Accurate noise measurements of superconducting quasiparticle array mixers
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6402404
The authors have constructed a 30-40 GHz test apparatus which allows them to measure the noise temperatures of SIS mixers with an accuracy of better than + or -1 K. This is a factor of six improvement over earlier measurements. The most accurate measurement made thus far of a mixer which uses a single Pb-alloy junction yielded T/sub M/ = 9.2 + or - 0.9 K; and mixer gain: G/sub M/ = 0.240 + or - 0.005. In addition, SIS mixers employing arrays of N = 1, 5, 10, 25, and 50 tunnel junctions in series have been tested. The input power required to saturate the array mixers was found to increase as N/sup 2/ and the gain and noise temperature of the array mixers were independent of N.
- Research Organization:
- Department of Physics, University of California, Berkeley, California
- OSTI ID:
- 6402404
- Report Number(s):
- CONF-840937-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-21:2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of gain and noise in SIS quasiparticle mixers
Arrays of superconducting tunnel junctions as low-noise 10-GHz mixers
Quantum limited quasiparticle mixers at 100 GHz
Thesis/Dissertation
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:5137923
Arrays of superconducting tunnel junctions as low-noise 10-GHz mixers
Journal Article
·
Tue May 15 00:00:00 EDT 1979
· Appl. Phys. Lett.; (United States)
·
OSTI ID:6115031
Quantum limited quasiparticle mixers at 100 GHz
Conference
·
Sat Sep 01 00:00:00 EDT 1990
·
OSTI ID:5904611