基于新颖调谐谐振器的低相噪VCO设计  

Design a low phase noise VCO based on a novel tunable resonator

作　　者：吕俊材 鲍景富[1] LYU Juncai;BAO Jingfu(School of Electronic Engineering,University of Electronic Science and Technology of China,Chengdu Sichuan 611731,China)

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《太赫兹科学与电子信息学报》2018年第2期290-293,共4页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金委员会和中国工程物理研究院联合基金资助项目(U1430102)

摘　　要：介绍了一种采用新颖谐振器的低相位噪声窄带压控振荡器(VCO)的设计方法。该谐振器采用源与负载横向交叉耦合结构,形成一个传输零点,提高了谐振器的Q值。该谐振器通过弱耦合与变容二极管连接,从而实现电压控制滤波器通带中心频率调谐。利用该谐振器设计了一个窄带VCO,并在先进设计系统(ADS)软件里仿真验证。该VCO中心频率6.15 GHz,在调谐电压从0到15 V的范围内调谐带宽60 MHz,相位噪声在整个调谐范围内优于-132 dBc/Hz@1MHz,输出功率为8.4 dBm,功率平坦度±0.1 dBm。A novel low phase noise Voltage Controlled Oscillator(VCO)based on a new tuned resonator is introduced.This resonator adopts cross coupling between the source and load port and can produce a transmission zero so that improve the Q-factor.This resonator realizes the voltage controlled filter by using weak coupling between the resonator and the varactor.Finally the novel resonator is utilized to design a narrow band VCO which is simulated in Advanced Design System(ADS).The simulation results show that the center frequency of this VCO is 6.15 GHz,the tuning band is almost 60 MHz,phase noise is better than-132 dBc/Hz at 1 MHz offset frequency in the whole band,the output power is 8.4 dBm,and the flatness of the output power is±0.1 dBm.

关 键 词：可调谐谐振器 相位噪声 压控振荡器 交叉耦合 

分 类 号：TN752[电子电信—电路与系统]