基于近场聚焦和时间反转跟踪的无线能量传输新型体系结构研究

项目名称： 基于近场聚焦和时间反转跟踪的无线能量传输新型体系结构研究

项目编号： No.61471195

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 王薪

作者单位： 南京航空航天大学

项目金额： 80万元

中文摘要： 针对射频识别、无线传感/监控、以及各类移动电子设备等领域对中远距离无线供电的需求，提出并研究基于近场聚焦和时间反转跟踪的新型无线能量传输体系结构。围绕现有射频无线能量传输技术存在的效率低、安全性能差、成本高、体积大等问题，引入分布式天线近场聚焦的概念和方法，提高能量传输效率，避免对人体安全的危害和对周边电子系统的干扰；采用回复式反射天线阵列技术，跟踪和定位移动目标，排除实际应用中障碍物干扰；采用窄脉冲作为导航信号，提出导航信号的傅立叶分析电路设计，降低系统功耗和成本；开展新型天线、新型时域匹配网络和新型微波整流电路等设计研究，探索提高系统效率、减小系统尺寸和重量，以及系统集成化的实现途径。本项目的研究将提供通过射频波束近场聚焦实现高效率、安全可靠的能量传输的理论基础、设计方法、和实验演示系统，为我国物联网、人体局域网等新兴产业的发展提供技术支持和储备。

中文关键词： 无线能量传输；近场聚焦；时间反转；微波整流；电波传播

英文摘要： To meet the emerging demand for middle-to-distant range wireless power transmission in applications such as Radio-Frequency-Identification (RFID), wireless sensing/monitoring and mobile electronic devices, a new architecture for wireless power transmission based on near-field focusing and time-reversal tracking is proposed in this project. The proposed architecture addresses problems of existing wireless power transmission techniques including low efficiency, potential hazard to human health, high cost, large size and heavy weight. The concept and design of near-field focusing using distributed antenna arrays are proposed to improve power transmission efficiency and avoid potential health hazards/interference. Retro-reflective antenna arrays are employed for tracking and localizing targets. Narrow pulses are adopted as pilot signals, which are analyzed by Fourier transform circuits with low cost and low power consumption. Novel antennas, time-domain matching networks, and microwave rectification circuits will be investigated to further improve the system efficiency, reduce system size and weight, as well as to facilitate system integration. This project aims at providing the theory foundation, design methodology and experimental demonstration systems for a highly efficient, safe and reliable power transmission technique through RF beamforming. The outcome of the project are expected to significantly promote the future development of related areas including the internet of things and body area network.

英文关键词： Wireless-power-transmission;Near-field-focusing;Time-reversal;Microwave-rectification;Electromagnetic wave propagation