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A low noise SIS array receiver for radioastronomical applications in the 35–50 GHz band

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Abstract

Arrays of six superconducting tunnel junctions have been used in a heterodyne receiver over the frequency range 35–50 GHz. The mixer array and a 3.7–4.2 GHz parametric amplifier used as the if amplifier are immersed in liquid helium and operated at 2 K. The high if allows single sideband operation with a system noise temperature varying rather smoothly from 220 K at 35 GHz to 140 K at 50 GHz. Mixer noise temperatures between 11 and 21 K were measured over the band indicating that the use of arrays to enhance the dynamic range does not seriously affect the mixer noise performance in this frequency range. The receiver is used for radio astronomical observations in the Onsala 20 m telescope in Sweden.

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Authors and Affiliations

  1. Department of Electron Physics I and Onsala Space Observatory, Chalmers University of Technology, S-412 96, Göteborg, Sweden

    L. Olsson, E. Kollberg & C. O. Lindström

  2. Department 3, National Defense Research Institute, S-581 11, Linköping, Sweden

    S. Rudner

Authors
  1. L. Olsson
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  2. S. Rudner
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  3. E. Kollberg
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  4. C. O. Lindström
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Olsson, L., Rudner, S., Kollberg, E. et al. A low noise SIS array receiver for radioastronomical applications in the 35–50 GHz band. Int J Infrared Milli Waves 4, 847–858 (1983). https://doi.org/10.1007/BF01009311

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  • DOI: https://doi.org/10.1007/BF01009311

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