| Project/Area Number |
15K06057
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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 | Yokohama National University |
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Principal Investigator |
Kuga Nobuhiro 横浜国立大学, 大学院工学研究院, 准教授 (80318906)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | Passive Intermodulation / mobile communications / microwave measurements / antenna measurements / 相互変調ひずみ / 電波暗箱 / アンテナ測定 / PIM / 受動回路の相互変調ひずみ / 非線形性 |
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| Outline of Final Research Achievements |
Sensitivity improvement of passive intermodulation (PIM) measurement for antenna is discussed. To avoid mechanical connection which is a potential PIM source in measurements, a non-contact PIM measurement method in which another antenna is used for excitation and PIM detection was proposed. It is shown that a unique value being independent of the antenna position can be derived by compensating the effect of the mutual coupling between the antennas measured by a network analyzer. It is also confirmed that the measurement is compatible with the conventional method.
As another approach to improve the sensitivity in measurement, the method to reduce the system residual noise is discussed. The method using a low-PIM conductive wire is proposed for PIM-source identification and PIM-performance evaluation of electromagnetic wave absorbers, and its effect is also shown in this project.
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