A 110 GHz SIS receiver for radio astronomy |
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| Authors: | H. Ogawa A. Mizuno H. Hoko H. Ishikawa Y. Fukui |
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| Affiliation: | (1) Department of Astrophysics, Nagoya University, 464-01 Nagoya, Japan;(2) Fujitsu Laboratories Ltd., Fujitsu Limited, 243-01 Atsugi, Japan |
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| Abstract: | A 110 GHz superconductor insulator superconductor (SIS) tunnel junction receiver has been developed and used in regular astronomical observations on the 4m radio telescope at the Department of Astrophysics, Nagoya University. The SIS junction consists of a sandwich structure of Nb/AlOx/Nb, and is cooled to 4.2K with a closed cycle He-gas refrigerator. The receiver exhibits a best double side band noise temperature of 23±2 K at 110GHz. Additional measurements at 98–115 GHz indicate that the receiver has a good response over this input frequency range. |
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| Keywords: | superconductor-insulator-superconductor tunnel junction two backshort mixer millimeter wavelength |
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