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The simulation and design of an on-chip superconducting millimetre filter-bank spectrometer

Robson, G., Anderson, A. J., Barry, P. S., Doyle, S. ORCID: https://orcid.org/0000-0002-9054-986X and Karkare, K. S. 2022. The simulation and design of an on-chip superconducting millimetre filter-bank spectrometer. Journal of Low Temperature Physics 10.1007/s10909-022-02747-3

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Abstract

Superconducting on-chip filter banks provide a scalable, space saving solution to create imaging spectrometers at millimetre and submillimetre wavelengths. We present an easy to realise, lithographed superconducting filter design with a high tolerance to fabrication error. Using a capacitively coupled λ/2 microstrip resonator to define a narrow (λ/Δλ=300) spectral pass band, the filtered output of a given spectrometer channel directly connects to a lumped-element kinetic inductance detector. We show the tolerance analysis of our design, demonstrating <11% change in filter quality factor to any one realistic fabrication error and a full filter-bank efficiency forecast to be 50% after accounting for fabrication errors and dielectric loss tangent.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Physics and Astronomy
Additional Information: This article is licensed under a Creative Commons Attribution 4.0 International License
Publisher: Springer
ISSN: 0022-2291
Date of First Compliant Deposit: 24 June 2022
Date of Acceptance: 4 May 2022
Last Modified: 30 Nov 2022 08:08
URI: https://orca.cardiff.ac.uk/id/eprint/150775

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