As a power supply method with high spatial freedom, megahertz (MHz) wireless power transfer (WPT) has great potential in particular application fields. The role and importance of WPT are described from the perspective of interdisciplinary. This article starts with WPT systems’ performance at different frequencies, emphasizes the basic composition and working principle of MHz systems, and focuses on a comprehensive review of recent years on inverters, rectification, impedance compression, dynamic impedance matching, coupling structure design, and multiload model establishment. Meanwhile, different technologies are summarized, compared, and classified. Current challenges and future development trends are discussed.

中文翻译：

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兆赫无线功率传输概述


作为一种空间自由度高的供电方式，兆赫兹（MHz）无线输电（WPT）在特定应用领域具有巨大潜力。从跨学科的角度阐述了WPT的作用和重要性。本文从WPT系统在不同频率下的性能入手，强调MHz系统的基本组成和工作原理，重点对近年来逆变器、整流、阻抗压缩、动态阻抗匹配、耦合结构设计、多负载等方面的研究进行全面回顾。模型建立。同时对不同的技术进行了总结、比较和分类。讨论了当前的挑战和未来的发展趋势。