Fano共振效应对无线能量传输空间电磁场的调控特性  

Fano Resonance Effect on Modulation of Spatial Electromagnetic Field for Wireless Power Transfer

作　　者：魏奕浩 蒙源泓 陈丽娜 陈永强 苏晓强 刘艳红[1,2] 董丽娟[1,2] Wei Yihao;Meng Yuanhong;Chen Lina;Chen Yongqiang;Su Xiaoqiang;Liu Yanhong;Dong Lijuan(Institute of Solid State Physics,Shanxi Datong University,Datong 037009,Shanxi,China;Shanxi Province Key Laboratory of Microstructure Electromagnetic Functional Materials,Shanxi Datong University,Datong 037009,Shanxi,China;Key Flow Laboratory of Micro and Nano Heat Fluid Technology and Energy Application,Suzhou 215009,Jiangsu,China;School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China)

机构地区：[1]山西大同大学固体物理研究所,山西大同037009 [2]山西大同大学微结构电磁功能材料省市共建山西省重点实验室,山西大同037009 [3]江苏省微纳热流技术与能源应用重点实验室,江苏苏州215009 [4]苏州科技大学物理科学与技术学院,江苏苏州215009

出　　处：《光学学报》2024年第20期253-259,共7页Acta Optica Sinica

基　　金：中央引导地方科技发展资金(YDZJSX2021B011);山西省基础研究计划基金(202203021211328);大同市平台项目(2023086)。

摘　　要：通过一种四臂螺旋表面结构将Fano共振效应引入双线圈无线能量传输系统中,利用Fano共振的局域性调控该无线能量传输系统的空间电磁场。研究结果表明,将四臂螺旋表面结构与双线圈结构有效结合,可以实现Fano共振效应,通过Fano共振的局域性对双线圈之间的空间电磁场进行调控,可大大提升无线能量传输系统的传输效率。四臂螺旋表面结构屏蔽了近磁场在反传输方向上的能量传播,提升了空间电磁场能量。该表面结构简单且易于集成,为无线充电技术提供了一种高效率的传输方案。Objective As a cablefree energy transmission method,wireless power transfer(WPT)offers significant advantages over wired transmission in terms of safety and applicability.It boasts features such as contactless operation,flexibility,convenience,and wide applicability,making it suitable for diverse fields.However,challenges such as transmission distance,efficiency,and device size limit its widespread application.To address issues like bulky device size and low efficiency in WPT systems,we propose the integration of a fourarmed helical surface structure into a dualcoil WPT system in this study.This design aims to enhance both transmission efficiency and distance.The structure’s simplicity and compactness notably reduce the size of WPT devices,thereby expanding the feasibility of wireless charging for small equipment.Methods We first simulate and optimize the parameters of the proposed fourarmed helical surface structure using 3D electromagnetic simulation software.Subsequently,we experimentally verify the effect of this structure on optimizing the transmission efficiency and increasing the transmission distance of the dualcoil WPT.In addition,the dualcoil WPT system with the fourarmed helical surface structure is analyzed using the Fano resonance principle,which explains the physical mechanism underlying the enhanced transmission efficiency.Finally,to further elucidate the role of spatial field regulation in this system,we simulate and calculate the electromagnetic field during the transmission process,and utilize magnetic field distribution diagrams to illustrate changes in the spatial field.Results and Discussions The designed fourarmed helical surface structure is integrated with a dualcoil system at nearfield transmission distances,which greatly reduces the structure size.By incorporating the fourarmed helical surface structure,the broadband transmission mode between the transmitting coil and the receiving coil[Fig.7(b)],and the narrowband resonance mode between the resonant surface and the transmitting coil[F

关 键 词：无线能量传输 Fano共振 传输效率 四臂螺旋表面结构 

分 类 号：O451[理学—无线电物理]