A millimeter-wave on-chip superconducting filter bank spectrometer for atmospheric science

A. Orlando; C. N. Thomas; D. J. Goldie; P. Hargrave; R. Sudiwala; P. K. Dongre; S. Withington

doi:10.1117/12.2564383

13 December 2020 A millimeter-wave on-chip superconducting filter bank spectrometer for atmospheric science

A. Orlando, C. N. Thomas, D. J. Goldie, P. Hargrave, R. Sudiwala, P. K. Dongre, S. Withington

Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114533F (2020) https://doi.org/10.1117/12.2564383
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

We present an on-chip superconducting filter bank spectrometer based on transition-edge sensors (TES) as a technology for realising a microwave atmospheric sounding instrument with several hundred channels and sky- noise limited performance. Each device consists of a wideband feed coupled to a transmission line filter bank, with a TES behind each filter. In the first instance we have targeted atmospheric temperature sounding using the oxygen (O₂) absorption line at 60 GHz, however the device is being scaled to 180 GHz for humidity sounding. The technology developed is also generally applicable to astronomical instrumentation. We have fabricated a set of test devices to demonstrate key device technologies, such as channel placement, spectral resolution and sensitivity. We will describe device design, test configuration and results.

Citation Download Citation

A. Orlando, C. N. Thomas, D. J. Goldie, P. Hargrave, R. Sudiwala, P. K. Dongre, and S. Withington "A millimeter-wave on-chip superconducting filter bank spectrometer for atmospheric science", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114533F (13 December 2020); https://doi.org/10.1117/12.2564383

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