Broadband calibrated scattering parameters characterization of a superconducting quantum interference device amplifier

Journal Article · Mon Jul 08 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4813549· OSTI ID:22122791

Ranzani, Leonardo ^[1]; Spietz, Lafe; Aumentado, Jose ^[1]

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1. National Institute of Standards and Technology, Boulder, Colorado 80305 (United States)

In this work, we characterize the 2-port scattering parameters of a superconducting quantum interference device amplifier at {approx}20 mK over several gigahertz of bandwidth. The measurement reference plane is positioned on a 6.25 {Omega} microstrip line situated directly at the input and output of the device by means of a thru-reflect-line cryogenic calibration procedure. From the scattering parameters, we derive the device available power gain, isolation, and input impedance over the 2-8 GHz range. This measurement methodology provides a path towards designing wide-band matching circuits for low impedance superconducting amplifiers operating at dilution refrigerator temperatures.

• OSTI ID: 22122791
• Journal Information: Applied Physics Letters, Vol. 103, Issue 2; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLIFIERS
CALIBRATION
DESIGN
DILUTION
GAIN
GHZ RANGE
IMPEDANCE
REFRIGERATORS
SCATTERING
SQUID DEVICES
TEMPERATURE RANGE 0000-0013 K