A Novel Coding Metasurface for Wireless Power Transfer Applications

Nguyen Minh Tran, Muhammad Miftahul Amri, Je Hyeon Park, Sa Il Hwang, Dong In Kim and Kae Won Choi
Additional contact information
Nguyen Minh Tran: Department of Electronic, Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Muhammad Miftahul Amri: Department of Electronic, Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Je Hyeon Park: Department of Electronic, Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Sa Il Hwang: Department of Electronic, Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Dong In Kim: Department of Electronic, Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea
Kae Won Choi: Department of Electronic, Electrical and Computer Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Korea

Energies, 2019, vol. 12, issue 23, 1-14

Abstract: We propose and implement a novel 1-bit coding metasurface that is capable of focusing and steering beam for enhancing power transfer efficiency of the electromagnetic (EM) wave-based wireless power transfer systems. The proposed metasurface comprises 16 × 16 unit cells which are designed with a fractal structure and the operating frequency of 5.8 GHz. One PIN diode is incorporated within each unit cell and enables two states with 180 ° phase change of the reflected signal at the unit cell. The two states of the unit cell correspond to the ON and OFF states of the PIN diode or “0” and “1” coding in the metasurface. By appropriately handling the ON/OFF states of the coding metasurface, we can control the reflected EM wave impinged on the metasurface. To verify the working ability of the coding metasurface, a prototype metasurface with a control board has been fabricated and measured. The results showed that the coding metasurface is capable of focusing beam to desired direction. For practical scenarios, we propose an adaptive optimal phase control scheme for focusing the beam to a mobile target. Furthermore, we prove that the proposed adaptive optimal phase control scheme outperforms the random phase control and beam synthesis schemes.

Keywords: 1-bit unit cell; coding metasurface; adaptive beam focusing; wireless power transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/12/23/4488/pdf (application/pdf)
https://www.mdpi.com/1996-1073/12/23/4488/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:12:y:2019:i:23:p:4488-:d:290713

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().