用于射频能量采集系统的四频段矩形天线

D. Elsheakh, Mina Farouk, H. Elsadek, H. Ghali
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引用次数: 1

摘要

本文介绍了用于射频能量采集应用的多频带微带矩形天线的设计。所设计的天线在GSM-900/1800、WiFi和WLAN频段具有良好的性能。此外,整流器电路设计在多谐振频率下,以从不同的RF源收集最大量的RF环境功率。所开发的天线与整流器在四个所需频率下匹配,使用几个整流器分支来收集最大的RF功率。所提出的矩形天线被印刷在具有修改的接地平面的FR4基板上,以获得合适的阻抗带宽。所提出的天线由带短截线的椭圆辐射平面和阶梯式改进接地平面组成。使用HSMS-2850肖特基二极管,矩形天线在(GSM 900/1800、WiFi和WLAN频带)的四频带上谐振,在0dBm输入功率下,整流器功率转换效率高达56.4%。通过使用SMS-7630-061肖特基二极管,效率得到了更大的提高,该二极管的特征在于低结电容和低阈值电压,以在相同的0dBm输入功率下,对于相同的谐振频带,实现高达71.1%的更高转换效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quad-Band Rectenna for RF Energy Harvesting System
The design of multiband microstrip rectenna for radio frequency energy harvesting applications is presented in this paper. The designed antenna has good performance in the GSM-900/1800, WiFi and WLAN bands. In addition, the rectifier circuit is designed at multi resonant frequencies to collect the largest amount of RF ambient power from different RF sources. The developed antenna is matched with the rectifier at four desired frequencies using several rectifier branches to collect the largest of RF power. The proposed rectenna is printed on FR4 substrate with modified ground plane to achieve suitable impedance bandwidth. The proposed antenna consists of elliptical radiating plane with stubs and stepped modified ground plane. The rectenna resonates at quad frequency bands at (GSM 900/1800, WiFi band and WLAN bands) with rectifier power conversion efficiency up to 56.4% at 0 dBm input power using the HSMS-2850 Schottky diode. The efficiency is more enhanced by using SMS-7630-061 Schottky diode which is characterized by a low junction capacitance and a low threshold voltage to achieve higher conversion efficiency up to 71.1% at the same 0 dBm input power for the same resonating frequency band.
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