High Efficiency Metamaterial-based Multi-scale Wireless Power Transfer for Smart Home Applications
High Efficiency Metamaterial-based Multi-scale Wireless Power Transfer for Smart Home Applications
复制标题
适用于智能家居应用的高效基于超材料的多尺度无线功率传输
DOI：
10.1109/ims19712.2021.9574860
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Y. Yoon
中科院分区：
文献类型：
--
作者：
Woosol Lee;Y. Yoon
本文提出了一种高效率的多尺度无线功率传输（MSWPT）系统，该系统使用由2×2螺旋单元组成的超材料板，其工作在6.78 MHz（AirFuel Alliance标准频率）的近场WPT和433 MHz（ISM频段，用于智能家居设备）的远场WPT。MSWPT系统被配置为具有利用MTM板大大增强的功率传输效率（PTE），MTM板具有针对两个频带的电磁波聚焦能力。MSWPT系统的原型的设计，制造和特点。在6.78 MHz下，所制造的MSWPT在50 cm距离处的PTE从5.42%增加到50.12%，即增强9.25倍，而在2.5 m距离处的PTE从0.72%增加到3%，即增强4.17倍，其中MTM板在433 MHz下。得出的结论是，从6.78 MHz的近场WPT到433 MHz的远场WPT的过渡是有利的，当距离大于90 cm的MSWPT。
This paper presents a high efficiency multi-scale wireless power transfer (MSWPT) system using a metamaterial slab consisting of 2×2 spiral unit cells, which operates at 6.78 MHz (AirFuel Alliance standard frequency) for near-field WPT and 433 MHz (ISM band for smart home devices) for far-field WPT. The MSWPT system is configured to have the power transfer efficiency (PTE) greatly enhanced with the MTM slab which has an electromagnetic wave focusing capability for both frequency bands. A prototype of the MSWPT system is designed, fabricated, and characterized. The PTE of the fabricated MSWPT at a distance of 50 cm is increased from 5.42 % to 50.12 % with the MTM slabs at 6.78 MHz, i.e. 9.25 times enhancement while the PTE at a distance of 2.5 m is increased from 0.72 % to 3 % with the MTM slabs at 433 MHz, i.e. 4.17 times enhancement. It is concluded that the transition from 6.78 MHz near-field WPT to 433 MHz far-field WPT is advantageous in the MSWPT when the distance is greater than 90 cm.