Influence of Josephson currents on superconductor-insulator-superconductor mixer performance

Journal Article · Fri Nov 15 04:00:00 EST 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.335596· OSTI ID:5226411

Jablonski, D G; Henneberger, M W

Superconductor-insulator-superconductor (SIS) mixers are currently the lowest-noise devices available for mixing in the 26--110 GHz frequency range. However, a major source of noise is anticipated to be the increased effects of Josephson oscillations within the mixer as higher operating frequencies are achieved. Simulations have been done to demonstrate these effects. Results indicate that the commonly used three-port analysis is valid over a wide range of conditions, but that even minimal Josephson oscillations have a deleterious effect on mixer performance. The junction shunt capacitance, which serves to short out the Josephson oscillations, is thus an extremely important parameter. However, the characterization of the mixer in terms of an ''..omega..RC'' product appears to be an oversimplification. A more elaborate approach to mixer characterization is suggested.

• Research Organization: Naval Surface Weapons Center,10901 New Hampshire Avenue, Silver Spring, Maryland 20903-5000
• OSTI ID: 5226411
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 58:10; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
CURRENTS
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
FREQUENCY RANGE
GHZ RANGE
IMPEDANCE
JOSEPHSON JUNCTIONS
JUNCTIONS
MIXERS
NOISE
OPERATION
OSCILLATIONS
PERFORMANCE
SIMULATION
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS