| Project/Area Number |
22K14299
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
宋 航 (ソウ コウ) 東京工業大学, 環境・社会理工学院, 助教 (80907288)
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| Project Period (FY) |
2022-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2024: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2023: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | Permittivity measurement / Conductivity measurement / Microwave measurement / Millimeter wave / microwave measurement / optical measurement |
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| Outline of Research at the Start |
In this project, an innovative optical measurement technology will be developed for characterizing the conductivity of tissues at cell level by using quantum sensing. Measurement system and protocols will be developed to challenge the precise conductivity measurement of tissues at single-cell resolution (1 um), which can differentiate the characteristics of different cells in tissues. With the precise conductivity information in micron resolution which has never been achieved before, new research directions is promising to be created for novel microwave biomedical applications.
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| Outline of Annual Research Achievements |
In this year, a new method named small distance increment method was developed to estimate the complex permittivity of the material. In the proposed method, the transmitter and receiver were formed as the monostatic radar, which is facing towards the material under test. During the measurement, the distance between radar and material changes with small increments and the signals are recorded at each position. A mathematical model is formulated to depict the relationship among the complex permittivity, distance increment, and measured signals. By fitting the model, the complex permittivity of material was successfully estimated. Furthermore, an imaging system was developed to measure the distribution of the reflectivity of a designated region. The propagation of the wave for imaging was also simulated by proposing a hybrid approach. This hybrid approach is composed by geometrical optics and physical optics methods. The transmission of the wave through shielding material is calculated by geometrical optics and the reflection from the target material is calculated by physical optics. By comparing the measurement and simulation, the good agreement was achieved. Through measuring the reflectivity distribution, the distribution complex permittivity in the region can be estimated.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
A new method was proposed to conduct the complex permittivity estimation, and an imaging system was developed which can demonstrate the reflectivity distribution of a certain area. The reflectivity is related to the complex permittivity which is able to be utilized for calculating the conductivity. These achievements can promote the development of the fused optical and microwave system for conductivity measurement.
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| Strategy for Future Research Activity |
For the next year, the fused optical and microwave system will be developed to measure the conductivity. The relationship between the optical image and the conductivity will be further studied and clarified.
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