Operation of the SUPARAMP at 33 GHz

Journal Article · Tue Jun 01 04:00:00 EDT 1976 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.322983· OSTI ID:7286651

Chiao, R Y; Parrish, P T

A 9-mm degenerate parametric amplifier was constructed using a linear series array of unbiased Josephson junctions as the active nonlinear element. A balanced diode mixer was used as a synchronous detector, with a single source serving both as the pump and as the mixer local oscillator. A stable net gain of 15 dB in an instantaneous bandwidth (FWHM) of 3.4 GHz was achieved. A system noise temperature of 220 +- 5 K (DSB) with a SUPARAMP contribution of only 20 +- 10 K was measured. Output saturation, however, was observed. This complicates the interpretation of the noise-temperature measurements and may render them upper limits. Comparison is made with the results of an earlier 3-cm SUPARAMP. The data are in substantial agreement with theoretical predictions. (AIP)

• Research Organization: Department of Physics, University of California, Berkeley, California 94720
• OSTI ID: 7286651
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 47:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ELECTRIC BRIDGES
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
JOSEPHSON JUNCTIONS
NOISE
OPERATION
PARAMETRIC AMPLIFIERS
STABILITY
SUPERCONDUCTING JUNCTIONS
TEMPERATURE NOISE