基于IC的数字化低电平射频前端设计与测试  

The IC-based digital low level RF front-end design and implementation at SSRF

作　　者：付泽川[1,2] 赵玉彬[1] 赵振堂[1] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院研究生院,北京100049

出　　处：《核技术》2010年第9期649-652,共4页Nuclear Techniques

摘　　要：介绍了基于IC的上海光源储存环新一代集成数字化低电平控制器的射频前端接收器设计、制造和性能测试。用L-C滤波电路在保证性能的基础上显著减小了系统的体积;用有源混频器使本振需求仅为-10dBm,减小了系统对本振信号放大器的需求。前端接收器通道的线性度范围达到30dB;采用可变放大器有利于通道内的电平匹配;RMS幅度误差在±0.15%以内,RMS相位误差在±0.2°以内;各个通道间的耦合干扰小于-70dB。A new RF front-end was designed and tested for Shanghai Synchrotron Radiation Facility. An L-C filter low-pass circuit was introduced in the design, which remarkably reduced the volume of the front-end, with granteed performance. The use of active mixer, the needed local signal can be as low as -10 dBm, and this significantly reduces the system requirement for local amplifier. Linearity of the system reaches 30 dB. Variable gain amplifier enables a power match in the system. The amplitude inaccuracy is less than -4-0.15%, and the phase inaccuracy is less than ±0.2°. Crosstalk between adjacent channels is lower than -60 dB.

关 键 词：数字化低电平 射频前端 射频接收器 线性度 IC 

分 类 号：TL503.2[核科学技术—核技术及应用]