期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 69, 期 7, 页码 7481-7490出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3102453
关键词
Cavity resonators; Wireless communication; Receivers; Wireless power transfer; Couplings; Magnetic fields; Safety; Cavity resonance wireless power transfer (CR WPT); three-dimensional (3-D) transfer; wall-meshed cavity resonator; wireless power and information transfer
资金
- National Natural Science Foundation of China [61501086, 61671133]
- Open Fund Project of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing [GXKL06190206]
- Sichuan Applied Basic Research Project [19YYJC0025]
In this paper, a wall-meshed cavity resonator is proposed to address the issue of wireless communication signal blocking in traditional cavity resonance wireless power transfer (CR WPT). The proposed system can achieve simultaneous wireless power transfer in the cavity and wireless communications with outside, with a high power transfer efficiency.
In order to address the issue of wireless communication signal blocking in the traditional cavity resonance wireless power transfer (CR WPT), a wall-meshed cavity resonator constructed of the meshed metallic walls is proposed together with an analytical design method. This cavity resonator can not only generate and confine the electromagnetic waves of natural resonant modes inside the cavity resonator, but also support wireless communications with outside. The wall-meshed cavity resonator is analytically designed by the known theoretical equations without time-consuming optimizations and verified by electromagnetic simulations and experiments. The results show that the proposed CR WPT system can achieve simultaneous wireless power transfer in the cavity and wireless communications with outside. The maximum power transfer efficiency is higher than 85%. The power transfer efficiency exceeds 60% within about 70% areas inside the wall-meshed cavity. For wireless communication signals passing through the wall-meshed cavity, the attenuation at 2.1 GHz (4G), 2.45 GHz (Wi-Fi), and 3.5 GHz (5G) is about 6.0, 5.1, and 3.8 dB, respectively. Additionally, the safety performance of the proposed CR WPT system is numerically investigated by the specific absorption rate analysis of a human torso model.
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