Title :
Frequency Uncertainty Analysis for Josephson Voltage Standard
Author :
Tang, Y. ; Lombardi, M.A. ; Howe, D.A.
Author_Institution :
National Inst. of Stand. & Technol., Gaithersburg, MD
Abstract :
The uncertainty in voltage measurement in a Josephson voltage standard (JVS) is proportional to the uncertainty in frequency measurement. The 10 MHz time-base from various commonly used frequency standards for JVS are analyzed using Allan variance to determine the contribution to the uncertainty budget for voltage measurement. The 75 GHz microwave source along with phase-lock electronics and frequency counter for a Josephson junction array is also analyzed for its stability and contribution to JVS uncertainty budget. The results provide realistic estimation for uncertainty contributions of time base and frequency measurements in JVS
Keywords :
frequency measurement; measurement standards; measurement uncertainty; superconducting junction devices; voltage measurement; 10 MHz; 75 GHz; Allan variance; Josephson junction array; Josephson voltage standard; frequency counter; frequency measurement; frequency uncertainty analysis; phase-lock electronics; time base measurement; uncertainty budget; uncertainty contributions; voltage measurement uncertainty; Analysis of variance; Counting circuits; Frequency measurement; Josephson junctions; Measurement standards; Microwave antenna arrays; Phased arrays; Stability analysis; Uncertainty; Voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2004 Conference on
Conference_Location :
London
Print_ISBN :
0-7803-8494-6
Electronic_ISBN :
0-7803-8494-6
DOI :
10.1109/CPEM.2004.305603
