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题名	频率标准及频率信号测量
作者	张娜
学位类别	硕士
答辩日期	2009-06-09
授予单位	中国科学院上海天文台
授予地点	上海天文台
导师	黄佩诚
关键词	时间频率 原子钟 晶体振荡器 频率稳定度 相位噪声 阿伦方差
其他题名	Frequency standards and measurement of frequency signal
中文摘要	The high-precision of measurement of time frequency is the base of many cutting-edge sciences related to the national defense. The appearance of modern quantum frequency standard and development of electronic technology greatly enhanced the stability and accuracy of time frequency measurement, its accuracy and test technical lead to other quantum measurement. Atom clock is a kind of high-precision instrument which is widely used for time measurement and communication service. The high-precision time frequency measurement based on cesium atom clock is widely used in national defense, scientific research and various fields of the national economy. Such as the measurement science，modern communications，navigation and positioning and basic scientific research, etc. So the research and experiment on noise charactering method are getting more and more important in practical application. In order to develop China's own navigation system, a very high requirements for the application of time frequency system is popped. In order to better achieve the goal of the project. A clear understanding of time frequency system is needed as while as the study of engineering systems. Based on ground-based time-frequency system of the autonomous navigation systems, this paper gives a collation and analysis of the theoretical and experimental approach for time frequency system. After introducing the importance of time frequency, this paper gives a specific description of atom clock and crystal oscillator which are keys in the time and frequency measurement, then a detailed description are given about Time frequency system and type of atomic clock-related noise，methods of noise measurement and its scope of application，followed by an introduction of a series of important concepts including frequency stability, phase noise and Allan variance. This paper ends with a summary of the frequency characteristics of measuring instruments and application field after detailed introduction of widely used atom clocks and crystal oscillator.
英文摘要	时间频率系统的高精度测量是关系国防建设等众多前沿科学的基础, 现代量子频标的出现和电子技术的进步,极大地提高了时间频率计量测试的稳定度和准确度,其精度和测试技术遥遥领先于其它量子的计量测试水平。 原子钟是目前世界上普遍运用的用于计量时间和通讯测量方面的高精度仪器，以铯原子钟为基础的高精度的时间频率计量更是广泛应用于国防建设、科学研究和国民经济各个领域，如计量科学、现代通讯、导航定位及基础科学研究等。因此对其输出信号的研究在实际应用中变得愈加重要。 为了发展我国自主导航系统，对时间频率的应用提出了极高的要求，在研究工程系统的同时，必须对时间频率方面理论进行有清晰的了解，才能更好地实现工程目标。本文以自主导航系统中的地面时间频率系统为基础，对时间频率领域相关的理论和试验方法进行了整理和分析。 本文在对时间频率及其重要性进行描述之后，引入了关于原子钟及其类别的介绍，之后对时间频率和原子钟相关的噪声类型，噪声测量方法及其运用范围进行了描述。并论述了频率稳定度，相位噪声，阿伦方差等一系列重要概念。 在对运用较广泛的原子钟和晶体振荡器进行了详尽的介绍之后，本文结尾对测量仪器的频率特征和运用领域做了总结。
语种	中文
公开日期	2011-07-01
页码	69
内容类型	学位论文
源URL	[http://119.78.226.72//handle/331011/14732]
专题	上海天文台_中国科学院上海天文台学位论文
推荐引用方式 GB/T 7714	张娜. 频率标准及频率信号测量[D]. 上海天文台. 中国科学院上海天文台. 2009.

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