Sub-mm-Wave Superconducting On-Chip Filter Bank for Astronomy
Alejandro Pascual Laguna (SRON–Netherlands Institute for Space Research, TU Delft - Electrical Engineering, Mathematics and Computer Science)
K. Karatsu (SRON–Netherlands Institute for Space Research, TU Delft - Electrical Engineering, Mathematics and Computer Science)
D. J. Thoen (TU Delft - Electrical Engineering, Mathematics and Computer Science, TU Delft - Applied Sciences)
V. Murugesan (SRON–Netherlands Institute for Space Research)
A. Endo (TU Delft - Applied Sciences, TU Delft - Electrical Engineering, Mathematics and Computer Science)
J. J.A. Baselmans (SRON–Netherlands Institute for Space Research, TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
A superconducting on-chip microstrip filter bank spectrometer prototype for Far-Infrared (FIR) Astronomy is presented. The measurements showcase its capabilities towards moderate spectral resolution (f/\Delta f\sim 500) broadband FIR spectroscopy. In this sub-mm-wave filter bank, each spectral channel consists of an 'I-shaped' microstrip THz bandpass filter that couples the radiation to a Microwave Kinetic Inductance Detector (MKID) for a background limited detection and a scalable frequency-multiplexed microwave readout.