Parametric amplification in arrays of Josephson tunnel junctions

Journal Article · Tue Mar 15 04:00:00 EST 1977 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.89381· OSTI ID:7237078

Wahlsten, S; Rudner, S; Claeson, T

Arrays of 30 series-connected unbiased small Josephson tunnel junctions give parametric amplification at 10 GHz. A pump power of 10/sup -8/ W was required and gains of up to 24 dB were achieved. The gain was constant for a large range of signal power, up to a signal output power of 10 dB below the pump power. A maximum brightness temperature of 1.7 x 10/sup 6/ K, in a bandwidth of 12 MHz, was deduced from variations of the gain with input noise level. (AIP)

• Research Organization: Department of Physics, Chalmers University of Technology, Fack, S-402 20 Gothenburg 5, Sweden
• OSTI ID: 7237078
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 30:6; ISSN APPLA
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
CRITICAL CURRENT
CURRENTS
ELECTRIC CURRENTS
ELECTRONIC EQUIPMENT
FILMS
GAIN
IMPEDANCE
JOSEPHSON JUNCTIONS
LINE WIDTHS
MICROWAVE POWER TRANSMISSION
NONLINEAR PROBLEMS
PARAMETRIC AMPLIFIERS
POWER TRANSMISSION
POWER TRANSMISSION LINES
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT