Demonstration of SQUID (superconducting quantum interference device) parametric amplifier. Annual report No. 1, 14 September 81-14 September 82

Technical Report · Mon Nov 01 00:00:00 EST 1982

OSTI ID:5825948

Silver, A H

This is the first Annual Report of an effort to demonstrate a low noise superconducting microwave amplifier. The amplifier is a nearly degenerate, single idler parametric amplifier which uses the nonlinear inductance of a single junction SQUID (Superconducting Quantum Interference Device). The design frequency is 9 GHz, 10 dB gain, and 16% bandwidth. In order to maximize the saturation power, the device impedance was chosen near 1ohm and a matching network was designed to transform to 50ohm. In later designs, a coherent array of SQUIDs is expected to increase the power and impedance. This report includes the design and test of the 50ohm to 1ohm broadband transformer, design and fabrication of the SQUID amplifier, and both saturation and noise analyses of the single SQUID and SQUID array. The analytical results, reported to the 1982 Applied Superconductivity Conference are: the noise temperature of the single SQUID parametric amplifier is equal to the amplifier termination temperature T(o), the response is linear to several percent of the flux quantum energy in the SQUID: the amplifier will be saturated by broad band noise if the noise source temperature is much greater than 10 To; and the array parametric amplifier has the same noise temperature as the single device indicating an N-fold increase in dynamic range.

• Research Organization: TRW Space and Technology Group, Redondo Beach, CA (USA). Applied Technology Div.
• OSTI ID: 5825948
• Report Number(s): AD-A-127269/9
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MICROWAVE AMPLIFIERS
SQUID DEVICES
PARAMETRIC AMPLIFIERS
USES
AMPLIFIERS
ENERGY
GAIN
INTERFERENCE
JOSEPHSON JUNCTIONS
JUNCTIONS
NOISE
POWER
QUANTUM ELECTRONICS
SATURATION
SUPERCONDUCTIVITY
AMPLIFICATION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
PHYSICAL PROPERTIES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
420201* - Engineering- Cryogenic Equipment & Devices