Minimum noise temperature of a practical SIS quantum mixer |
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Authors: | H. J. Hartfuss and M. Tutter |
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Affiliation: | (1) Max-Planck-Institut für Plasmaphysik, EURATOM Ass., 8046 Garching, W.-Germany |
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Abstract: | Noise temperature of a SIS quantum mixer has been calculated as function of local oscillator voltage and signal source conductance on the basis of a measured I–V characteristic. Applying Tucker's quantum theory of mixing /1/, it is shown that the SIS mixer is quantum noise limited. Using cryogenic intermediate frequency amplifier, receiver noise temperature of 20 K seems to be possible at mm wavelength. |
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Keywords: | SIS tunnel junction low noise mm-wave receiver |
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