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
- 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}
}
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