研究課題/領域番号 |
22KF0292
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補助金の研究課題番号 |
21F51046 (2021-2022)
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研究種目 |
特別研究員奨励費
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配分区分 | 基金 (2023) 補助金 (2021-2022) |
応募区分 | 外国 |
審査区分 |
小区分21060:電子デバイスおよび電子機器関連
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研究機関 | 九州大学 |
研究代表者 |
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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研究分担者 |
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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研究期間 (年度) |
2023-03-08 – 2024-03-31
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研究課題ステータス |
交付 (2023年度)
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配分額 *注記 |
2,200千円 (直接経費: 2,200千円)
2023年度: 400千円 (直接経費: 400千円)
2022年度: 600千円 (直接経費: 600千円)
2021年度: 1,200千円 (直接経費: 1,200千円)
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キーワード | Metamaterial / WPT / High Impedance Substrate |
研究開始時の研究の概要 |
Wireless charging of biomedical implants will make the life of patients with implants much easier. However, it is associated with significant design challenges - efficiency degradation and the need to meet standards for exposure to electromagnetic fields. In this proposal, we will introduce a novel metamaterial and HIS to improve the performance of the WPT system.
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研究実績の概要 |
In FY2022, a new cascaded structure was proposed to improve the coupled KQ product (where K represents the coupling coefficient and Q represents the unloaded quality factor) and boost the power transfer efficiency (PTE) of the wireless power transfer (WPT) system. The structure consists of four small resonators that are cascaded together and fed with a single excitation, with each resonator consisting of two concentric rectangular rings. This cascaded structure is capable of achieving a maximum PTE of 89.5% at a transfer distance of 20 mm.
Subsequently, a passive relay system made of stacked metamaterial lenses is used to extend the power transfer distance and address misalignment issues. With the proposed WPT system, the transfer distance is increased to 80 mm with a PTE of 50%. This integration with metamaterials achieves a 300% improvement in the transfer distance with a reasonable PTE compared to the cascaded structure alone. An assembly of two stacked metamaterials is then utilized to further extend the transfer distance, providing an additional 200% enhancement without affecting PTE.
A thorough study of misalignment was conducted, demonstrating that the proposed system is capable of transferring power independently of the position of the receiver with a reasonable PTE. To the best of our knowledge, the proposed structure is the first to employ multiple cascaded resonators integrated with stacked metamaterials for WPT applications.
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現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Everything went very well and we also achieved the experimental results as expected. This might be due to our long background on electromagnetic theory and its accurate simulation techniques we have expertise so far.
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今後の研究の推進方策 |
In this year, we plan to improve the design of HIS (High-impedance substrate) and employ it to further improve the performance of the prosed WPT system.
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