权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Ultralow phase noise Crystal Oscillators and Atomic Clocks

超低相位噪声晶体振荡器和原子钟

基本信息

批准号：
2276627
负责人：
金额：
--
依托单位：
University of York
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2276627
关键词：
Ultralow phase noise Crystal Oscillators

项目摘要

Reference oscillators and clocks are essential elements in almost all electronic systems and consumer and professional products as the phase noise, jitter and stability of these oscillators usually sets the ultimate performance limit. High performance oscillators, exhibiting low phase noise, are required in communications, control, RADAR & navigation systems & also as flywheel oscillators for atomic clocks, optical clocks, accelerator & Very Long Base Interferometry (VLBI) systems. The aim of this research is to develop new ultralow phase noise compact crystal oscillators with improved short and long term stability with phase noise (at 100 MHz) significantly below -140dBc at 100 Hz offset, low noise floors and for 5 and 10MHz oscillators phase noise below -130dBc at 1Hz (5MHz) and -123dBc at 1Hz (10MHz) and ADEV (5 and 10MHz) below 10-13 from 0.1 sec to many hundreds of seconds. The aim is to develop new amplifiers which offer low noise figure, ultralow residual flicker noise, accurate limiting and control of resonator power and excellent temperature stability. An additional key feature is to improve the longer-term frequency stability by developing new highly stable temperature control loops with more accurate control of heat flow and accurate setting of the turnover temperature of the crystal resonator. Low phase noise electronic frequency tuning will be investigated.These oscillators will then be used in atomic clocks to improve both the short and long term frequency stability.Companies and research organization involved with this research work at York include: Keysight, Teledyne-e2V, Leonardo, Daresbury Research Laboratories and NPL.

基准振荡器和时钟是几乎所有电子系统以及消费和专业产品中的基本元件，因为这些振荡器的相位噪声、抖动和稳定性通常决定了最终的性能极限。具有低相位噪声的高性能振荡器在通信、控制、雷达和导航系统中是必需的，也可用作原子钟、光学钟、加速器和甚长基线干涉测量（VLBI）系统的飞轮振荡器。本研究的目的是开发新的超低相位噪声紧凑型晶体振荡器，具有改善的短期和长期稳定性与相位噪声（100 MHz时）在100 Hz偏移时显著低于-140 dBc，低本底噪声，对于5和10 MHz振荡器，相位噪声在1 Hz（5 MHz）时低于-130 dBc，在1 Hz（10 MHz）时低于-123 dBc，ADEV（5和10 MHz）低于10-13，从0.1秒到数百秒。我们的目标是开发新的放大器，提供低噪声系数，超低残留闪烁噪声，精确限制和控制谐振器功率和出色的温度稳定性。另一个关键特征是通过开发新的高度稳定的温度控制回路来提高长期频率稳定性，该温度控制回路具有更精确的热流控制和晶体谐振器的翻转温度的精确设置。约克大学的研究机构包括：Keysight，Teledyne-e2 V，列奥纳多，达雷斯伯里研究实验室和NPL。