| NI立足测试测量，助力5G |
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| 引用本文： | 贾静. NI立足测试测量，助力5G[J]. 国外电子测量技术, 2015, 34(4): 16-18 |
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| 作者姓名： | 贾静 |
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| 作者单位： | 《国外电子测量技术》 |
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| 摘 要： | The SI “second” is realized by caesium primary frequency standards (PFSs) using laser cooled atoms in a fountain configuration. Four sub systems and operation procedure of the NTSC-F1 primary frequency standard are introduced in the paper. The frequency stability of NTSC-F1 is 3.0×10-13/τ-1/2 compared to hydrogen maser. Four terms of frequency shift and uncertainty including second order Zeeman frequency shift, cold collision shift, gravity shift and blackbody shift are evaluated. The improvement of NTSC-F1 is introduced.
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Progress of the NTSC-F1 primary frequency standard |
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| RUAN Jun,WANG Xinliang,LIU dandan,GUAN Yong,ZHANG Hui,CHEN Jiang,LIN Rui,YU Fengxiang,SHI Junru,ZHANG Shougang. Progress of the NTSC-F1 primary frequency standard[J]. Foreign Electronic Measurement Technology, 2015, 34(4): 16-18 |
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| Authors: | RUAN Jun WANG Xinliang LIU dandan GUAN Yong ZHANG Hui CHEN Jiang LIN Rui YU Fengxiang SHI Junru ZHANG Shougang |
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| Abstract: | |
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| Keywords: | Primary frequency standard frequency stability frequency uncertainty |
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