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Title: Radiofrequency amplifier based on a dc superconducting quantum interference device

Abstract

A low noise radiofrequency amplifer, using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID and an input coil are maintained at superconductivity temperatures in a superconducting shield, with the input coil inductively coupled to the superconducting ring of the dc SQUID. A radiofrequency signal from outside the shield is applied to the input coil, and an amplified radiofrequency signal is developed across the dc SQUID ring and transmitted to exteriorly of the shield. A power gain of 19.5 +- 0.5 dB has been achieved with a noise temperature of 1.0 +- 0.4 K at a frequency of 100 MHz.

Inventors:
; ;
Issue Date:
OSTI Identifier:
6363096
Application Number:
ON: TI85006433
Assignee:
Dept. of Energy EDB-85-038941
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLIFIERS; DESIGN; SQUID DEVICES; RF SYSTEMS; SHIELDING; SUPERCONDUCTING COILS; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUXMETERS; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; SUPERCONDUCTING DEVICES; 420201* - Engineering- Cryogenic Equipment & Devices

Citation Formats

Hilbert, C., Martinis, J.M., and Clarke, J. Radiofrequency amplifier based on a dc superconducting quantum interference device. United States: N. p., 1984. Web.
Hilbert, C., Martinis, J.M., & Clarke, J. Radiofrequency amplifier based on a dc superconducting quantum interference device. United States.
Hilbert, C., Martinis, J.M., and Clarke, J. Fri . "Radiofrequency amplifier based on a dc superconducting quantum interference device". United States.
@article{osti_6363096,
title = {Radiofrequency amplifier based on a dc superconducting quantum interference device},
author = {Hilbert, C. and Martinis, J.M. and Clarke, J.},
abstractNote = {A low noise radiofrequency amplifer, using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID and an input coil are maintained at superconductivity temperatures in a superconducting shield, with the input coil inductively coupled to the superconducting ring of the dc SQUID. A radiofrequency signal from outside the shield is applied to the input coil, and an amplified radiofrequency signal is developed across the dc SQUID ring and transmitted to exteriorly of the shield. A power gain of 19.5 +- 0.5 dB has been achieved with a noise temperature of 1.0 +- 0.4 K at a frequency of 100 MHz.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {4}
}