本文關鍵詞：基于回復式反射和近場聚焦的無線能量傳輸系統(tǒng)設計　出處：《南京航空航天大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 微波無線能量傳輸 回復式反射 導航信號 射頻整流 近場聚焦

【摘要】：近年來,隨著各種便攜式、植入式電子設備的不斷涌現(xiàn)以及新興的物聯(lián)網、人體局域網等技術領域的快速發(fā)展,移動電子設備無線供電的需求不斷增長。微波無線能量傳輸是解決中遠距離無線供電的一種可行方案。然而,由于電磁波傳播過程中存在空間輻射損耗,微波無線供能存在傳輸效率低和安全性差的問題。針對上述兩個問題,本文提出并研究基于回復式反射和近場聚焦的微波無線能量傳輸技術方案。該方案采用回復式反射天線陣列技術,形成能夠跟蹤和聚焦于目標設備的功率窄波束,以提供對移動電子設備的高效率跟蹤供電;引入分布式天線近場聚焦的概念和方法,在提高能量傳輸效率的同時,減小遠場輻射增益,以避免對人體安全的危害和對周邊其它電子系統(tǒng)的干擾。論文工作的具體內容包括:(1)綜合研究了回復式反射結構的實現(xiàn)技術,并在此基礎上采用共軛相位反向波束控制技術,設計了基于回復式反射的微波無線能量傳輸系統(tǒng)架構。在該系統(tǒng)架構中,能量發(fā)射端接收到移動電子設備發(fā)送的導航信號后,經下變頻、模數(shù)轉換和數(shù)字信號處理分析,獲取發(fā)射天線陣列各單元所需的共軛相位信息,然后采用數(shù)字控制電路控制發(fā)射天線單元的饋電相位,實現(xiàn)微波波束對移動電子設備的跟蹤供電。(2)在上述系統(tǒng)架構的基礎上,設計實現(xiàn)了發(fā)射端天線陣列、導航信號分析模塊、反向波束控制軟件以及接收端整流天線,搭建了一套回復式反射無線能量傳輸實驗演示系統(tǒng),成功的實現(xiàn)了對1.5m距離外的移動目標進行跟蹤供電。(3)研究并設計實現(xiàn)了基于分布式天線陣列的近場聚焦實驗驗證系統(tǒng),該系統(tǒng)的能量發(fā)射端由兩個四單元的天線陣列組成,兩個天線陣列相隔一定的距離,呈分布式擺放。天線陣列各單元根據(jù)回復式反射原理協(xié)同產生聚焦于目標設備的功率波束。仿真和實測結果表明,該分布式天線陣列近場聚焦系統(tǒng)能夠在一定范圍內形成聚焦于目標設備的電磁場分布,減小目標位置以外區(qū)域的電磁場功率密度分布。
[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.

【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM724
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本文編號：1419598