Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Precision Electromagnetic Measurements

Development of the 10-V Josephson junction array at ETL

Y. Murayama, Yasuhiro Sakamoto, Koyoichi Iwasa, Masakazu Nakanishi, Hiroyuki Yoshida, U. Klein, T. Endo

Published Dec 17, 2002• 1 citation
Publisher

Abstract

The 10-V Josephson junction array has been developed at ETL. The array with 20144 junctions aligned on 4 branches of strip line generates quantized voltage steps up to 13.8 V under millimeter-wave irradiation of 90 mW and 94 GHz.>
DOI
10.1109/cpem.1994.333453

Related papers

Ten-volt Josephson junction array

Y. Murayama, Yasuhiro Sakamoto, Akio Iwasa +4 more

An array of 20144 Josephson junctions divided into four strip line branches has been developed and tested. The array generates quantized voltages up to about 14 V under millimeter-wave irradiation of 90 mW at 92.5 GHz, and will be used in a 10-V voltage standard.>

IEEE Transactions on Instrumentation and Measurement•Apr 1, 1995•14 citations

Development and investigation of Nb-Al-oxide-Nb Josephson junction arrays [voltage standard application]

A.F. Bochanov, V.D. Gelikonova, Alexander M. Klushin +2 more

An array of 3072 Josephson junctions Nb-AlO/sub x/-Nb is developed at IEM "KVARZ". Some preliminary results of an investigation of I-V curves under microwave irradiation in the 70 GHz frequency band are given. Zero current quantized voltage steps are displayed up to 450 mV with an amplitude >100 /spl mu/A. An improvement of the fabrication process, which is in progress, will enable to increase quantized voltage steps region up to 1 V.>

Conference on Precision Electromagnetic Measurements•Dec 17, 2002•0 citations

Development and investigation of Nb-Al-oxide-Nb Josephson Junction arrays

A.F. Bochanov, V.D. Gelikonova, Alexander M. Klushin

An array of 3072 Josephson junctions Nb - AlO{sub x} - Nb is developed at IEM {open_quotes}KVARZ{close_quotes}. Some preliminary results of an investigation of IV curves under microwave irradiation in the 70 GHz frequency band are given. Zero current quantized voltage steps are displayed up to 450 mV with an amplitude > 100 {mu}A. An improvement of the fabrication process, which is in progress, will enable to increase quantized voltage steps region up to IV.

•Dec 31, 1994•0 citations

Development of 10-v josephson series arrays

Se Il Park, Hyun Kwon Hong

Developed a new fabrication process for 10-V Josephson junction series arrays (JJAs). A plasma nitridation process is employed for reducing the microwave attenuation in the Josephson microstripline. Improvements of microwave attenuation are about 2 dB for test arrays of 2000, 3000, and 4000 Josephson junctions in a single stripline. We obtained stable quantized voltage steps up to 12 V at 76.4 and 86.8 GHz with step amplitudes of more than 5 /spl mu/A and stability times of more than 5 min. The circuits used 14 648 junctions arranged in 8 parallel paths.

IEEE Transactions on Instrumentation and Measurement•Apr 1, 2003•3 citations

Design and fabrication of 10 V SINIS Josephson arrays for programmable voltage standards

H. Schulze, Ralf Behr, J. Kohlmann +2 more

The fabrication and the chip layout of 69120 SINIS Josephson junction series arrays for a programmable 10 V Josephson dc voltage standard are presented. Under 70 GHz microwave irradiation, the current-voltage characteristic exhibits a non-hysteretic voltage step with a step width of 200 µA. The chip can be operated with the conventional SIS Josephson voltage standard systems.

Superconductor Science and Technology•Aug 2, 2000•67 citations

A new 10-V array of Josephson junctions based on low-frequency designs scaled up to 94 GHz

Hiroyuki Yoshida, Y. Murayama, T. Endo

A novel approach is described for the design of improved coupling of millimeter-waves in a 10-V array of Josephson junctions. In this approach, microwave structures were fabricated and tested in the range 2.8 GHz to 3.6 GHz, and a scaling calculation was then used to transform them to 94 GHz. By optimizing the trade-off between antenna size and efficiency, it was possible to make more space available on the device chip to increase the number of Josephson junctions. Simulation results showed that the optimal antenna is a short double-fin-line type. This antenna type allowed us to fabricate a Josephson junction array that had 25944 Nb/Al-AlO/sub x//Nb junctions. For this new array, zero-crossing steps were observed up to 18.5 V. The new array was then successfully used to calibrate a Zener voltage standard that had a 10-V output.

IEEE Transactions on Instrumentation and Measurement•Jan 1, 1997•4 citations
Developed a new fabrication process for 10-V Josephson junction series arrays (JJAs). A plasma nitridation process is employed for reducing the microwave attenuation in the Josephson microstripline. Improvements of microwave attenuation are about 2 dB for test arrays of 2000, 3000, and 4000 Josephson junctions in a single stripline. We obtained stable quantized voltage steps up to 12 V at 76.4 and 86.8 GHz with step amplitudes of more than 5 /spl mu/A and stability times of more than 5 min. The circuits used 14 648 junctions arranged in 8 parallel paths.
A novel approach is described for the design of improved coupling of millimeter-waves in a 10-V array of Josephson junctions. In this approach, microwave structures were fabricated and tested in the range 2.8 GHz to 3.6 GHz, and a scaling calculation was then used to transform them to 94 GHz. By optimizing the trade-off between antenna size and efficiency, it was possible to make more space available on the device chip to increase the number of Josephson junctions. Simulation results showed that the optimal antenna is a short double-fin-line type. This antenna type allowed us to fabricate a Josephson junction array that had 25944 Nb/Al-AlO/sub x//Nb junctions. For this new array, zero-crossing steps were observed up to 18.5 V. The new array was then successfully used to calibrate a Zener voltage standard that had a 10-V output.