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射频能量收集的小型化双频整流天线设计
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TP393

基金项目:

国家自然科学基金资助项目（61772432，61772433）。


Design and implementation of compact dual-band rectenna for RF energy harvesting
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    摘要:

    针对传统的双频整流天线转换效率不高的问题，提出了一种用于射频（RF，radio frequency）能量收集的双频整流天线。其工作频段为1.75 GHz和2.45 GHz，主要由接收天线、阻抗匹配电路、二倍压整流电路和负载电路组成。基于小型化双频天线，引入一种新型双频阻抗匹配网络，以提高整流电路在较低输入功率下的射频-直流（RF-DC）转换效率。此外，采用新型阻抗匹配网络使得整流电路复杂度得以降低，减小了能量损耗。与传统的双频整流天线相比，-10 dBm输入功率条件下，在普通室内环境中新型双频整流天线具有更高的RF-DC转换效率。实验结果显示，在1.75 GHz GSM频段和2.45 GHz WLAN频段上最大RF-DC转换效率分别可以达到65.34%和54.3%。测试结果证明，其可以在物联网低功耗设备中得以应用。

    Abstract:

    A dual-band rectenna for radio frequency (RF) energy harvesting was proposed in view of the problem of low conversion efficiency of traditional dual-band rectenna. The rectenna is mainly composed of receiving antenna, an impedance matching circuit, a double voltage rectifier and a load circuit. Based on the miniaturized dual-band antenna, a new dual-band impedance matching network was introduced to improve the RF-DC conversion efficiency of the rectifier at a lower input power. In addition, the new impedance matching network reduces the complexity of the rectifier. Compared with traditional dual-band rectenna, the novel dual-band rectenna has higher RF-DC conversion efficiency in indoor environment for an incident power of -10dBm. The experimental results show that the RF-DC conversion efficiency reach 65.34% and 54.3% in 1.75GHz GSM band and 2.45GHz WLAN band, respectively. And the rectenna can be used in Internet of Things (IoT) low power devices.

    参考文献
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周晓萌,郭松涛.射频能量收集的小型化双频整流天线设计[J].重庆大学学报,2018,41(11):66-75.

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  • 收稿日期:2018-02-11
  • 在线发布日期: 2018-12-01
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