11.8GHz低相噪频率源的设计  

Design of 11.8 GHz low phase noise frequency synthesizer

作　　者：綦超[1] 姜兴[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2012年第3期189-192,共4页Journal of Guilin University of Electronic Technology

基　　金：广西科学研究与技术开发计划(0996028);广西研究生教育创新计划(2010105950809M17)

摘　　要：针对汽车防撞雷达系统,设计了11.8GHz低相噪频率源。在对锁相环技术研究的基础上,分析相位噪声达到要求指标的可行性,并介绍鉴相器电路、压控振荡器电路以及环路滤波器电路的设计。测试结果表明该输出频率为11.8GHz的频率源获得很好的相位噪声性能,实现1kHz处相位噪声指标优于-90dBc/Hz,并且其他指标均达到要求。11.8GHz低相噪频率源能提高汽车防撞雷达系统的性能。Low phase noise frequency synthesizer plays an important role in radar system. A 11.8 GHz low phase noise frequency synthesizer is designed for automotive anti-collision radar. Based on the study of phase locked-loop （PLL）, the possibility for the implement of low phase noise is analysed, the design of the phase frequency detector, the VCO and the loop-filter is also introduced. The test result of the 11.8 GHz frequency synthesizer shows low phase noise is below --90 dBc/Hz at 1 kHz. The other results also reach intended targets. The 11.8 GHz low phase noise frequency synthesizer enhances the performance of the automotive anti-collision radar.

关 键 词：频率源 锁相环 相位噪声 

分 类 号：TN911[电子电信—通信与信息系统]