Efficient wireless power transfer enabled by anti-PT-symmetric nonlinear feedback

作者：Yuqian Wang, Likai Wang, Shengyu Hu, Luyao Wan, Yunhui Li, Yaping Yang, Hong Chen, Zhiwei Guo · 发表于：Newton · 年份：2025 · DOI：10.1016/j.newton.2025.100267 · 被引用次数：6 · 研究领域：Wireless Power Transfer Systems、Energy Harvesting in Wireless Networks、Wireless Body Area Networks

Efficiency and robustness are the fundamental challenges in resonance wireless power transfer (WPT). The application of non-Hermitian physics, particularly parity-time (PT) symmetry, in the field of WPT is currently under intense scrutiny from both theoretical and experimental perspectives. Typically, constructing an N ᵗʰ-order non-Hermitian system requires N coupled resonant coils. Here, we introduce a synthetic dimension via a bypass capacitor in a basic inductor-capacitor circuit, enabling arbitrary-order non-Hermitian WPT using only one resonant coil. As a demonstration, we realize a 3 rd -order anti-PT-symmetric system based on a dual-resonance WPT structure. By incorporating nonlinear saturation gain in the transmitter coil, we achieve nonlinear-feedback-enhanced WPT with adaptive robustness, eliminating the need for active frequency modulation. This approach circumvents the complexity of multiple gain elements and extends the applicability of anti-PT symmetry to long-distance power transfer. Our work represents an alternative pathway to high-performance wave-functional devices. • Single-coil high-order non-Hermitian wireless power transfer • Nonlinear feedback enables adaptive frequency locking • Anti-PT symmetry extends robust power transfer range • Synthetic dimension reduces system size and loss Wireless power transfer (WPT) has the potential to revolutionize applications from medical implants to electric vehicles. However, it faces two major challenges: efficiency ...