Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
권호 표지

THE DEVELOPMENT OF A LOW NOISE 230 GHZ SIS RECEIVER IN NAGOYA UNIVERSITY

  • XIAO K. C. (Department of Astrophysics, Nagoya University) ;
  • OGAWA H. (Department of Astrophysics, Nagoya University) ;
  • FUKUI Y. (Department of Astrophysics, Nagoya University) ;
  • SUZUKI H. (Fujitsu Laboratories Ltd., Fujitsu Limited)
  • Published : 1996.12.01
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Abstract

A 230 GHz SIS tunnel junction receiver has been being developed for radio astronomy in Nagoya University. In this heterodyne receiver, we use a $\~$1/3 reduced hight rectangular waveguide SIS mixer with two tuning elements as front end. The mixer block with SIS junction was cooled to 4K with a closed cycle He-gas refrigerator. So far, a double sideband receiver noise temperature lower than l00K in 222-237 GHz is obtained. The receiver exhibits a best DSB noise temperature of 69K at 236 GHz as well as 228 GHz.

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