345 GHz prototype SIS mixer with integrated MMIC LNA

P. Pütz, A. Hedden, P. Gensheimer, D. Golish, C. E. Groppi, C. Kulesa, G. Narayanan, A. Lichtenberger, J. W. Kooi, N. Wadefalk, S. Weinreb, C. K. Walker

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We report on heterodyne measurements at submillimeter wavelengths using a receiver with a Superconductor-Insulator-Superconductor (SIS) mixer device and a Microwave Monolithic Integrated Circuit (MMIC) cryogenic low noise amplifier (LNA) module integrated into the same block. The mixer characterization presented in this work demonstrates the feasibility of operating a MMIC LNA in close proximity to the SIS device without penalty in mixer performance due to heating effects. Verification of this functionality is crucial for the ongoing development of SuperCam, a 64-pixel focal plane array receiver consisting of eight, 1 × 8 integrated mixer/LNA modules. The test setup included a mixer block modified to accept a MMIC amplifier. Our tests show that the LNA can be operated over a broad range of V drain voltages from 0.40-1.40 V, corresponding to dissipative powers of 2.6-29 mW. We observe no significant effect on the measured uncorrected receiver noise temperatures in the 345 GHz band.

Original languageEnglish (US)
Pages (from-to)1365-1379
Number of pages15
JournalInternational Journal of Infrared and Millimeter Waves
Issue number10
StatePublished - Oct 2006


  • Array
  • Heterodyne receiver
  • Low noise amplifier
  • MMIC
  • SIS mixer
  • Submillimeter

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering


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