基于回复式反射和近场聚焦的无线能量传输系统设计

发布时间：2018-01-13 16:17

  本文关键词：基于回复式反射和近场聚焦的无线能量传输系统设计　出处：《南京航空航天大学》2014年硕士论文　论文类型：学位论文

  更多相关文章： 微波无线能量传输 回复式反射 导航信号 射频整流 近场聚焦

【摘要】：近年来,随着各种便携式、植入式电子设备的不断涌现以及新兴的物联网、人体局域网等技术领域的快速发展,移动电子设备无线供电的需求不断增长。微波无线能量传输是解决中远距离无线供电的一种可行方案。然而,由于电磁波传播过程中存在空间辐射损耗,微波无线供能存在传输效率低和安全性差的问题。针对上述两个问题,本文提出并研究基于回复式反射和近场聚焦的微波无线能量传输技术方案。该方案采用回复式反射天线阵列技术,形成能够跟踪和聚焦于目标设备的功率窄波束,以提供对移动电子设备的高效率跟踪供电;引入分布式天线近场聚焦的概念和方法,在提高能量传输效率的同时,减小远场辐射增益,以避免对人体安全的危害和对周边其它电子系统的干扰。论文工作的具体内容包括:(1)综合研究了回复式反射结构的实现技术,并在此基础上采用共轭相位反向波束控制技术,设计了基于回复式反射的微波无线能量传输系统架构。在该系统架构中,能量发射端接收到移动电子设备发送的导航信号后,经下变频、模数转换和数字信号处理分析,获取发射天线阵列各单元所需的共轭相位信息,然后采用数字控制电路控制发射天线单元的馈电相位,实现微波波束对移动电子设备的跟踪供电。(2)在上述系统架构的基础上,设计实现了发射端天线阵列、导航信号分析模块、反向波束控制软件以及接收端整流天线,搭建了一套回复式反射无线能量传输实验演示系统,成功的实现了对1.5m距离外的移动目标进行跟踪供电。(3)研究并设计实现了基于分布式天线阵列的近场聚焦实验验证系统,该系统的能量发射端由两个四单元的天线阵列组成,两个天线阵列相隔一定的距离,呈分布式摆放。天线阵列各单元根据回复式反射原理协同产生聚焦于目标设备的功率波束。仿真和实测结果表明,该分布式天线阵列近场聚焦系统能够在一定范围内形成聚焦于目标设备的电磁场分布,减小目标位置以外区域的电磁场功率密度分布。
[Abstract]:In recent years, with the emergence of a variety of portable and implantable electronic devices and the newly emerging things, the rapid development of technology in the field of human LAN, mobile electronic devices, wireless power supply demand continues to grow. The microwave wireless power transmission is a feasible solution for middle or long distance wireless electricity. However, due to the existence of space electromagnetic wave radiation loss in the process of communication, microwave wireless power supply has low transmission efficiency and poor safety. To solve the above two problems, this paper puts forward and studies the return type of reflection and focusing in the near field microwave wireless power transmission technology. The scheme adopts the recovery scheme based on reflective antenna array technology, power to track and focus on the target device the narrow beam, in order to provide efficient tracking of the mobile electronic device power supply; the introduction of distributed antenna near field focus on the concepts and methods in improving energy The amount of transmission efficiency and reduce the radiation gain, to avoid harm to human safety and interference of other surrounding electronic systems. The main contents of this paper include: (1) the comprehensive study of the implementation of reflective structure response, and on the basis of the conjugate phase reverse beam control technology, the design of the microwave wireless power transmission system architecture return type based on reflection. In the system architecture, the energy transmitter receives the navigation signal sent by the mobile electronic device, down conversion, analog digital conversion and digital signal processing and analysis, obtain the conjugate phase information of each unit transmitting antenna array is required, then the digital control circuit to control the feeding phase the transmitting antenna unit, power microwave beam tracking for mobile electronic devices. (2) based on the system architecture, design and implementation of the transmitter antenna array, guide Navigation signal analysis module, reverse beam control software and the receiving end rectifying antenna, a set of reply reflective wireless power transmission demonstration system, the successful implementation of the moving target on the 1.5m distance of tracking power. (3) research and design of near-field focusing experiment system of distributed antenna array based on the energy transmitter consists of two antenna array unit four of the system, two antenna arrays separated by a certain distance, is placed in each unit. The distributed antenna array according to the power beam return type reflection principle synergistically to focus on the target device. Simulation and experimental results show that the electromagnetic field distribution of the distributed antenna array near field the focusing system can in a certain range form focus on the target device, reduce the power density distribution of electromagnetic field outside the target position.

【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724
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本文编号：1419598