| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
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| Outline of Final Research Achievements |
The feasibility of multiband operation of a nonreciprocal transmission device for electromagnetic wave (isolator) was investigated. The isolator can be drastically miniaturized due to large wavelength shortening effect and large permeability difference for clockwise and counterclockwise circularly polarized electromagnetic wave, which are realized by setting the operation point of the isolator in the vicinity of ferromagnetic resonance of ferrite.
Optimal design flow of the isolator was established, and the magnetic bias field variable mechanism for multiband operation of the isolator was proposed, and the effectiveness was proved. In the isolator with a ferrite magnetic disk on a coplanar wave guide transmission line, practically utilizable nonreciprocal transmission characteristics was achieved in 4 GHz,2 GHz and 800 MHz bands in IMT-Advanced system.
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