NDLI: Simulation and Measurement of HTS Josephson Heterodyne Oscillator

Content Provider	IEEE Xplore Digital Library
Author	Macfarlane, J.C. Du, J. Taylor, R. Pegrum, C.M.
Copyright Year	2002
Abstract	We report continuing investigations into practical applications of the AC Josephson effect as the basis for a voltage-tunable radio-frequency oscillator. We have previously demonstrated experimentally that useful power levels (10 s of nW) and linewidths of a few kHz can be achieved in the heterodyne output from a high-temperature-superconducting resistive SQUID (HTS-RSQUID) operating in the frequency range 1-50 MHz. Those results were achieved with 2-junction R-SQUIDs incorporating current-biased shunt resistors of a few micro-ohms. We have now modified the fabrication procedures, and adjusted the shunt resistors and bias current values so that higher frequencies can be achieved. The Josephson junctions are of step-edge type, rather than the bi-crystal type used in our earlier work. The step-edge technique permits much more flexibility in the geometrical lay-out and utilizes the more cost-effective single-crystal MgO substrates. In the present paper, we report numerical simulations and experimental measurements on these devices in the frequency range up to 2 GHz.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	920
Ending Page	923
Page Count	4
File Size	673780
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	High temperature superconductors Resistors Josephson effect Voltage-controlled oscillators Radio frequency SQUIDs Fabrication Josephson junctions Numerical simulation Frequency measurement Josephson junction Heterodyne oscillator high-temperature-superconducting
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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Development of Integrated HTS SQUIDs With a Multilayer Structure and Ramp-Edge Josephson Junctions

Temperature dependence of the Josephson linewidth of resistively shunted double junction HTS SQUIDs

On-chip integration of HTS Josephson oscillator and mixer

Characterizations of High-Temperature Superconducting Step-Edge Josephson Junction Mixer

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Self-induced Structure in the Current-Voltage Characteristics of RSQUIDs

Heterodyne detector using a SNS junction

Dynamics of quasioptical Josephson junction arrays for submillimeter coherent sources

Fabrication of Inductively-Coupled Double-Josephson Junctions Using High-Temperature Superconductors

Simulation and Measurement of HTS Josephson Heterodyne Oscillator

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On-chip integration of HTS Josephson oscillator and mixer

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