基于DDS+PLL的X波段频率合成器设计  

Design of X-Band frequency synthesizer based on DDS+PLL

作　　者：胡志慧[1] 姜永华[1] 陈晓晨 杨正芳[1] 

机构地区：[1]海军航空工程学院电子信息工程系,烟台264001 [2]海军驻沈阳地区航空军代表室,沈阳110034

出　　处：《国外电子测量技术》2008年第7期39-41,57,共4页Foreign Electronic Measurement Technology

摘　　要：本文提出了DDS激励PLL的X波段频率合成器的设计方案,给出了主要的硬件选择及具体电路设计,并且对该频率合成器的相位噪声以及捕获时间进行了深入分析。最后对样机性能进行了测试,结果表明该X波段频率合成器带宽为800MHz、输出相位噪声优于-85dBc/Hz@10kHz、频率分辨率达0.1MHz,可应用于X波段雷达信号源中。This paper presents a design scheme of X-Band frequency synthesizer based on DDS-driven PLL. It gives the main hardware devices and specific circuit implementation. Deeply, it analyzes the phase noise and the capture time. At last, the performance of the prototype machine is measured. Results show that X-Band frequency synthesizer has wide bandwidth of 800 MHz, lower phase noise level better than --85 dBc/Hz@ 10 kHz and high frequency resolution of 0. 1 MHz. It can be used in X-Band radar signal generator.

关 键 词：DDS PLL 低相位噪声 环路滤波器 

分 类 号：TN74[电子电信—电路与系统]