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A technique for noise measurements of SIS receivers

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2 Author(s)
Qing Ke ; Dept. of Electr. Eng., Rochester Univ., NY, USA ; M. J. Feldman

We present a simple new technique to determine the noise temperature of the RF input section of a superconducting quasiparticle heterodyne receiver. This quantity is difficult to measure by existing methods. The new technique uses standard hot/cold-load measurements, and the precision should be as good as the hot/cold-load determination of receiver noise temperature. For most receivers, correction terms will be much smaller than the quantum temperature hω/k

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:42 ,  Issue: 4 )