**Author details**

Mohamed Aboualalaa1 \*, Hala Elsadek1 and Ramesh K. Pokharel<sup>2</sup>

1 Electronics Research Institute, Cairo, Egypt

2 Kyushu University, Fukuoka, Japan

\*Address all correspondence to: mohamed.ali@ejust.edu.eg

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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*WPT, Recent Techniques for Improving System Efficiency DOI: http://dx.doi.org/10.5772/intechopen.96003*

> *Conf. Electron. Circuits, Syst.*, vol. 1, no. 3, pp. 70-73, 2007, doi: 10.1109/

[9] M. Kiani, U. M. Jow, and M. Ghovanloo, "Design and optimization of a 3-coil inductive link for efficient wireless power transmission," *IEEE Trans. Biomed. Circuits Syst.*, vol. 5, no. 6, pp. 579-591, 2011, doi: 10.1109/

[10] A. B. Islam, S. K. Islam, and F. S. Tulip, "Design and Optimization of Printed Circuit Board Inductors for Wireless Power Transfer System," *Circuits Syst.*, vol. 04, no. 02, pp. 237- 244, 2013, doi: 10.4236/cs.2013.42032.

[11] M. Wagih, A. Komolafe, and B. Zaghari, "Dual-Receiver Wearable 6.78 MHz Resonant Inductive Wireless Power Transfer Glove Using Embroidered Textile Coils," *IEEE Access*, vol. 8, pp. 24630-24642, 2020, doi: 10.1109/

[12] X. Mou, D. T. Gladwin, R. Zhao, and H. Sun, "Survey on magnetic resonant coupling wireless power transfer technology for electric vehicle charging," *IET Power Electron.*, vol. 12, no. 12, pp. 3005-3020, 2019, doi:

[13] Z. Dai, Z. Fang, H. Huang, Y. He, and J. Wang, "Selective Omnidirectional Magnetic Resonant Coupling Wireless

Power Transfer With Multiple-Receiver System," *IEEE Access*, vol. 6, pp. 19287-19294, 2018, doi: 10.1109/

[14] M. Aboualalaa, I. Mansour, A. Barakat, K. Yoshitomi, and R. K. Pokharel, "Improvement of Magnetic Field for Near-Field WPT System Using Two Concentric Open-Loop Spiral Resonators," *IEEE Microw. Wirel. Components Lett.*, no. 2, pp. 1-4, 2020, doi: 10.1109/lmwc.2020.3016136.

ACCESS.2018.2809797.

ICECS.2007.4510933.

TBCAS.2011.2158431.

ACCESS.2020.2971086.

10.1049/iet-pel.2019.0529.

[1] "https://en.wikipedia.org/wiki/ Wireless\_power\_transfer ."

[2] T. Ohira, "The kQ Product as

*IEEE Circuits Syst. Mag.*, vol. 17, no. 1, pp. 27-32, 2017, doi: 10.1109/

MCAS.2016.2642698.

**References**

TIE.2015.2417122.

TIE.2016.2517061.

TPEL.2018.2872047.

Viewed by an Analog Circuit Engineer,"

[3] A. Ibrahim and M. Kiani, "A Figureof-Merit for Design and Optimization of Inductive Power Transmission Links for Millimeter-Sized Biomedical Implants," *IEEE Trans. Biomed. Circuits Syst.*, vol. 10, no. 6, pp. 1100-1111, 2016, doi: 10.1109/TBCAS.2016.2515541.

[4] J. H. Kim *et al.*, "Development of 1-MW Inductive Power Transfer System for a High-Speed Train," *IEEE Trans. Ind. Electron.*, vol. 62, no. 10, pp. 6242-6250, 2015, doi: 10.1109/

[5] B. H. Choi, V. X. Thai, E. S. Lee, J. H. Kim, and C. T. Rim, "Dipole-Coil-Based Wide-Range Inductive Power Transfer Systems for Wireless Sensors," *IEEE Trans. Ind. Electron.*, vol. 63, no. 5, pp. 3158-3167, 2016, doi: 10.1109/

[6] Z. Yi, M. Li, B. Muneer, and Q. Zhu, "High-efficiency mid-range inductive power transfer employing alternative-winding coils," *IEEE Trans. Power Electron.*, vol. 34, no. 7, pp. 6706-6721, 2019, doi: 10.1109/

[7] R. Matias, B. Cunha, and R. Martins, "Modeling inductive coupling for wireless power transfer to integrated circuits," *2013 IEEE Wirel. Power Transf. WPT 2013*, vol. 2, no. 1, pp. 198-201, 2013, doi: 10.1109/WPT.2013.6556917.

[8] U. M. Jow and M. Ghovanloo, "Design and optimization of printed spiral coils for efficient inductive power transmission," *Proc. IEEE Int.* 

*WPT, Recent Techniques for Improving System Efficiency DOI: http://dx.doi.org/10.5772/intechopen.96003*
