A Dual-Band Negative Permeability and Near-Zero Permeability Metamaterials for Wireless Power Transfer System
A Dual-Band Negative Permeability and Near-Zero Permeability Metamaterials for Wireless Power Transfer System
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DOI：
10.1109/tie.2020.3009608
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发表时间：
2021-08-01
影响因子：
7.7
通讯作者：
Liu, Minghai
中科院分区：
文献类型：
--
作者：
Lu, Conghui;Huang, Xiutao;Liu, Minghai
非接触式充电平台是一项新兴技术，可以提高电子充电设备的便利性。本文提出了一种集成两种双频超材料的新型非对称无线功率传输（WPT）系统，适用于便携式电子设备充电。超材料的设计关键是实现双频负磁导率（DB-MNG）和近零磁导率（DB-MNZ），以同时提高WPT系统的效率和减少漏磁场。特别是，进行了相应的仿真和实验，验证了DB-MNG超材料在13.56和27.12 MHz下提高效率的有效性。此外，考虑到便携式设备的充电环境，讨论了设备和 DB-MNG 超材料之间的各种错位，以保持持续的电力可用性。同时，在13.56和27.12 MHz下证明了DB-MNZ超材料的双频屏蔽性能。因此，DB-MNZ超材料屏蔽的性能优于铁氧体片，其性能与铝片相似。
A contactless energy charging platform is an emerging technology that can improve the conveniences of electronic charging devices. This article presents a novel asymmetric wireless power transfer (WPT) system by integrating with two kinds of dual-band metamaterials, which is suitable for recharging the portable electronic devices. The design key of the metamaterial is to achieve the dual-band negative permeability (DB-MNG) and near-zero permeability (DB-MNZ) for enhancing efficiency and reducing leakage magnetic field of the WPT system, simultaneously. Especially, the corresponding simulation and experimentation are carried out to verify the validity of the DB-MNG metamaterial for increasing the efficiency at 13.56 and 27.12 MHz. Moreover, considering the charging environment of portable devices, various misalignments between the device and DB-MNG metamaterial are discussed to maintain continuous power availability. Meanwhile, the dual-band shielding performance of DB-MNZ metamaterial is proved at 13.56 and 27.12 MHz. As a result, the DB-MNZ metamaterial shield performs better than ferrite sheet and its performance is similar to that of aluminum sheet.