Title :
Josephson arrays at 70 GHz for conventional and programmable voltage standards
Author :
Behr, Ralf ; Schulze, Holger ; Müller, Franz ; Kohlmann, Johannes ; Niemeyer, Jürgen
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/1999 12:00:00 AM
Abstract :
This paper describes the performance under real calibration conditions of improved conventional Nb/Al/AlOx/Nb 10 V Josephson junction series arrays fabricated in the last two years at PTB. A new type of Nb/Al/AlOx/Al/AlOx/Al/Nb array is also described that is useful for programmable voltage standards in the frequency range from 70-90 GHz. A direct comparison with a conventional Josephson junction series array was carried out at 1.018 V. The results agree within an uncertainty of better than 1 nV
Keywords :
Josephson effect; aluminium; aluminium compounds; calibration; measurement standards; measurement uncertainty; niobium; superconducting arrays; superconducting junction devices; superconducting microwave devices; type II superconductors; voltage measurement; 1.018 V; 10 V; 70 to 90 GHz; Josephson arrays; Josephson junction; Nb-Al-AlO-Al-AlO-Al-Nb; Nb-Al-AlO-Nb; PTB; conventional voltage standards; programmable voltage standards; real calibration conditions; uncertainty; Calibration; Frequency; Josephson junctions; Microwave antenna arrays; Niobium; Stability; Superconducting microwave devices; Testing; Uncertainty; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
