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Microstrip superconducting quantum interference device radio-frequency amplifier: Scattering parameters and input coupling

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.2902173· OSTI ID:957184
;
The scattering parameters of an amplifier based on a dc Superconducting QUantum Interference Device (SQUID) are directly measured at 4.2 K. The results can be described using an equivalent circuit model of the fundamental resonance of the microstrip resonator which forms the input of the amplifier. The circuit model is used to determine the series capacitance required for critical coupling of the microstrip to the input circuit.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
957184
Report Number(s):
LLNL-JRNL-400794
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 92; ISSN APPLAB; ISSN 0003-6951
Country of Publication:
United States
Language:
English

References (10)

The superconducting quantum interference device microstrip amplifier: Computer models journal December 2000
High-Contrast Dispersive Readout of a Superconducting Flux Qubit Using a Nonlinear Resonator journal March 2006
Measurements of the dynamic input impedance of a dc SQUID journal November 1985
Radio-frequency amplifier based on a niobium dc superconducting quantum interference device with microstrip input coupling journal June 1998
Microstrip superconducting quantum interference device radio-frequency amplifier: Tuning and cascading journal November 1999
Superconducting quantum interference device as a near-quantum-limited amplifier at 0.5 GHz journal February 2001
Quantum limits on noise in linear amplifiers journal October 1982
Microwave cavity searches for dark-matter axions journal June 2003
The Radio-Frequency Single-Electron Transistor (RF-SET): A Fast and Ultrasensitive Electrometer journal May 1998
Ultra‐low‐noise tunnel junction dc SQUID with a tightly coupled planar input coil journal April 1982

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Related Subjects

42 ENGINEERING
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLIFIERS
CAPACITANCE
EQUIVALENT CIRCUITS
RESONANCE
RESONATORS
SCATTERING
SQUID DEVICES