Ultralow phase noise Microwave Oscillators and Atomic Clocks

参考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、抖动和稳定性通常会设定最终的性能极限。高性能振荡器在通信、控制、雷达和导航系统以及原子钟、光钟、加速器和甚长基干涉仪(VLBI)系统中用作飞轮振荡器，具有很低的相位噪声。本研究的目的是开发新型的超低相位噪声微波振荡器。最初，这将集中在工作在10到16 GHz左右的振荡器上。主要目标将是开发相位噪声小于-180dBc的振荡器，在10 kHz偏移时，噪声下限接近-200dBc(在10 GHz)。振荡器需要开发新型的超低残余相位噪声中等功率放大器(200 mW-5W)，闪烁噪声角低于1 kHz，以及使用Qs在200,000左右和以上的分布式布拉格谐振器的超高Q谐振器。将发展窄带电子调谐和中频带航向调谐。以后的目标将是开发工作在1到10 GHz范围内的振荡器。这些振荡器将用于原子钟，以提高短期和长期频率稳定度。参与约克公司这项研究工作的公司和研究机构包括：Keysight、Teledyne-e2v、Leonardo、Daresbury研究实验室和NPL。

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 microwave oscillators. Initially this will concentrate on oscillators operating around 10 to 16GHz. Key aims will be to develop oscillators with phase noise less than -180dBc at 10kHz offset and noise floors approaching -200dBc (at 10GHz). The oscillators require the development of new ultralow residual phase noise medium power amplifiers (200mW - 5W) with flicker noise corners below 1kHz and ultrahigh Q resonators using distributed Bragg resonators with Qs around and above 200,000. Narrowband electronic tuning and medium bandwith course tuning will be developed. Later aims will be to develop oscillators operating in the 1 to 10GHz range. 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.