高性能氢钟频率信号分配放大器的研制  

THE DEVELOPMENT OF HIGH-PERFORMANCE FREQUENCY SIGNAL DISTRIBUTION AMPLIFIER FOR HYDROGEN MASER

作　　者：蔡勇[1] 吴轶东[1] 张燕军[1] 谢彦[1] 

机构地区：[1]中国科学院上海天文台,上海200030

出　　处：《中国科学院上海天文台年刊》2009年第1期128-134,共7页Annals Shanghai Astronomical Observatory Chinese Academy of Sciences

基　　金：国家自然科学天文联合基金(No.10778633)项目资助课题

摘　　要：作为氢原子钟的配套设备,为保证将频率信号基本无损失地传递到用户端,高性能频率信号分配放大器在设计时就必须考虑降低噪声与插入损耗、提高隔离度和一致性等方面的要求。该文在这一背景下,研制成功的频率信号隔离放大器(1MHz～10MHz)达到了预期效果,相位噪声的插入损耗小于3dB,隔离度大于80dB,路间相位一致性好于100ps,输出信号相位温度系数小于20ps/℃,并且保持了氢钟信号的稳定度,还可用于长线传输。High performance distribute amplifier for Hydrogen maser must have the abilities of low noise floor,high isolation and good phase coherence,and it will be transmitted signals to the client with less loss of performance. This paper introduces a kind of distribution amplifier,for which the frequency range is 1～10MHz,the insertion loss of frequency phase noise is less than 3dB,the isolation ratio is more than 80dB,the phase coherence of channel to channel is less than 100ps,the temperature sensitivity of buffer output phase is less than 20ps/℃,and the frequency stability of Hydrogen maser for long distance frequency transmission can be kept.

关 键 词：隔离度 相位噪声 相位一致性 相位温度系数 

分 类 号：TH7[机械工程—仪器科学与技术]