| Project/Area Number |
18K04173
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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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| Review Section |
Basic Section 21030:Measurement engineering-related
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| Research Institution | Nagasaki University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 逆散乱問題 / 等価定理 / 補間 / イメージング / 時間領域 / ゼロパディング |
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| Outline of Final Research Achievements |
In this study, we considered an inverse scattering problem that uses only the electric field without using the information of the incident wave. Specifically, we developed a method to solve the inverse scattering problem by considering the initial-boundary value problem using the electric field obtained on the observed curved surface, and confirmed the validity of the proposed method by numerical calculation in the case of two dimensions. Furthermore, it is necessary to measure the total electric field closely on the observation process, but it was shown that the inverse problem can be solved even if the observation is sparse using interpolation. Furthermore, we also conducted a three-dimensional study.
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| Academic Significance and Societal Importance of the Research Achievements |
この研究では，電波で物体の比誘電率分布などを求める方法を検討した．これは，レーダーのように物体の反射率を計測する方法と違い，物体の物理量を直接計測するものである．学術的に非常に重要な研究である．また，逆散乱問題を解くときにアンテナのモデル化を必要としないので，非常に計算を行いやすい．よって，提案する方法が医療やインフラのモニタリングなどに適用しやすくなる．
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