2023 Fiscal Year Annual Research Report
High Efficiency WPT System Using Hybrid Metasurface and Reactive Impedance Surface
| Project/Area Number |
22KF0292
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| Allocation Type | Multi-year Fund |
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| Research Institution | Kyushu University |
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Principal Investigator |
Pokharel R.K. 九州大学, システム情報科学研究院, 教授 (60398568)
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| Co-Investigator(Kenkyū-buntansha) |
ALI MOHAMED 九州大学, システム情報科学研究院, 外国人特別研究員
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Keywords | WPT system / hexagonal resonators / metamaterial / human phantom |
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| Outline of Annual Research Achievements |
In FY 2023, a novel WPT system for biomedical implants was developed. The proposed system consists of symmetric Tx and Rx. Each is composed a square ring resonator and a hexagonal resonator. This approach enhances the coupled magnetic field, as well as isolates the driver/load resistances. The proposed structure employs stacked metamaterials (MTM) between the Tx and Rx, with a near-zero permeability property acting as a lens to focus the magnetic coupled field at the Rx. This results in a significant improvement in system efficiency and an increase in transmission distance. A human phantom model is then used to test the design characteristics inside the tissue. The proposed WPT system provides a PTE of 49% at a transfer distance of 20mm with an embedded depth of 10mm inside the human tissue.
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