We present latest developments of the millimetric Stationary Waves Integrated Fourier Transform Spectrometer
(SWIFTS) that uses the Kinetic Inductance Detectors (KID) technology. SWIFTs are on-chip autocorrelator
spectrometers where the incoming signal forms an interferogram by reflection in a short-circuited coplanar wave-guide.
By collecting electromagnetic (EM) energy along the guide, one can retrieve this interference pattern. A subsequent offline
Fourier transform gives spectral information with a moderate resolution (~500-1000). SWIFTS concept has already
been proven to work in the optical and microwave (<20 GHz) bands. It will be useful in any application where integrated
and broadband spectral analysis is needed, as an example it will be a practical alternative to Martin-Pupplet
interferometer. In practice, fabrication of such a device is very challenging mostly because the set of detectors has to
collect energy without destroying the interference pattern. As a consequence, design of the coupling parts is a crucial
problem that has to be tackled with the help of EM simulation tools. We present here the SWIFTS principle of operation,
details of fabrication, and the latest simulations results.
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