1992 Fiscal Year Final Research Report Summary
Research on Fabrication of Superconducting Receiver for Submillimeter-Wave Measurement
| Project/Area Number |
03555010
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
物理計測・光学
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
YOSHIDA Keiji Kyushu Univ.,Fac.Eng.,Assoc.Prof., 工学部, 助教授 (80108670)
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| Co-Investigator(Kenkyū-buntansha) |
KAWABE Ushio Hitachi Lab.,Superconducting Electronics,chief, 超伝導エレクトロニクス研究センター, 研究主管
TAKADA Susumu Electro-Technical Lab.,Electron Device,chief, 電子デバイス部, 室長
ENPUKU Keiji Kyushu Univ.,Fac.Eng.,Assoc.Prof., 工学部, 助教授 (20150493)
INATANI Junji National Observatory,Radio Astronomy, Prof., 電波天文学, 教授 (20134629)
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| Project Period (FY) |
1991 – 1992
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| Keywords | Submillimeter Wave / Superconducting Oscillator / Josephson Junction |
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| Research Abstract |
The propose of this research is to develop a new superconducting oscillator for measuring submillimeter waves. In this research we obtained the following results:
1.Evaluation of the Performance of the Flux-Flow Oscillator (FFO)
We succeeded in the observation of the oscillation characteristics in the frequency range between 100GHz and 1500GHz using NbN/Pb Josephson junctions and Nb/Al/Nb Josephson junctions. Using the former junction we showed that the currents of 1-3 mA can be induced in the striplines. Using the latter junction we succeeded in obtaining oscillation output at frequencies more than 1THz.
2.Development of Impedance Matching Circuit with Inductive Coupling Method
We showed by simulation that broad band matching circuits can be realized using double resonance effects. Using this design we fabricated an FFO using NbN/Pb Josephson junction and a stripline made of NbN/Nb_2O_5/Nb, and succeed in demonstrating the validity of the inductive coupling method.
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