低相噪小步进频率合成器设计  

Design on Low Noise and Small Step Frequency Synthesizer

作　　者：赵彦芬[1] 陈荩[1] 

机构地区：[1]中国电子科技集团公司第54研究所,河北石家庄050081

出　　处：《计算机与网络》2011年第6期60-62,共3页Computer & Network

摘　　要：根据现代通信系统的需要介绍了4.5-5.2 GHz的频率合成器的设计。该频率合成器工作频带宽,步进小,尤其是具有较低的相位噪声。提出了实现小步进和低相噪的频率合成器的几种方法,最后采用小数分频和环内混频的方案。经过合理设计环路滤波器,选择合适的环路带宽,制作出高性能的频率合成器,并且对频率合成器的性能进行了分析。A design on 4.5-5.2 GHz frequency synthesizer is elaborated according to demand of modem systems. The frequency synthesizer operates in wide frequency band and fine step size, especially which could achieve much lower phase noise. Several schemes of fine step size and low phase noise frequency synthesizer are brought forward, and a final design scheme of frequency synthesizer is adopted by use of fractional frequency divider and frequency mixer. By reasonable design of loop filter, high performance frequency synthesizer is realized, and its performance is analyzed.

关 键 词：频率合成器 相位噪声 步进 

分 类 号：TN74[电子电信—电路与系统]