工作於2.4GHz頻段之無線供電系統設計

The Design of Wireless Power Transmission with Yagi-Uda Antenna for 2.4GHz Band

姜佑樺(You-Hua Jiang)

指導教授 ： 潘宗龍 ； 林偉誠

義守大學/電機資訊學院/電機工程學系/碩士(2016年)

摘要

本論文主要研究於 2.4 GHz 頻段之無線供電系統，乃由於近年來手機使用率及普遍性日漸提高，WLAN無線網路也逐漸普及的情況下，相對的手機耗電量也非常迅速但又不希望另加攜帶行動電源的情況下，有鑒於此此提出以WLAN無線網路作為供電能源的概念。
無線供電中可分兩部分研究，第一部分為天線接收部分，第二部分為電壓整流輸出部分，故文中分兩部分作為研究方向，分別為八單元八木天線之改良，其主要調整八單元八木天線之引向單元間距及長度以改進極化方向成為較高增益的天線，激勵單元的寬度增加又可使天線頻寬較為寬裕，透過網路分析儀量測下可得其2.45GHz反射係數為-40dB，阻抗約為52-j0.1Ω。第二部分整流輸出部分則改善末端之輸出電壓，採2或3階的倍壓電路增加供電的電壓，若直接串接在訊號產生器以14dBm下，其倍壓電路輸出可達11伏特，而在同樣條件下，透過天線輻射接收情況下，且天線與倍壓電路為不匹配之實際測量可達到直流輸出5.2 伏特。

關鍵字

none

並列摘要

In this thesis, in the 2.4 GHz band of Wireless power transmission system, the case in recent years was due to rising mobile phone usage and universality, WLAN Wi-Fi Internet are becoming more common, the relative power consumption of the phone is very fast but do not want action to bring the case plus power supply, in view of the proposed concept to WLAN Wi-Fi as charging energy.

The wireless power transmission system research can be divided into two parts, the first part of the antenna receiving portion, the second part is the rectified voltage output section, so the text in two parts as the research directions were modified eight element Yagi antenna, its major adjustments eight modules Yagi the lead unit and the length of the pitch to improve the polarization direction becomes higher gain antenna to increase the width of the excitation unit and antenna bandwidth can more comfortably through the next network analyzer can measure the reflection coefficient obtaining 2.45GHz - 40dB, impedance is about 52-j0.1Ω. The second part is to improve rectifier output end portion of the output voltage, picking two or three times doubler circuit ,if directly connected in series to at 14dBm signal generator, the voltage doubler circuit which outputs up to 11 V , and in under the same conditions, through the lower reception antenna radiation and antenna and voltage doubler actual measurement does not match up to the DC output of 5.2 volts.

並列關鍵字

none

參考文獻

Low Power 2.45 GHz RF EnergyHarvesting Circuit for Rectenna,

Department of Electrical Engineering and Computer Science, North South

University, 2013 IEEE

Prentice Hall Pearson Education, Inc., 2004

[10] D. K. Cheng, Fundamentals of Engineering Electromagnetics, 1st Ed.,