A waveguide filter bank for millimeter-wave spectroscopy

Abstract

We present the design concept and our latest simulation results for a novel low (R~100) to moderate (R~1000) resolution multi-pixel direct detection spectrometer operating at millimeter (mm) and submillimeter (submm) wavelengths. This design implements a transmission line filter bank using rectangular waveguide resonant cavities as a series of frequency filters, each terminated by a lumped-element kinetic inductance detector (LEKID).