Design of broadband antennas using Non-foster matching circuit and wideband CP antennas
| Project/Area Number |
25420378
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Communication/Network engineering
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| Research Institution | Kumamoto University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 広帯域アンテナ / 小形アンテナ / NIC / 円偏波 / UWB / ノンフォスター整合回路 / 円偏波アンテナ / アンテナ / 電気的小形アンテナ / ノンフォスター回路 / 広帯域 / 非フォスター回路 / 放射効率 / 低姿勢アンテナ |
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| Outline of Final Research Achievements |
Two approaches on enhancing the bandwidth of antennas have been studied. First approach is waveguide antennas using L-shaped probe. Modifying the short wall, apertures, 3-dB axial ratio characteristics are improved and available CP azimuth rang e have been widened. And some metasurface projects regarding this have been carried out. This antenna almost cover the UWB high band with circular polarization.
As a second approach, bandwidth of small antenna with backing conductor have been enhanced using negative impedance converter (NIC). In the UHF band, the -10-dB S11 characterictics are widened to 10 MHz from 1 MHz. In addition to this, some approach to control the coupling between transitors' terminal can show that it makes the available frequency move to higher at around 1 GHz.
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Report
(4 results)
Research Products
(25 results)
