SIS mixer design for a broadband millimeter spectrometer suitable for rapid line surveys and redshift determinations

F. Rice*, M. Sumner, J. Zmuidzinas, Shu-I Hu, H. LeDuc, A. Harris, D. Miller

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations


We present some detail of the waveguide probe and SIS mixer chip designs for a low-noise 180-300 GHz double-sideband receiver with an instantaneous RF bandwidth of 24 GHz. The receiver's single SIS junction is excited by a broadband, fixed-tuned waveguide probe on a silicon substrate. The IF output is coupled to a 6-18 GHz MMIC low-noise preamplifier. Following further amplification, the output is processed by an array of 4 GHz, 128-channel analog autocorrelation spectrometers (WASP II). The single-sideband receiver noise temperature goal of 70 Kelvin will provide a prototype instrument capable of rapid line surveys and of relatively efficient carbon monoxide (CO) emission line searches of distant, dusty galaxies. The latter application's goal is to determine redshifts by measuring the frequencies of CO line emissions from the star-forming regions dominating the submillimeter brightness of these galaxies. Construction of the receiver has begun; lab testing should begin in the fall. Demonstration of the receiver on the Caltech Submillimeter Observatory (CSO) telescope should begin in spring 2003.

Original languageEnglish
Pages (from-to)301-311
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1 Dec 2002
EventMillimeter and Submillimeter Detectors for Astronomy - Waikaloa, HI, United States
Duration: 25 Aug 200228 Aug 2002


  • Broadband
  • Heterodyne
  • Mixer
  • SIS
  • Spectrometer
  • Submillimeter

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