Stanley, M; de Graaf, S; Lindstrom, T; Salter, M; Skinner, J; Ridler, N M (2023) Design of Microwave Calibration Standards for Characterising S-Parameters of Quantum Integrated Circuits at Millikelvin Temperatures. In: 2021 51st European Microwave Conference (EuMC), 04-06 April 2022, London, UK.

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Abstract

In the field of quantum information science, superconducting quantum integrated circuits are operated at millikelvin temperatures inside dilution refrigerators. The microwave performance of such non-connectorised devices can be characterised by measuring their calibrated S-parameters. The design of high-quality microwave standards is essential to achieve accurate calibration. In this work we describe the architecture of a full 2-port S-parameter measurement set-up for use at millikelvin temperatures along with the microwave calibration unit. The design of the standards for use in the calibration unit at millikelvin temperatures is described and verified using electromagnetic simulation and measurements. The suitability of the standards is verified by characterising a commercial attenuator as a test device.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	Electromagnetics > RF and Microwave
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.23919/EuMC50147.2022.9784174
Last Modified:	18 Sep 2023 14:53
URI:	https://eprintspublications.npl.co.uk/id/eprint/9819