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advantage of the multipath channel. What's more, as the bandwidth becomes bigger, their performance is better. As in Figure 9b, because the TR-SCP can make use of CSI based on the diode circuit, its performance will be better than TR system. And when the number of frequency point is from 2 to 8, the system can get more information about CSI. Therefore, in Figure 9b, the TR-SCP system will be better

Percentage of captured energy versus the number of significant eigenvalues with a single antenna [14].

This chapter firstly introduces the principle of TR technique. Then according to the focusing effect of TR, we propose TR be applied to WPT. Because the conversion efficiency is associated with the waveform, we propose SCP algorithm based on diode circuit to design the amplitude of the emitting signal. Finally, we combine the SCP with the TR to propose a SCP-TR system model. Based on the results of the simulation, our design model can achieve better performance on wireless power transmission. Therefore, we believe that our model is robust and stable in a complex

and better than the TR system as the number increases.

Result of the simulation (a) power and bandwidth (b) power and frequency points.

4. Conclusion

100

Figure 9.

Figure 8.

Recent Wireless Power Transfer Technologies

Bin-Jie Hu\*, Zhi-Wu Lin and Peng Liao School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China

\*Address all correspondence to: eebjiehu@scut.edu.cn

© 2019 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.
