摘要
提出了一种新的针对采用二阶无源滤波器的锁相环频率合成器锁定时间的估算公式,并通过仿真软件及实测结果对该公式进行了验证。基于该估算公式,设计了一种具有快速锁定功能的锁相环频率合成器。实验结果表明该锁相环频率合成器锁定时间小于7μs,具有快速锁定的功能。同时该锁相环还具有良好的相位噪声性能,对于32GHz输出信号相位噪声为-72dBc/Hz@1kHz以及-90dBc/Hz@1MHz。
In this paper, a new estimation formula for lock time of phase-locked loop (PLL) frequency synthesizer utilizing second order passive filter is proposed. The formula is verified by simulated and measured results. Then a fast-locking PLL frequency synthesizer is designed based on the estimation formula. Experimental results show that the lock time is less than 71μs which means the PLL has a good performance of fast-locking. Experimental results also show that the PLL has a good phase noise performance of -72dBc/Hz@ lkHz and -90dBc/Hz@ 1MHz at 32 GHz.
出处
《微波学报》
CSCD
北大核心
2012年第1期57-61,共5页
Journal of Microwaves
基金
国家973计划项目(2009CB320207)
上海市科委项目(10706200200)
关键词
毫米波全息成像
频率合成器
锁相环
锁定时间
millimeter-wave holography imaging, frequency synthesizer, phase-locked loop, lock time
作者简介
陈敏华男,1985年生,博士生。主要研究方向:微波毫米波固态源技术研究。E-mail:minhuachen@mail.sim.ac.cn