APPLICATIONS OF MM-WAVE SIS MIXERS TO MIDDLE ATMOSPHERE MONITORING SYSTEMS

被引：2

作者：

SUZUKI, H

IMAMURA, T

YOKOYAMA, N

SUZUKI, M

OGAWA, H

KAWABATA, K

FUKUI, Y

机构：

[1] FUJITSU VLSI LTD,MINOKAMO,GIFU 505,JAPAN

[2] NAGOYA UNIV,CHIKUSA KU,NAGOYA,AICHI 46401,JAPAN

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.403296

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 already developed a low-noise 100 GHz band (98-115 GHz) SIS mixer using Nb/AlOx/Nb junction technology. The mixer has a noise temperature of 17 K when used as a double sideband (DSB) heterodyne receiver. The SIS receiver has been in use in the 4 m radio telescope at Nagoya University for five years. As a further application of the SIS mixer, we developed a middle-atmosphere ozone monitoring system using an SIS mixer for the first time. The system can measure ozone mixing ratio every 5 minutes. The integration time is less than 1/10 of the time needed in a conventional system using Schottky barrier diode (SBD) mixers. We have also begun developing a 200 GHz band (210-280 GHz) SIS mixer for radio astronomy and for monitoring other minor constituents such as ClO. The preliminary experiment showed that the mixer has a rather low noise temperature of 60 K (DSB).

引用

页码：3296 / 3299

页数：4

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