Abstract
We report on quasiparticle mixing in the frequency range 220 to 230 GHz using SIN junctions. The lowest double sideband receiver noise temperature measured was about 230 K. This result shows that the SIN junction provides an interesting alternative for high frequency heterodyne receivers where pair tunneling in SIS junctions could give rise to interference from Josephson effects.
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Blundell, R., Gundlach, K.H. A quasiparticle SIN mixer for the 230 GHz frequency range. Int J Infrared Milli Waves 8, 1573–1579 (1987). https://doi.org/10.1007/BF01012443
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DOI: https://doi.org/10.1007/BF01012443