| Project/Area Number |
03452095
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
応用物理学一般(含航海学)
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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) |
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, 教授 (20134629)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 1992: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1991: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Keywords | Submillimeter Wave / Superconducting Oscillator / Josephson Junction |
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| Research Abstract |
The prupose 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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