Uniform and constant long-time wireless power transmission of multi-targets in local space based on time reversal

Zhang Zhi-Yuan , Li Bing , Liu Shi-Qi , Zhang Hong-Lin , Hu Bin-Jie , Zhao De-Shuang , Wang Chu-Nan 在局域有限空间中, 如何保证电磁能量的多目标精准均匀恒定无线传输是亟待解决的科学难题. 本文针对此难题, 以具有时空聚焦特性的时间反演技术为基础, 提出一种自动区域选择信道匹配的恒定均匀无线输能方法. 该方法不仅能够依据多径信号的贡献率, 自适应性地补偿不同目标处的信道差异, 还可以利用距离系数动态划分时间反演镜阵元的工作范围, 降低不同目标间的相互影响. 在提高能量聚焦精度的同时, 解决微波无线输能(microwave power transmission, MPT)中多目标能量非均匀传输的问题, 从而实现长时间恒定的多目标均匀MPT. 时间反演镜 /  自动区域选择信道匹配 /  微波输能 /  The precise, uniform and constant wireless transmission of electromagnetic power to multiple targets in a local finite space is a scientific problem to be solved urgently. Aiming at this problem, in this paper we propose an automatic zone selection channel matching method based on time reversal technique which has the spatiotemporal focusing characteristics. The proposed method can not only adaptively compensate for the channel differences at different targets based on the contribution rate of the multipath signals, but also dynamically divide the working range of the time reversal mirror elements to eliminate the mutual influences between different targets through the use of the distance coefficient. While improving the accuracy of energy focusing, the proposed method also solves the problem that non-uniform microwave power transmission (MPT) of multiple targets, and therefore achieving the constant, uniform and long-time MPT of multi-targets. Keywords: time reversal mirror /  automatic zone selection channel matching /  microwave power transmission /  uniform power transmission 张双, 贺三军, 廖峰, 罗万, 周芷千, 高波, 刘丽艳, 赵修良. 基于Boosted-Gold算法的γ能谱反演分析 . 物理学报, 2022, 71(10): 102901. doi: 10.7498/aps.71.20212429 宋建军, 张龙强, 陈雷, 周亮, 孙雷, 兰军峰, 习楚浩, 李家豪. 基于晶向优化和Sn合金化技术的一种2.45 G弱能量微波无线输能用Ge基肖特基二极管 . 物理学报, 2021, 70(10): 108401. doi: 10.7498/aps.70.20201674 曹汝楠, 徐飞, 朱佳斌, 葛升, 王文贞, 徐海涛, 徐闰, 吴杨琳, 马忠权, 洪峰, 蒋最敏. 平面型钙钛矿太阳能电池温度相关的光伏性能时间响应特性 . 物理学报, 2016, 65(18): 188801. doi: 10.7498/aps.65.188801 宋天明, 易荣清, 崔延莉, 于瑞珍, 杨家敏, 朱托, 侯立飞, 杜华冰. ICF实验软X射线能谱仪对辐射能流时间关联测量的时标系统 . 物理学报, 2012, 61(7): 075208. doi: 10.7498/aps.61.075208