Asymmetric wireless power transfer systems using coupled DGS resonators

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Electronics Communications Engineering Department, Egypt-Japan University of Science and Technology">Sherif Hekal, Electrical Engineering Department, South Valley University">Adel B. Abdel-Rahman, Ahmed Allam, Hongting Jia, Microstrip Department, Electronics Research Institute">Adel Barakat, Ramesh K. Pokharel

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Keywords: defected ground structures, EM resonant coupling, wireless power transfer

JOURNAL FREE ACCESS

2016 Volume 13 Issue 21 Pages 20160591

DOI https://doi.org/10.1587/elex.13.20160591

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Abstract

This paper presents a new design for wireless power transfer (WPT) systems using asymmetric structures for the transmitter (TX) and the receiver (RX), and the TX/RX are constructed using spiral-strips defected ground structure (DGS) resonators. The proposed spiral-strips DGS resonator overcome the problem of low self-inductance that encountered by H-shape DGS resonator in [1, 2], so that the proposed WPT system that employs the proposed spiral-strips DGS resonators has better efficiency and higher power transmission distance. Design methodology of the proposed WPT system are formulated and fabricated. The measurement results show a WPT efficiency of 78% at a transmission distance of 40 mm with the TX and RX areas of 50 × 50 mm² and 30 × 30 mm², respectively.

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