Variable-temperature loads for use in accurate noise measurements of cryogenically-cooled microwave amplifiers and mixers |
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| Authors: | W. R. McGrath, A. V. Rä isä nen P. L. Richards |
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| Affiliation: | (1) Department of Physics, University of California, 94720 Berkeley, California;(2) Present address: Radio Laboratory, Helsinki University of Technology, 02150 Espoo, Finland |
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| Abstract: | We have demostrated the use of cryogenically-cooled variable-temperature loads for accurate noise measurements of low-noise cooled amplifiers and mixers in the microwave and millimeter wave range. The input noise temperature of the amplifier or mixer can be measured with an accuracy of ±1 K or better. |
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| Keywords: | noise measurement microwave mm-wave cryogenically-cooled amplifier mixer SIS-mixer |
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