Design and Ezperiment of a Loop Rectenna for RFID Wireless Power Transmission and Data Communication Applications
This paper presents a low-cost rectifying antenna (rectenna) has been developed and measured at 900-950MHz (Radio Frequency Identification Device, RFID band) for low-power applications involving wireless power transmission (WPT) and data communication. In order to validate the rectenna, we have been developed a loop antenna which was photo-etched from copper-clad FR-4 material (εr=4.4) with the volume of 60×80×0.8mm3. The loop antenna used a meander line structure to reduce its size to 50％ of the regular loop antenna and measured operating frequency of 925MHz with bandwidth of 52MHz at return loss -10 dB. The maximum antenna gain is 4.22 dBi and radiation efficiency is 97％ at 925 MHz. Results show the satisfactory agreement for the loop antenna design to meet the RFID specifications. Furthermore, to contribute a rectenna for RF power conversion, the back side of the loop antenna is the doubler rectifier circuit with input filter for efficiency optimization and rejects higher order harmonics produced by the rectifying diode. For the Schottky diode we used the commercial Agilent HSMS-285C surface mount zero bias schottky detector diode pair for small signal applications at frequencies below 1.5 GHz was used as the rectifying device, and there are two diodes are mounted into a single package to be the best in reduce the size and the efficiency. In addition, the rectenna has a RF-DC conversion efficiency of 47％ is achieved when 0dBm RF power is received at 925 MHz. Measured results of rectenna proved that the rectenna is suitable for component of the WPT system.
R.H.Chen Y.C.Lee J.S.Sun
Graduate Institute of Computer and Communication Engineering National Taipei University of Technology Taipei,Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2009(2009年电磁学研究新进展学术研讨会)(PIERS 2009)
北京
英文
528-531
2009-03-23（万方平台首次上网日期，不代表论文的发表时间）