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Folded Spiral Resonator with Double-Layered Structure for Near-Field Wireless Power Transfer

Author

Listed:
  • Takaya Arai

    (Graduate School of Engineering, Nagoya Institute of Technology, Aichi 466-8555, Japan)

  • Hiroshi Hirayama

    (Graduate School of Engineering, Nagoya Institute of Technology, Aichi 466-8555, Japan)

Abstract

In this paper, a folded spiral resonator with a double-layered structure for near-field wireless power transfer is proposed. In near-field wireless power transfer, conjugate impedance matching is important to achieve high transfer efficiency. To achieve maximum available efficiency, it is common to connect a matching circuit to the antenna. However, the loss increases if a matching circuit is used. A coupling inductor with a resonant capacitor has the capability to adjust an imaginary part of the input impedance, whereas the folded spiral resonator has the capability to adjust both the imaginary and real parts of the input impedance. This resonator can achieve the maximum available efficiency without a matching circuit. This paper shows that the folded spiral resonator with a double-layered structure realizes high transfer efficiency compared to conventional models.

Suggested Citation

  • Takaya Arai & Hiroshi Hirayama, 2020. "Folded Spiral Resonator with Double-Layered Structure for Near-Field Wireless Power Transfer," Energies, MDPI, vol. 13(7), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:7:p:1581-:d:339679
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    Cited by:

    1. Xianyi Duan & Junqing Lan & Yinliang Diao & Jose Gomez-Tames & Hiroshi Hirayama & Masashi Hotta & George Fischer & Akimasa Hirata, 2021. "Reduction in Human Interaction with Magnetic Resonant Coupling WPT Systems with Grounded Loop," Energies, MDPI, vol. 14(21), pages 1-14, November.

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