A Compact Filter-Bank Waveguide Spectrometer for Millimeter Wavelengths

Sean Bryan, George Che, Christopher Groppi, Philip Mauskopf, Matthew Underhill

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


In this paper, we present the design and measurements of a 90 GHz 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.

Original languageEnglish (US)
Article number7120193
Pages (from-to)598-604
Number of pages7
JournalIEEE Transactions on Terahertz Science and Technology
Issue number4
StatePublished - Jul 1 2015


  • Millimeter-wave devices
  • Spectroscopy
  • channel bank filters
  • microwave filters
  • spectroradiometers

ASJC Scopus subject areas

  • Radiation
  • Electrical and Electronic Engineering


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