2015 Fiscal Year Final Research Report
Development of very small isolators for multiband operation
| Project/Area Number |
25420333
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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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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Yamaguchi University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | アイソレータ / 小型化 / 低背化 |
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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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| Free Research Field |
電子デバイス工学
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