EFFECT OF AN APPLIED MAGNETIC-FIELD ON THE PERFORMANCE OF A SIS RECEIVER NEAR 300 GHZ

被引:0
|
作者
MALLISON, WH
DEZAFRA, RL
机构
[1] Department of Physics, State University of New York, Stony Brook, 11794, New York
关键词
SIS RECEIVER; MAGNETIC FIELD; NB-ALOX-NB TUNNEL JUNCTIONS; MILLIMETER WAVES;
D O I
10.1007/BF01010690
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We have successfully constructed and tested a superconductor-insulator-superconductor (SIS) receiver for operation at 265 - 280 GHz using 1-mu-m2 area Nb-AlOx-Nb tunnel junctions fabricated at Stony Brook. The best performance to date is a double sideband (DSB) receiver noise temperature of 129 K at 278 GHz. We find that suppression of the Josephson pair currents with a magnetic field is essential for good performance and a stable DC bias point. Fields as high as 280 gauss have been used with no degradation of mixing performance. We illustrate the improvement in the intermediate frequency (IF) output stability with progressively increasing magnetic fields.
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页码:669 / 677
页数:9
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