摘要
被动型氢原子钟在具有较好中长期频率稳定度和频率漂移率的同时,体积和重量较小,可作为高精度频率标准应用于卫星导航、频率计量等领域。下一代卫星导航系统的重要特点是高密度高集成度,对包含被动型氢原子钟在内的卫星负载载荷提出了更高要求。为此,降低体积重量的同时进一步提高性能指标是被动型氢原子钟的重要发展方向。经过长期理论探索和实验验证,在小型化星载氢原子钟研制方面取得了较好进展。通过小型化腔泡系统、小型化吸附泵、高均匀度C场和高性能磁屏蔽系统的设计,以及电路部分的紧凑优化,研制了小型化星载被动型氢原子钟工程样机。在压缩重量至13.5 kg以内的同时,频率稳定度提升至8×10-13t-1/2的水平,可满足当前卫星导航系统的时频信号需求,也可更好地服务下一代北斗卫星导航系统。
Passive hydrogen maser has excellent middle-to-long-term frequency stability and frequency drift rate,meanwhile,features light weight and small volume.It can be applied as high-precision frequency standard in the fields of satellite navigation,frequency calibration and so on.The important features of the next satellite navigation system are high density and high integration,which places higher requirements on the satellite payloads including space passive hydrogen maser.For this reason,an important development direction of space passive hydrogen maser is to further improve the performance indexes,while reducing the volume and weight.After long-term theoretical exploration and experiment verification,we have achieved good progress in the development of mini space passive hydrogen maser.Through the design of miniaturized cavity-bulb assembly,miniaturized getter pump,ultra-homogeneous C field,high-performance magnetic shielding system and the compact optimization of the electric package,an engineering prototype of the miniaturized space passive hydrogen maser was developed.The frequency stability of the prototype is improved to the level of 8×10-13 t-1/2,while its weight is compressed to within 13.5 kg,which meets the performance requirement of the time-frequency signal of current satellite navigation system and can also serve the next generation Beidou satellite navigation system.
作者
潘志兵
谢勇辉
帅涛
陈鹏飞
林传富
Pan Zhibing;Xie Yonghui;Shuai Tao;Chen Pengfei;Lin Chuanfu(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第3期105-112,共8页
Chinese Journal of Scientific Instrument
基金
中国科学院国防科技创新重点部署项目(Y883051)资助
关键词
小型化星载被动型氢原子钟
微波腔储存泡系统
真空吸附泵
高均匀度磁场
磁屏蔽系统
频率稳定度
mini space passive hydrogen maser
microwave cavity-storage bulb assembly
vacuum getter pump
ultra-homogeneous magnetic field
magnetic shielding system
frequency stability
