| Presentation | 2011-07-13 SIS junction as microwave and millimeter wave noise source Hirofumi INOUE, Takashi NOGUCHI, Kotaro KOHNO, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For the accurate characterization of low noise amplifiers in the microwave frequency, a noise source using shot noise generated by a Superconductor-Insulator-Superconductor (SIS) junction is developed. A Nb-Al/AlOx-Nb SIS junction with an area of 1×1μm^2 is fabricated on a quartz substrate and is mounted in a housing. Gain and noise temperature of a 4-8 GHz low noise amplifier with a cooled isolator is measured by this SIS noise source and compared with those measured by the conventional cold attenuator method. Although the noise temperature measured by the SIS noise source was systematically 1-2 K higher than that measured by the conventional method, it is shown that the difference of gain was within 0.5 dB and that the noise temperature can be measured with an higher accuracy than the conventional method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Noise Source / Superconducting Tunnel Junction / Radio Astronomy |
| Paper # | SCE2011-5 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2011/7/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | SIS junction as microwave and millimeter wave noise source |
| Sub Title (in English) | |
| Keyword(1) | Noise Source |
| Keyword(2) | Superconducting Tunnel Junction |
| Keyword(3) | Radio Astronomy |
| 1st Author's Name | Hirofumi INOUE |
| 1st Author's Affiliation | Institute of Astronomy, University of Tokyo() |
| 2nd Author's Name | Takashi NOGUCHI |
| 2nd Author's Affiliation | National Astronomical Observatory of Japan |
| 3rd Author's Name | Kotaro KOHNO |
| 3rd Author's Affiliation | Institute of Astronomy, University of Tokyo |
| Date | 2011-07-13 |
| Paper # | SCE2011-5 |
| Volume (vol) | vol.111 |
| Number (no) | 130 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |