Title :
SIS junctions with frequency dependent damping for a programmable Josephson voltage standard
Author :
Hassel, Juha ; Seppä, Heikki ; Grönberg, Leif ; Suni, Ilkka
Author_Institution :
Meas. Technol., VTT Auton., Finland
fDate :
4/1/2001 12:00:00 AM
Abstract :
Experimental and computational results on programmable Josephson junction array (JJA) chips based on superconductor-insulator-superconductor (SIS) junctions are presented. Implications of circuit design and fabrication process on the performance are discussed. We introduce a method to decrease the attenuation of the pump microwave. Different designs are compared, suggesting that 1 V chips operating at the third constant voltage step with 70 GHz pump frequency can be produced with our process
Keywords :
Josephson effect; circuit CAD; circuit simulation; damping; measurement standards; microstrip lines; superconducting arrays; superconducting microwave devices; voltage measurement; 1 V; 1 V chips; 70 GHz; 70 GHz pump frequency; SIS junctions; attenuation; circuit design; fabrication; frequency dependent damping; programmable Josephson voltage standard; pump microwave; superconductor-insulator-superconductor junctions; Attenuation; Circuit synthesis; Damping; Fabrication; Frequency dependence; Josephson junctions; Microwave theory and techniques; Superconducting devices; Superconducting microwave devices; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
