NbTiN/SiO2/Al tuning circuits for low-noise 1 THz SIS mixers

被引:15
|
作者
Jackson, BD
Iosad, NN
de Lange, G
Baryshev, AM
Laauwen, WM
Gao, JR
Klapwijk, TM
机构
[1] Space Res Org Netherlands, NL-9700 AV Groningen, Netherlands
[2] Delft Univ Technol, Dept Appl Phys, DIMES, NL-2628 CJ Delft, Netherlands
关键词
mixers; submillimeter-wave devices; superconducting devices; radio astronomy;
D O I
10.1109/77.919429
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
Waveguide SIS milers in which Nb/Al-AlOx/Nb tunnel junctions are integrated with NbTiN/SiO2/Al tuning circuits are shown to yield receiver noise temperatures as low as 565 K at 970 GHz, Analyzing the noise and gain of one such receiver, it is shown that the NbTiN ground plane is low-loss (< 0.6 dB) at 970 GHz, These results are in good agreement with results obtained previously with a quasi-optical mixer incorporating a similar tuning circuit. A decrease in sensitivity above 1 THz is attributed to increasing loss in the NbTiN.
引用
收藏
页码:653 / 656
页数:4
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