基于高Q空气谐振腔Ku波段点频源研制
发布时间：2019-03-08 07:54
【摘要】：微波频率源是雷达、无线通信等电子系统中的关键部件。随着电子技术的不断进步和发展,电子系统对于微波频率源的指标要求也越来越高,尤其是相位噪声指标。无论用何种频率合成技术研制的微波频率源,其相位噪声指标与其参考基准源的相位噪声密切相关,所以研制低相位噪声点频源具有重要的意义。本文以研制低相位噪声点频源为主要目的,进行了以下几个方面的工作:1.首先详细阐述了振荡器的起振条件和振荡平衡条件,然后介绍了相位噪声的基本概念和相位噪声的Leeson模型,以及振荡器相位噪声的Leeson模型表达式,并在此基础上给出了改善振荡器相位噪声的几点建议。2.介绍了直接反馈点频源、稳定本地点频源、改进的直接反馈点频源、改进的稳定本地点频源和采用干涉信号处理技术的点频源等常见低相位噪声点频源的基本原理,以及这几种点频源的优缺点;然后在此基础上介绍了基于高Q空气谐振腔Ku波段点频源的方案,以及该方案中锁频环技术的基本原理。3.基于圆柱空气谐振器的基本理论,仿真并设计了工作在023TE模式,谐振频率为12.8GHz,输入口临界耦合、输出口弱耦合的耦合可调谐振频率可调高Q圆柱空气谐振腔。4.依照基于高Q空气谐振腔Ku波段点频源方案,完成了本课题的点频源总体方案设计;然后对点频源的所有组成器件包括压控振荡器、功率放大器、定向耦合器、3dB电桥、低噪声放大器、环路滤波器、加法器等分别进行了设计和仿真。5.完成了对点频源的所有组成器件的调试和测试,使它们都满足点频源的设计要求;然后对点频源系统进行了搭建、调试、测试,完成了基于高Q空气谐振腔Ku波段点频源的研制。经测试,该点频源的输出信号频率为12.66188GHz,功率为+9d Bm,相位噪声性能为-64.44dBc/Hz@1kHz、-93.50dBc/Hz@10kHz、-97.10dBc/Hz@100kHz、-126.33dBc/Hz@1MHz。
[Abstract]:Microwave frequency source is the key component in the electronic system such as radar, wireless communication and so on. With the continuous progress and development of electronic technology, the requirement of microwave frequency source in electronic system is higher and higher, especially the phase noise index. No matter which frequency synthesizer is used, the phase noise index of microwave frequency source is closely related to the phase noise of its reference source. Therefore, it is of great significance to develop a low phase noise point frequency source. The main purpose of this paper is to develop a low phase noise point frequency source, and the following works have been carried out: 1. The starting condition and balance condition of oscillator are described in detail. Then the basic concept of phase noise, the Leeson model of phase noise and the expression of Leeson model of phase noise of oscillator are introduced. On this basis, some suggestions for improving the phase noise of oscillator are given. 2. This paper introduces the basic principles of common low phase noise point frequency sources such as direct feedback point frequency source, stabilized local site frequency source, improved direct feedback point frequency source, improved local site frequency source and point frequency source using interference signal processing technology, etc. And the advantages and disadvantages of these point frequency sources; Then, the scheme based on the high Q air resonant cavity Ku band point frequency source is introduced, and the basic principle of frequency locking loop technology in this scheme is introduced. 3. Based on the basic theory of cylindrical air resonator, a cylindrical air resonator working in 023TE mode is simulated and designed. The resonant frequency is 12.8GHz, the critical coupling of input and outlet is critical, and the coupling adjustable resonant frequency of output and outlet is adjustable to high Q cylindrical air resonator. According to the point frequency source scheme based on the high Q air resonant cavity Ku region, the overall design of the point frequency source is completed. Then all the components of the point frequency source, including voltage controlled oscillator, power amplifier, directional coupler, 3dB bridge, low noise amplifier, loop filter, adder and so on, are designed and simulated. 5. The debugging and testing of all the components of the point frequency source are completed to make them meet the requirements of the design of the point frequency source. Then the point frequency source system is built, debugged and tested, and the development of the point frequency source based on the high Q air resonant cavity Ku region is completed. The output frequency of the point frequency source is 12.66188GHz, and the phase noise performance of 9d Bm, is-64.44dBC / Hz / 1kHz, 93.50dBC / Hz / 10kHz, 97.10dBC / Hz / 100kHz, 126.33dBC / Hz / 1MHz, 126.33dBC / Hz / 1MHz, 10kHz, 126.33dBC / Hz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBC / Hz, 10kHz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBcxHz.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN74
本文编号：2436592
[Abstract]:Microwave frequency source is the key component in the electronic system such as radar, wireless communication and so on. With the continuous progress and development of electronic technology, the requirement of microwave frequency source in electronic system is higher and higher, especially the phase noise index. No matter which frequency synthesizer is used, the phase noise index of microwave frequency source is closely related to the phase noise of its reference source. Therefore, it is of great significance to develop a low phase noise point frequency source. The main purpose of this paper is to develop a low phase noise point frequency source, and the following works have been carried out: 1. The starting condition and balance condition of oscillator are described in detail. Then the basic concept of phase noise, the Leeson model of phase noise and the expression of Leeson model of phase noise of oscillator are introduced. On this basis, some suggestions for improving the phase noise of oscillator are given. 2. This paper introduces the basic principles of common low phase noise point frequency sources such as direct feedback point frequency source, stabilized local site frequency source, improved direct feedback point frequency source, improved local site frequency source and point frequency source using interference signal processing technology, etc. And the advantages and disadvantages of these point frequency sources; Then, the scheme based on the high Q air resonant cavity Ku band point frequency source is introduced, and the basic principle of frequency locking loop technology in this scheme is introduced. 3. Based on the basic theory of cylindrical air resonator, a cylindrical air resonator working in 023TE mode is simulated and designed. The resonant frequency is 12.8GHz, the critical coupling of input and outlet is critical, and the coupling adjustable resonant frequency of output and outlet is adjustable to high Q cylindrical air resonator. According to the point frequency source scheme based on the high Q air resonant cavity Ku region, the overall design of the point frequency source is completed. Then all the components of the point frequency source, including voltage controlled oscillator, power amplifier, directional coupler, 3dB bridge, low noise amplifier, loop filter, adder and so on, are designed and simulated. 5. The debugging and testing of all the components of the point frequency source are completed to make them meet the requirements of the design of the point frequency source. Then the point frequency source system is built, debugged and tested, and the development of the point frequency source based on the high Q air resonant cavity Ku region is completed. The output frequency of the point frequency source is 12.66188GHz, and the phase noise performance of 9d Bm, is-64.44dBC / Hz / 1kHz, 93.50dBC / Hz / 10kHz, 97.10dBC / Hz / 100kHz, 126.33dBC / Hz / 1MHz, 126.33dBC / Hz / 1MHz, 10kHz, 126.33dBC / Hz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBC / Hz, 10kHz, 126.33dBC / Hz, 10kHz, 10kHz, 126.33dBcxHz.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN74
【参考文献】
相关硕士学位论文 前2条
1 伍昆伦;高性能点频微波振荡器关键技术研究[D];电子科技大学;2012年
2 骆明伟;低相噪锁相介质振荡器的研制[D];电子科技大学;2007年
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