Title :
Microwave coupling to large series arrays of SNS ramp-type junctions for programmable voltage standards
Author :
Popel, R. ; Muller, F. ; Hagedorn, D. ; Buchholz, F.-I. ; Dolata, R. ; Niemeyer, J.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
Large series arrays of Josephson junctions in SNS ramp-type configuration have been realized with contact areas below 0.4 /spl mu/m/sup 2/. The arrays showed excellent current-voltage characteristics with small parameter spread. For the application in programmable voltage standards, special microwave circuits have been developed containing up to 40000 junctions.
Keywords :
measurement standards; programmable circuits; strip line couplers; superconducting arrays; superconductor-normal-superconductor devices; voltage measurement; Josephson junctions; SNS ramp-type junctions; Shapiro steps; current-voltage characteristics; fabrication process; large series arrays; low-ohmic stripline; microwave coupling; programmable voltage standards; small parameter spread; Circuit testing; Integrated circuit technology; Josephson junctions; Microwave antenna arrays; Microwave circuits; Niobium; Space technology; Standards development; Stripline; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.851040
