Transmission based characterisation of superconducting metamaterial

Waveguides with superconducting Josephson junction-based metamaterial are widely used as parametric amplifiers. However, the precise estimation of power entering the device is crucial for the estimation of gain and noise temperature. This is nontrivial when the measurement tract is not symmetrical....

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Main Authors: Kern, Samuel, Neilinger, Pavol, Manca, Daniel, Il'ichev, Evgeni, Schmelz, Matthias, Kunert, Jürgen, Oelsner, Gregor, Stolz, Ronny, Grajcar, Miroslav
Format: Conference Proceeding
Language:English
Subjects:
Attenuation
Calibration
Josephson junctions
Metamaterials
Noise temperature
Nonlinear systems
Parametric amplifiers
Superconductivity
Waveguides
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creator Kern, Samuel
Neilinger, Pavol
Manca, Daniel
Il'ichev, Evgeni
Schmelz, Matthias
Kunert, Jürgen
Oelsner, Gregor
Stolz, Ronny
Grajcar, Miroslav
description Waveguides with superconducting Josephson junction-based metamaterial are widely used as parametric amplifiers. However, the precise estimation of power entering the device is crucial for the estimation of gain and noise temperature. This is nontrivial when the measurement tract is not symmetrical. We present a basic framework for the analysis of properties of such nonlinear systems and calibration of the input power. Utilizing measurements with varied temperature and power of the input signal, we estimate additional attenuation of the input line. We demonstrate a precise calibration procedure of a Josephson junction metamaterial.
doi_str_mv 10.1063/5.0067203
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects Attenuation
Calibration
Josephson junctions
Metamaterials
Noise temperature
Nonlinear systems
Parametric amplifiers
Superconductivity
Waveguides
title Transmission based characterisation of superconducting metamaterial
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