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Kinetic inductance as a microwave circuit design variable by multilayer fabrication.

Adamyan, A A*; de Graaf, S E; Kubatkin, S E*; Danilov, A V* (2015) Kinetic inductance as a microwave circuit design variable by multilayer fabrication. Supercond. Sci. Technol., 28 (8). 085007

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Abstract

We report on the development of a reliable NbN/Al/Nb/NbN multilayer fabrication technique for combining design elements with and without kinetic inductance in superconducting microwave circuits. As a proof-of-concept we demonstrate the application of the proposed technique to build a slow microwave propagation line matched to 50O terminals. Fabrication details along with the design and measurements are discussed. At 8 GHz the presented device operates as a dc controllable full-turn phase shifter. We suggest that by exploiting the kinetic inductance as a design variable one can greatly improve operation parameters for a variety of standard microwave designs such as step-impedance filters and resonators.

Item Type: Article
Keywords: Superconducting circuit elements, parametric amplification, multilayer fabrication, kinetic inductance
Subjects: Quantum Phenomena
Quantum Phenomena > Nanophysics
Identification number/DOI: 10.1088/0953-2048/28/8/085007
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6725

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