小型化宽带细步进频率合成器设计  

Design of miniaturization wide band and small step frequency synthesizer

作　　者：王文凯 WANG Wenkai(Southwest Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]西南电子技术研究所,四川成都610036

出　　处：《电子设计工程》2021年第8期58-62,共5页Electronic Design Engineering

摘　　要：在通信侦察系统中,超外差接收体制为适用范围很广的一种侦察体制,频率合成器是其中必不可少的重要组成部分。针对现在工程项目中实现频率合成器宽频带、细步进、低相位噪声的目的,相比于单环锁相环设计,文中通过多环设计方法实现了频率合成器杂散抑制、相位噪声等技术指标上的提高。通过在某机载项目上进行验证,实现了3.7~6.8 GHz、步进1 MHz、杂散抑制优于70 dBc、相位噪声优于-100 dBc/Hz@10 kHz的技术指标,满足实际工程应用要求。In the communication reconnaissance system,the superheterodyne receiving system is an investigation system with a wide range of applications.The purpose of realizing the wide band,small step and low phase noise for frequency synthesizer in the engineering project,comparing to single looked look loop technique,in this paper,polycyclic looked look loop technique can effectively improve spur suppression ratio、phase noise and other technical indicators.By verification on an airborne project,this frequency synthesizer can achiev from 3.7 GHz to 6.8 GHz,steps 1 MHz,spur suppression ratio is better than 70 dBc,phase noise is better than-100 dBc/Hz@10 kHz,satisfies the requirement of practical engineering application.

关 键 词：宽频带 细步进 低杂散 低相位噪声 频率合成器 

分 类 号：TN743[电子电信—电路与系统]