CMOS毫米波压控振荡器的研究和设计

发布时间：2018-06-19 19:42

本文选题：毫米波压控振荡器 + 宽频带　；参考：《杭州电子科技大学》2017年硕士论文

【摘要】：随着无线通信技术的急速发展,尤其是5G计划在不断的推进,无线通信系统对带宽的要求越来越高,这就使得毫米波频段(30GHz~300GHz)可观的频谱资源愈发的具有吸引力。射频收发系统是无线通信系统中不可或缺的一部分,对它的研究一直是毫米波频段甚至是太赫兹频段的主要内容。压控振荡器(Voltage-controlled Oscillator,VCO)是雷达系统以及射频收发系统中最为关键的一个模块,得到了更加广泛的关注。本文首先阐述了CMOS毫米波压控振荡器的意义,介绍了国内外关于CMOS毫米波频段压控振荡器的研究进展,然后分析了压控振荡器的设计理论、实现方法和毫米波频段VCO的性能要求。最后,基于CMOS工艺进行毫米波VCO的设计。论文工作如下:1.对低相位噪声压控振荡器的设计进行了研究。在ADS仿真环境中,利用开口谐振环结构设计电感,并在Cadence仿真环境中设计中心频率为140GHz的VCO。与传统螺旋电感相比,利用该结构电感设计的压控振荡器的相位噪声改进1.1dBc/Hz。2.对宽频带压控振荡器的设计进行了研究。在ADS仿真环境中,利用人工介电常数的概念并基于数字可控的差分传输线设计了感值可变的片上电感。通过理论分析并结合ADS仿真对数字可控差分传输线中各参数对感值的影响进行分析和验证,并在Cadence仿真环境中利用GF65nm工艺进行宽频带压控振荡器的设计。通过对电路的仿真数据进行分析,实现了频率调谐范围约为6GHz(139.4GHz~145.3GHz)的宽频带压控振荡器。3.基于注入锁定技术对正交压控振荡器展开了研究。基于注入锁定的分频特性,利用两个压控振荡器的二次谐波相互作为注入信号,实现两个振荡器的基波信号相位的正交。同时采用1/4?传输线增加振荡器输出二次谐波的振幅从而增加增加注入能量,提高注入锁定产生正交信号的频率范围。在ADS中仿真优化所需电感,在Cadence仿真环境中利用GF65nm工艺设计电路,仿真得出该电路的正交输出频率范围为141.2GHz~144.8GHz,相位噪声为-109.69dBc/Hz@10MHz,比单个压控振荡器的相位噪声改进1.75dBc/Hz。
[Abstract]:With the rapid development of wireless communication technology, especially the 5G plan, the bandwidth requirement of wireless communication system is becoming higher and higher, which makes the considerable spectrum resource of 30GHz / 300GHz in millimeter wave band more attractive. RF transceiver system is an indispensable part of wireless communication system. The research of RF transceiver is always the main content of millimeter wave band and even terahertz band. Voltage-controlled Oscillator VCO (VCO) is one of the most important modules in radar system and RF transceiver system. In this paper, the significance of CMOS millimeter-wave voltage-controlled oscillator is introduced, and the research progress of CMOS millimeter-wave VCO at home and abroad is introduced, and then the design theory of VCO is analyzed. Implementation method and performance requirements of millimeter wave band VCO. Finally, the design of millimeter wave VCO based on CMOS process is carried out. The work of the thesis is as follows: 1. The design of low phase noise voltage controlled oscillator is studied. In ads simulation environment, the open resonant ring structure is used to design the inductor, and the VCO with the center frequency of 140 GHz is designed in Cadence simulation environment. Compared with the traditional spiral inductor, the phase noise of the VCO designed by the inductor is improved by 1.1 dBc / Hz.2. The design of a wide band voltage controlled oscillator is studied. Based on the concept of artificial dielectric constant and digital controllable differential transmission line, an inductance with variable inductance is designed in ads simulation environment. Based on the theoretical analysis and the ads simulation, the influence of the parameters on the perceptual value in the digital controlled differential transmission line is analyzed and verified, and the broadband VCO is designed by using GF65nm process in Cadence simulation environment. By analyzing the simulation data of the circuit, a broadband voltage-controlled oscillator with a tunable frequency range of about 6GHz / 139.4GHz / 145.3GHz is realized. The orthogonal voltage controlled oscillator (OVCO) is studied based on injection locking technique. Based on the frequency-dividing characteristic of injection locking, the second harmonic of two voltage-controlled oscillators is used as the injection signal to realize the quadrature of the fundamental signal phase of the two oscillators. 1 / 4 at the same time? The transmission line increases the amplitude of the second harmonic output of the oscillator, thereby increasing the injection energy and increasing the frequency range of the quadrature signal generated by the injection lock. Using GF65nm technology to design circuit in Cadence simulation environment, the quadrature output frequency range of this circuit is 141.2GHz / 144.8 GHz, phase noise is -109.69dBc / Hz / Hz / Hzr @ 10MHz, which is 1.75dBc / Hz. Hz. which is better than the phase noise of a single voltage-controlled oscillator.
【学位授予单位】：杭州电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN752

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