Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/11/3911 |
| _version_ | 1797493576685322240 |
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| author | Tae-Heung Lim Hyunsoo Kim Chulhun Seo Hosung Choo |
| author_facet | Tae-Heung Lim Hyunsoo Kim Chulhun Seo Hosung Choo |
| author_sort | Tae-Heung Lim |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T01:21:59Z |
| format | Article |
| id | doaj.art-76b9982e48a04d3f9bb41902ca6c3275 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T01:21:59Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-76b9982e48a04d3f9bb41902ca6c32752023-11-23T13:57:10ZengMDPI AGEnergies1996-10732022-05-011511391110.3390/en15113911Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field RegionTae-Heung Lim0Hyunsoo Kim1Chulhun Seo2Hosung Choo3Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, KoreaElectronic Warfare R&D, LIG Nex1 Co., Sungnam 13488, KoreaSchool of Electronic Engineering, Soongsil University, Seoul 06978, KoreaSchool of Electronic and Electrical Engineering, Hongik University, Seoul 04066, KoreaThis 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.https://www.mdpi.com/1996-1073/15/11/3911Moiré lensfocusing electromagnetic powerFresnel near-field beam focusingmetasurfacewireless power transmission |
| spellingShingle | Tae-Heung Lim Hyunsoo Kim Chulhun Seo Hosung Choo Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region Energies Moiré lens focusing electromagnetic power Fresnel near-field beam focusing metasurface wireless power transmission |
| title | Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region |
| title_full | Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region |
| title_fullStr | Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region |
| title_full_unstemmed | Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region |
| title_short | Design of Moiré-Inspired Metasurface Lens for Focusing Electromagnetic Power in Fresnel Near-Field Region |
| title_sort | design of moire inspired metasurface lens for focusing electromagnetic power in fresnel near field region |
| topic | Moiré lens focusing electromagnetic power Fresnel near-field beam focusing metasurface wireless power transmission |
| url | https://www.mdpi.com/1996-1073/15/11/3911 |
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