| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
We developed full polarimetric direction borehole radar. In this radar, we may have six antenna elements maximally at both a transmitter and a receiver. The single-hole measurement showed occurrence of guide modes such as HE11 mode in single-hole measurement. However, we found that we might remove it with an optimal bandpass filtering. We conducted field experiments with a vertical foundation pile and an inclined borehole. In this measurement, we made use of the polarization information with the developed radar. The experimental results showed that successful estimation of an inclination of the pile as well as a position in three-dimensional space. Additionally the experimental and theoretical investigation showed that there are critical situations when a plane wave is incident on the dipole array antenna obliquely.
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