1. Kurs, A., A. Karalis, R. Moffatt, J. D. Joannopoulos, P. Fisher, and M. Soljacic, "Wireless power transfer via strongly coupled magnetic resonances," Science, Vol. 317, No. 1, 83-86, Jul. 2007.
2. Basar, M. R., M. Y. Ahmadm, J. Cho, and F. Ibrahim, "Stable and high efficiency wireless power transfer system for robotic capsule using a modified Helmholtz coil," IEEE Trans. Ind. Electron., Vol. 64, No. 2, 1113-1122, Feb. 2017.
3. Yedavalli, P. S., T. Riihonen, X. Wang, and J. M. Rabaey, "Far-field RF wireless power transfer with blind adaptive beam forming for Internet of Things devices," IEEE Access, Vol. 5, 1743-1752, 2017.
4. Zhang, C. and Y. Chen, "Wireless power transfer strategies for cooperative relay system to maximize information throughput," IEEE Access, Vol. 5, 2573-2582, 2017.
5. Li, Y., L. Zhang, T. Zhao, and L. Zou, "The electromagnetic compatibility analysis of experimental apparatus based on wireless power transmission," IEEE Industrial Electronics & Applications, 2334-2338, Jun. 2016.
6. Li, C. J. and H. Ling, "Investigation of wireless power transfer using planarized, capacitor-loaded coupled loops," Progress In Electromagnetics Research, Vol. 148, 223-231, 2014.
7. Fan, Y., L. Li, S. Yu, C. Zhu, and C.-H. Liang, "Experimental study of efficient wireless power transfer system integrating with highly sub-wavelength metamaterials," Progress In Electromagnetics Research, Vol. 141, 769-784, 2013.
8. El Badawe, M. and O. M. Ramah, "Efficient metasurface rectenna for electromagnetic wireless power transfer and energy harvesting," Progress In Electromagnetics Research, Vol. 161, 35-40, 2018.
9. Robichaud, A., M. Boudreault, and D. Deslandes, "Theoretical analysis of resonant wireless power transmission links composed of electrically small loops," Progress In Electromagnetics Research, Vol. 143, 485-501, 2013.
10. Jang, B.-J., S. Lee, and H. Yoon, "HF-band wireless power transfer system: Concept, issues, and design," Progress In Electromagnetics Research, Vol. 124, 211-231, 2012.
11. Park, S. I., "Ehancement of wireless power transmission into biological tissues using a high surface impedance ground plane," Progress In Electromagnetics Research, Vol. 135, 123-136, 2013.
12. Liu, T., X. Wang, and L. Zheng, "A cooperative SWIPT scheme for wirelessly powered sensor networks," IEEE Trans. Commun., Vol. 65, No. 6, 2740-2752, Jun. 2017.
13. Mai, V. V., W.-Y. Shin, and K. Ishibashi, "Wireless power transfer for distributed estimation in sensor networks," IEEE J. Sel. Topics Signal Process., Vol. 11, No. 3, 549-562, Apr. 2017.
14. Kim, J.-M., M. Han, and H. Sohn, "Magnetic resonance-based wireless power transmission through concrete structures," J. Electromagn. Eng. Sci., Vol. 15, No. 2, 104-110, Apr. 2015.
15. Duong, T. P. and J. W. Lee, "Experimental results of high-efficiency resonant coupling wireless power transfer using a variable coupling method," IEEE Microw. Wireless Compon. Lett., Vol. 21, No. 8, 442-444, Aug. 2011.
16. Guan, M., K. Wang, D. Xu, and W.-H. Liao, "Design and experimental investigation of a low-voltage thermoelectric energy harvesting system for wireless sensor nodes," Energy Convers. Manage., Vol. 138, 30-37, Apr. 2017.
17. Caffrey, C. M., T. Sillanpaa, H. Huovila, J. Nikunen, S. Hakulinen, and P. Pursula, "Energy autonomous wireless valve leakage monitoring system with acoustic emission sensor," IEEE Trans. Circuits Syst. I, Reg. Papers, Vol. 64, No. 11, 2884-2893, Nov. 2017.
18. Ahn, D. and S. Hong, "Effect of coupling between multiple transmitters or multiple receivers on wireless power transfer," IEEE Trans. Ind. Electron., Vol. 60, No. 7, 2602-2613, Jul. 2013.
19. Kim, Y.-J., D. Ha, W. J. Chappell, and P. P. Irazoqui, "Selective wireless power transfer for smart power distribution in a miniature-sized multiple-receiver system," IEEE Trans. Ind. Electron., Vol. 63, No. 3, 1853-1862, Mar. 2016.
20. Zhang, Y., T. Lu, Z. Zhao, F. He, K. Chen, and L. Yuan, "Selective wireless power transfer to multiple loads using receivers of different resonant frequencies," IEEE Trans. Power Electron., Vol. 30, No. 1, 6001-6005, Nov. 2015.
21. Zhang, C., D. Lin, and S. Y. Hui, "Basic control principles of omnidirectional wireless power transfer," IEEE Trans. Power Electron., Vol. 31, No. 7, 5215-5227, Jul. 2016.
22. Lin, D., C. Zhang, and S. Y. R. Hui, "Mathematical analysis of omnidirectional wireless power transfer — Part-I: Two-dimensional systems," IEEE Trans. Power Electron., Vol. 32, No. 1, 625-633, Jan. 2016.
23. Lin, D., C. Zhang, and S. Y. R. Hui, "Mathematical analysis of omnidirectional wireless power transfer — Part-II: Three-dimensional systems," IEEE Trans. Power Electron., Vol. 32, No. 1, 613-624, Jan. 2017.
24. Jonah, O., S. V. Georgakopoulos, and M. M. Tentzeris, "Orientation insensitive power transfer by magnetic resonance for mobile devices," Proc. IEEE Wireless Power Transfer, 5-8, May 2013.
25. Dai, Z., 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, 19287-19294, Apr. 2018.
26. Ouyang, Z., Z. Zhang, M. A. E. Andersen, and O. C. Thomsen, "Four quadrants integrated transformers for dual-input isolated DC-DC converters," IEEE Trans. Power Electron., Vol. 27, No. 6, 2697-2702, Jun. 2012.
27. Sample, A. P., D. A. Meyer, and J. R. Smith, "Analysis, experimental results, and range adaptation of magnetically coupled resonators for wireless power transfer," IEEE Trans. Ind. Electron., Vol. 58, No. 2, 544-554, Feb. 2011.
28. Liu, X. and G. Wang, "A novel wireless power transfer system with double intermediate resonant coils," IEEE Trans. Ind. Electron., Vol. 63, No. 4, 2174-2180, Apr. 2016.
29. Ha-Van, N. and C. Seo, "Analytical and experimental investigations of omnidirectional wireless power transfer using a cubic transmitter," IEEE Trans. Ind. Electron., Vol. 65, No. 2, 1358-1366, Feb. 2018.