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Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region

Author

Listed:
  • Tae-Heung Lim

    (Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea)

  • Hyunsoo Kim

    (Electronic Warfare R&D, LIG Nex1 Co., Sungnam 13488, Korea)

  • Chulhun Seo

    (School of Electronic Engineering, Soongsil University, Seoul 06978, Korea)

  • Hosung Choo

    (School of Electronic and Electrical Engineering, Hongik University, Seoul 04066, Korea)

Abstract

This paper proposes a Moiré-inspired metasurface lens system to focus electromagnetic power in the Fresnel near-field region. The proposed metasurface lens (MSL) system is composed of two MSLs and a square patch antenna source. The MSLs are modeled based on the transmit phase distributions of Moiré lens theory, and each unit cell structure (patch shape and Jerusalem cross slot shape) is determined to fit the calculated transmit phase distributions at each location. When changing the unit cell structure, phase and transmittance variations are achieved over 330° and −3 dB. The square patch antenna source is then designed to excite the field to the MSLs. The measured reflection coefficients are below −10 dB at 5.8 GHz while rotating the second MSL. The focal length can be adjusted from a minimum of 38 cm to a maximum of 110 cm according to the rotation angle of the second MSL. The proposed MSL system can be employed for wireless power transmission applications to focus electromagnetic power at various locations in the near-field region.

Suggested Citation

  • Tae-Heung Lim & Hyunsoo Kim & Chulhun Seo & Hosung Choo, 2022. "Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region," Energies, MDPI, vol. 15(11), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:3911-:d:823877
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    References listed on IDEAS

    as
    1. Eunjung Kang & Jun Hur & Chulhun Seo & Hojin Lee & Hosung Choo, 2020. "High Aperture Efficiency Array Antenna for Wireless Power Transfer Applications," Energies, MDPI, vol. 13(9), pages 1-15, May.
    2. Zeeshan Ahmad & Zhonghan Wang & Zain ul Abidin Jaffri & Shudi Bao, 2022. "Accurate Theoretical Models for Frequency Diverse Array Based Wireless Power Transmission," Energies, MDPI, vol. 15(4), pages 1-12, February.
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