Printed split-ring loops with high q-factor for wireless power transmission

Jingchen Wang; Mark Paul Leach; Eng Gee Lim; Zhao Wang; Rui Pei; Zhenzhen Jiang; Yi Huang

doi:10.3390/electronics10222884

Printed split-ring loops with high q-factor for wireless power transmission

Jingchen Wang, Mark Paul Leach, Eng Gee Lim^*, Zhao Wang, Rui Pei, Zhenzhen Jiang, Yi Huang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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.

Original language	English
Article number	2884
Journal	Electronics (Switzerland)
Volume	10
Issue number	22
DOIs	https://doi.org/10.3390/electronics10222884
Publication status	Published - 1 Nov 2021

Keywords

Magnetic resonance coupling
Planar spiral coil
Split-ring loops
Wireless power transmission

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10.3390/electronics10222884

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title = "Printed split-ring loops with high q-factor for wireless power transmission",

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 = "Magnetic resonance coupling, Planar spiral coil, Split-ring loops, Wireless power transmission",

author = "Jingchen Wang and Leach, {Mark Paul} and Lim, {Eng Gee} and Zhao Wang and Rui Pei and Zhenzhen Jiang and Yi Huang",

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AU - Wang, Jingchen

AU - Leach, Mark Paul

AU - Lim, Eng Gee

AU - Wang, Zhao

AU - Pei, Rui

AU - Jiang, Zhenzhen

AU - Huang, Yi

PY - 2021/11/1

Y1 - 2021/11/1

N2 - 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.

AB - 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.

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KW - Wireless power transmission

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Printed split-ring loops with high q-factor for wireless power transmission

Abstract

Keywords

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