电波科学学报2017，Vol.32Issue(4)：403-409,7.DOI:10.13443/j.cjors.2017072401
宽带圆极化整流天线的研究与设计
Research and design of broadband circularly polarized rectenna
摘要
Abstract
A broadband circularly polarized rectifying antenna (rectenna) for the micro-radio energy harvesting in space,which consists of a radio frequency (RF) energy receiving antenna and a multi-band rectifying circuit is proposed in this paper.The log periodic cross dipole is used to obtain wideband characteristics on the radiation patch of the receiving antenna.At the same time,two pairs of orthogonal crossed dipoles are connected by a curved 90 degree phase delay line,which is aim to achieve the circular polarization characteristics of the antenna.The multi-band rectifying circuit is composed of two single-stage voltage doubler rectifying circuit.A new impedance matching circuit with two branches is introduced to improve the performance and efficiency of the rectifying circuit in parallel.The simulation results show that the impedance bandwidth and the 3 dB axial ratio bandwidth of the receiving antenna are 1100 MHz and 350 MHz respectively.The power sensitivity of multi-band rectifying circuit reaches-35 dBm,and the maximum RF-DC conversion efficiency is up to 76.5％.The measured output voltage of the rectenna is about 139 mV when the radiation intensity is 6.02 μT and the value of load resistor is 700 Ω,so it is suitable for low power RF energy harvesting applications.关键词
射频能量收集/整流天线/对数周期天线/多频整流电路/转换效率Key words
RF energy harvesting/rectenna/log periodic antenna/multi band rectifying circuit/conversion efficiency分类
信息技术与安全科学引用本文复制引用
郝宏刚,倪星瑞,龚见国,黄文,陈海雷,杜世淼..宽带圆极化整流天线的研究与设计[J].电波科学学报,2017,32(4):403-409,7.基金项目
重庆市教育委员会科学和技术研究项目(kj1400417) （kj1400417）
