优于皮秒分辨率的特高频率测量方法  

Extra-High Frequency Measurement for Picoseconds Resolution

作　　者：杜保强[1] 左艳迪[1] 周渭[1,2] 董绍锋[2] 王延峰[1] 

机构地区：[1]郑州轻工业学院电气信息工程学院,郑州450002 [2]西安电子科技大学测量与仪器系,西安710071

出　　处：《北京邮电大学学报》2013年第6期84-88,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(U1304618);中国科学院精密导航定位与定时技术重点实验室开放基金项目(2012PNTT01);河南省科技攻关计划项目(132102210180);河南省教育厅科技攻关项目(14A535002);郑州市科技攻关项目(131PPTGG411-6);郑州轻工业学院博士基金项目(2011BSJJ031);中央高校基本科研专项基金项目(K5051204003)

摘　　要：特高频率的测量是当前国际时频测控领域的研究热点.针对特高频率测量难、精度不易保证等问题,结合时空转换关系,提出了一种优于皮秒分辨率的特高频率测量方法.利用异频相位检测原理,把频率的测量转换为精密短时间间隔的测量,在短时间间隔测量中引入时间和空间的转换关系,利用信号传输延迟的稳定性,通过测量空间长度量获得延迟时间相位差,最终实现特高频率的测量.实验结果证明了该方法的有效性和可行性,在射频范围内其测量分辨率可达到10-12/s量级,与传统的频率测量方法相比,具有结构简单、成本低廉及测量精度高的特点.The extra-high frequency measurement is a hot issue of research in the field of current interna- tional time-fi＇equency measurement and control. Aiming at difficult measurement and uncertain precision of extra-high frequency in time and frequency measurement domain and combining time and space conver- sion relations, an extra-high frequency measurement in picoseconds was proposed. Utilizing different fre- quency phase detection principle, a precise short time interval measurement was changed into the meas- urement of frequency. By introducing conversion relations of the time and space and using stability of sig- nal delay in the course of transmission, a phase difference of delay time was obtained based on measuring space length value. Furthermore, an extra-high frequency measurement could be achieved in the pro- posed method. Experiment shows that the measurement resolution of 10-12 within 1 s can be reached in radio frequency range. Comparing the traditional frequency measurement method, the proposed method features simple structure, low cost and high measurement precision.

关 键 词：时空转换 异频相检 延迟传输 频率测量 

分 类 号：TN935.12[电子电信—信号与信息处理]