Title :
Accurate Noise Measurements of Cryogenic Microwave Amplifiers and Mixers using Variable-Temperature Loads
Author :
McGrath, W.R. ; Räisänen, A.V. ; Richards, P.L.
Author_Institution :
University of California, Department of Physics, Berkeley, California 94720
Abstract :
We have demostrated the use of cryogenic 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.
Keywords :
Blades; Cryogenics; Low-noise amplifiers; Microwave amplifiers; Noise measurement; Substrates; Superconducting device noise; Temperature measurement; Temperature sensors; Thermal resistance;
Conference_Titel :
Microwave Conference, 1985. 15th European
Conference_Location :
Paris, France
DOI :
10.1109/EUMA.1985.333524
