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

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

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ijimw...4..847o&link_type=abstract

International Journal of Infrared and Millimeter Waves, Volume 4, Issue 6, pp.847-858

Computer Science

Performance

9

Low Noise, Receiver, Mm-Wave Cryogenic Mixer

Scientific paper

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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