄带VCO 设计

陈涛1–3,孙兵锋1,2,阎世栋1,梅刚华1,钟达1*   

  1. 1. 中国科学院武汉物理与数学研究所,中国科学院原子频标重点实验室,湖北 武汉 430071;
    2. 中国科学院大学,北京100049;
    3. 武汉工商学院公共基础部,湖北 武汉 430065
  • 收稿日期:2014-03-17 修回日期:2014-10-29 出版日期:2014-12-05 发布日期:2014-12-05
  • 通讯作者: 钟达 E-mail:zhongda@wipm.ac.cn
  • 作者简介:陈涛(1989-),男,湖北武汉人,硕士研究生,现任武汉工商学院基础课部教师,无线电物理专业. *通讯联系人:钟达,电话:027-87198726,E-mail: zhongda@wipm.ac.cn.

Design of a Narrow-Band Voltage Controlled Oscillator for Phase-Locked Frequency Multiplier in Miniature Rubidium Atomic Clock

CHEN Tao1–3,SUN Bing-feng1,2,YAN Shi-dong1,MEI Gang-hua1,ZHONG Da1*   

  1. 1. CAS. Key laboratory of Atomic Frequency Standards (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Basic Department, Wuhan Technology and Business University, Wuhan 430065, China
  • Received:2014-03-17 Revised:2014-10-29 Online:2014-12-05 Published:2014-12-05
  • Contact: Da ZHONG E-mail:zhongda@wipm.ac.cn
  • About author:*Corresponding author:ZHONG Da, Tel: 027-87198726, E-mail: zhongda@wipm.ac.cn.

摘要:

设计了一款用于小型化铷原子钟锁相倍频器的窄带VCO(压控振荡器)电路.振荡电路采用了稳定性好的克拉泼电路方案.应用仿真软件对该电路进行仿真分析和优化设计.最终设计出的VCO 电路主要性能指标为:输出频率范围为440 MHz~470 MHz,频率调谐灵敏度为18 MHz/V,二次谐波抑制度为-15 dBc,由其构成的锁相倍频器实现了低相噪设计要求,使小型化铷原子钟具备了实现高的频率稳定度潜力.

关键词: 铷原子钟, 窄带VCO, 锁相倍频, 相位噪声

Abstract:

A narrow-band voltage controlled oscillator (VCO) circuit for phase-locked frequency multiplier in rubidium atomic clock was designed. A clapp oscillation circuit scheme was used in the design. The design of the VCO was analyzed and optimized by simulation. A true VCO circuit was constructed and tested. The performance specifications of VCO were as following: frequency covering 440~470 MHz, tuning sensitivity 18 MHz/V and second harmonic suppression -15 dBc. The phase-locked frequency multiplication system was found to have a low phase noise meeting the requirement of the miniature rubidium atomic clocks.

Key words: rubidium atomic clocks, narrow band voltage controlled oscillator, phaselocked frequency multiplication, phase noise

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