Wideband Sub-mm Wave Superconducting Integrated Filter-bank Spectrometer
A. Pascual Laguna (TU Delft - Electrical Engineering, Mathematics and Computer Science)
K. Karatsu (TU Delft - Electrical Engineering, Mathematics and Computer Science, SRON–Netherlands Institute for Space Research)
A. Neto (TU Delft - Electrical Engineering, Mathematics and Computer Science)
A. Endo (TU Delft - Electrical Engineering, Mathematics and Computer Science)
J. J.A. Baselmans (TU Delft - Electrical Engineering, Mathematics and Computer Science, SRON–Netherlands Institute for Space Research)
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Abstract
The design of an octave bandwidth sub-mm wave superconducting on-chip filter-bank spectrometer for Astronomy is presented. An array of THz band-pass filters subdivides the bandwidth 220-440 GHz into channels with a spectral resolution of 400 and an average maximum coupling strength f/ Delta {f} of 40%. The filter-bank performance is assessed by means of a transmission line formalism that approximates its behavior. The chip is under fabrication and its measurements will follow.