| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
We proposed the use of the Vivaldi antenna as a broadband antenna of a ground penetrating radar (GPR) for subsurface sounding of solid bodies in the solar system. The shape of the printed conductors of the Vivaldi antenna was optimized by the particle-swarm optimization method from the view point of broadening the operating bandwidth. As the result, we could achieve the return loss of more then 10 dB over a frequency band between 300 MHz and 900 MHz that satisfies the requirement for currently proposed GPR system. According to this design, an engineering model of the antenna was fabricated and tested in an radio anechoic chamber and actual field. As the results of these test measurements, we confirmed that the fabricated Vivaldi antenna can be used as the GPR antenna for subsurface detection.
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