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Electronics
Volume 10
Issue 22
10.3390/electronics10222884
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Article

Printed Split-Ring Loops with High Q-Factor for Wireless Power Transmission

by
Jingchen Wang
1,
Mark Paul Leach
1,
Eng Gee Lim
1,*,
Zhao Wang
1,
Rui Pei
2,
Zhenzhen Jiang
1 and
Yi Huang
3
1
School of Advanced Technology, Xi’an Jiaotong-Liverpool University, Suzhou 215123, China
2
School of Information Science and Technology, Donghua University, Shanghai 201620, China
3
Department of Electrical Engineering and Electronics, The University of Liverpool, Liverpool L69 3BX, UK
*
Author to whom correspondence should be addressed.
Electronics 2021, 10(22), 2884; https://doi.org/10.3390/electronics10222884
Submission received: 16 September 2021 / Revised: 11 November 2021 / Accepted: 19 November 2021 / Published: 22 November 2021
(This article belongs to the Special Issue Advanced Design of RF/Microwave Circuit)
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Abstract

The use of printed spiral coils (PSCs) as inductors in the construction of Wireless Power Transmission (WPT) circuits can save space and be integrated with other circuit boards. The challenges and issues of PSCs present for WPT mainly relate to maintaining an inductive characteristic at frequencies in Ultra High Frequency (UHF) band and to maximising the power transfer efficiency (PTE) between primary and secondary circuits. A new technique is proposed to increase the Q-factor relative to that offered by the PSC, which is shown to enhance WPT performance. This paper provides four-turn planar split-ring loops with high Q-factor for wireless power transmission at UHF bands. This design enhances the power transfer efficiency more than 12 times and allows for a greater transfer distance from 5 mm to 20 mm, compared with a conventional planar rectangular spiral coil.
Keywords: wireless power transmission; magnetic resonance coupling; planar spiral coil; split-ring loops wireless power transmission; magnetic resonance coupling; planar spiral coil; split-ring loops

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MDPI and ACS Style

Wang, J.; Leach, M.P.; Lim, E.G.; Wang, Z.; Pei, R.; Jiang, Z.; Huang, Y. Printed Split-Ring Loops with High Q-Factor for Wireless Power Transmission. Electronics 2021, 10, 2884. https://doi.org/10.3390/electronics10222884

AMA Style

Wang J, Leach MP, Lim EG, Wang Z, Pei R, Jiang Z, Huang Y. Printed Split-Ring Loops with High Q-Factor for Wireless Power Transmission. Electronics. 2021; 10(22):2884. https://doi.org/10.3390/electronics10222884

Chicago/Turabian Style

Wang, Jingchen, Mark Paul Leach, Eng Gee Lim, Zhao Wang, Rui Pei, Zhenzhen Jiang, and Yi Huang. 2021. "Printed Split-Ring Loops with High Q-Factor for Wireless Power Transmission" Electronics 10, no. 22: 2884. https://doi.org/10.3390/electronics10222884

APA Style

Wang, J., Leach, M. P., Lim, E. G., Wang, Z., Pei, R., Jiang, Z., & Huang, Y. (2021). Printed Split-Ring Loops with High Q-Factor for Wireless Power Transmission. Electronics, 10(22), 2884. https://doi.org/10.3390/electronics10222884

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