Radiofrequency amplifier based on a DC superconducting quantum interference device
A method is described of amplifying a radiofrequency signal consisting of: disposing a single symmetrically biased dc SQUID and an input coil within a superconducting shield, the dc SQUID having a superconducting ring interrupted by two shunted Josephson junctions, and the input coil being inductively coupled solely to the ring of the single SQUID, establishing a constant magnetic flux threading the SQUID ring, applying the radiofrequency signal to the input coil from outside of the superconducting shield, obtaining an amplified radiofrequency signal solely from across the ring of the single SQUID, transmitting the amplified radiofrequency signal from across the SQUID ring to the outside of the superconducting shield.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4585999
- OSTI ID:
- 5537689
- Resource Relation:
- Patent File Date: Filed date 27 Apr 1984
- Country of Publication:
- United States
- Language:
- English
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Radiofrequency amplifier based on a dc superconducting quantum interference device
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Related Subjects
GENERAL PHYSICS
SQUID DEVICES
AMPLIFIERS
RF SYSTEMS
AMPLIFICATION
DIRECT CURRENT
JOSEPHSON JUNCTIONS
MAGNETIC FLUX
SHIELDS
SIGNALS
SUPERCONDUCTING COILS
CURRENTS
ELECTRIC CURRENTS
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
JUNCTIONS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
420201* - Engineering- Cryogenic Equipment & Devices