基于多环锁相宽带细步进频率合成器的设计

摘要

To meet the requirements of wide band and small step,the frequency synthesizer based on multi-loop technology is analysed and researched. The frequency synthesizer using DDS+PLL technology is introduced in contrast to conventional single locked loop technique, the output frequency is 10-13 GHz, the frequency step is 10KHz, the phase noise is -92 dBc/Hz @lKHz and the spurious suppression ratio is -68 dBc. It can meet the needs of project practically.%为了满足宽频段、细步进频率综合器的工程需求,对基于多环锁相的频率合成器进行了分析和研究.在对比传统单环锁相技术基础上,介绍了采用DDS+PLL多环技术实现宽带细步进频综,输出频段10～13 GHz,频率步进10 kHz,相位噪声达到-92 dBc/Hz@1 kHz,杂散抑制达到-68 dBc,满足实际工程应用需求.