| Project/Area Number |
07555420
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
情報通信工学
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| Research Institution | Yamagata University |
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Principal Investigator |
OHSHIMA Shigetoshi Yamagata University Faculty of Engineering Professor, 工学部, 教授 (40124557)
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| Co-Investigator(Kenkyū-buntansha) |
KUSUNOKI Masanobu Yamagata University Faculty of Engineering Research Associate, 工学部, 助手 (20282238)
KAMBE Shiro Yamagata University Graduate School of Engineering Associate Professor, 工学研究科, 助教授 (20211188)
ONO Mitsuhiro Yamagata University Faculty of Engineering Professor, 工学部, 教授 (60007010)
奥山 克郎 山形大学, 工学部, 教授 (70007011)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | superconducting antenna / patch antenna / YBCO thin film / antenna gain / array antenna / oxide superconductor |
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| Research Abstract |
We have investigated the sub-millimeter wave superconducting array antenna, design, fabrication and characterization. These experimental results are as follows ;
(1) Establishment of the design method of patch antenna operated at microwave region.
We designed the patch antenna with a resonance frequency of 5 GHz and an input impedance of 50 ohms by the transmission line model and a Sonnet Software. In order to check the validity of the transmission line model, we first fabricated the Cu patch antenna, We could obtain the Cu patch antenna with input impedance of approximately 50 ohms and the resonance frequency of 50 ohms.
(2) Fabrication and characterization of superconducting patch antenna.
We fabricated the superconducting patch antenna using YBCO thin films. The input impedance of these antenna was slightly larger than that of designed value, 50 ohms. The gain of superconducting patch antenna was 2-4 dB higher than that of Au film antenna.
(3) Preparation of YBCO thin film for microwave applications by a plasma coupled magnetron sputtering.
We fabricated the YBCO thin films for superconducting antenna by a plasma coupled magnetron sputtering. The Tc and Jc of these films obtained were 87K and 4 x 10^6A/cm^2 at 77K,respectively.
(4) Study on a log-periodic antenna operated in millimeter and sub-millimeter wave region
We designed and fabricated the log-periodic antenna for millimeter and sub-millimeter weve region. We confirmed that the antenna was operated up to 40 GHz. The gain was approximately the same with that of a patch antenna.
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