We present the design and measurements of a 90GHz prototype of a millimeter-wave channelizing spectrometer realized in rectangular waveguide for astronomical instrumentation. The device was fabricated using conventional high-precision metal machining, and the spectrometer can be tiled into a 2D array to fill the focal plane of a telescope. Measurements of the fabricated five-channel device matched well with electromagnetic simulations using HFSS and a cascaded S-matrix approach. This motivated the design of a 54-channel R=200 spectrometer that fills the single-moded passband of rectangular waveguide in the 130-175 GHz and 190-250 GHz atmospheric windows for millimeter-wave spectroscopic mapping and multi-object spectroscopy.
@article{arxiv.1502.02735,
title = {A Compact Filter-Bank Waveguide Spectrometer for Millimeter Wavelengths},
author = {Sean Bryan and George Che and Christopher Groppi and Philip Mauskopf and Matthew Underhill},
journal= {arXiv preprint arXiv:1502.02735},
year = {2015}
}
Comments
7 pages, 8 figures, accepted by IEEE Transactions on Terahertz Science and Technology