Superconducting quasi-particle mixers for moderate power levels using refractory metals. Report for September 1983-September 1984
Technical Report
·
OSTI ID:5621951
All refractory superconductive tunneling devices were evaluated as millimeter-wave mixers at 115 GHz. Niobium-amorphous silicon-niobium devices fabricated by Sperry Research Center, Sudbury, MA. were measured and yielded single-side-band (SSB) noise temperature below 60 K and conversion losses of 6 dB. An automated test apparatus operating between 80 and 120 GHz was constructed that will reduce testing time for individual mixers to one day compared to one week previously required. A general computer program for analyzing SIS mixers was developed that permits the study of devices with a wide range of values for junction capacitance. Detailed analysis of realistic junction configurations indicate that chaos is not likely to be problem in practical SIS mixer systems.
- Research Organization:
- National Aeronautics and Space Administration, New York (USA). Goddard Inst. for Space Studies
- OSTI ID:
- 5621951
- Report Number(s):
- AD-A-953999/0/XAB
- Country of Publication:
- United States
- Language:
- English
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