适用于SSRF的高性能频率合成源设计与实现  

Design and implementation of high performance frequency synthesizer for SSRF

作　　者：袁慧 赵玉彬[1,3] 郑湘 宫鹏鹏[1,2,3] 黄雪芳 夏洋洋 赵申杰 张志刚 徐凯[1,3] 常强 刘建飞[1,3] YUAN Hui;ZHAO Yubin;ZHENG Xiang;GONG Pengpeng;HUANG Xuefang;XIA Yangyang;ZHAO Shenjie;ZHANG Zhigang;XU Kai;CHANG Qiang;LIU Jianfei(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;University of Chinese Academy of Sciences, Beijing 100049, China;Shanghai Key Laboratory of Cryogenics & Superconducting RF Technology, Shanghai 201800, China)

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院大学,北京100049 [3]上海市低温超导高频腔技术重点实验室,上海201800

出　　处：《核技术》2019年第4期25-31,共7页Nuclear Techniques

基　　金：国家自然科学基金(No.11335014)资助~~

摘　　要：主信号源是高频数字化低电平控制系统(Low Level Radio Frequency,LLRF)的重要组成部分,它不仅用于产生高稳定度的参考信号,还用于产生控制系统所需的高精度工作时钟,其性能是高频系统性能的重要保障。本文以上海同步辐射光源(Shanghai Synchrotron Radiation Facility,SSRF)的主信号源作为研究对象,通过采用锁相环技术和直接模拟合成技术实现了500 MHz的单频信号源。实验测试结果显示:两种技术分别实现了-125 dBc/Hz@1 kHz和-132 d Bc/Hz@1 k Hz的相位噪声,均满足上海光源高频系统对信号源的性能要求。[Background] The main signal source is an essential part of digital low level radio frequency (LLRF) control system. It is used not only to generate the highly stable reference signals, but also to produce the high precision working clock required by the control system of LLRF.[Purpose] This study aims to develope a high performance frequency synthesizer for Shanghai Synchrotron Radiation Facility (SSRF) so as to ensure high frequency system performance.[Methods] Two different techniques: phase-locked loop (PLL) and direct analog synthesis were employed to obtain the 500 MHz single frequency main signal source. Performance was measured and compared with the existing main signal source.[Results] The experimental results show that the phase noise is-125dBc/Hz@1 kHz and-132dBc/Hz@1 kHz respectively, both of them meet the performance requirements of the RF system of SSRF.[Conclusion] Direct analog synthesis can be used to produce main signal source for SSRF and achieve better performance.

关 键 词：低电平控制系统 锁相环 直接模拟合成 上海同步辐射光源 

分 类 号：TL503.2[核科学技术—核技术及应用]