Novel L-Slot Matching Circuit Integrated with Circularly Polarized Rectenna for Wireless Energy Harvesting
Novel L-Slot Matching Circuit Integrated with Circularly Polarized Rectenna for Wireless Energy Harvesting
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DOI：
10.3390/electronics8060651
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发表时间：
2019-06-01
期刊：
影响因子：
2.9
通讯作者：
Kanaya, Haruichi
中科院分区：
文献类型：
--
作者：
Mansour, Mohamed M.;Kanaya, Haruichi
射频（RF）功率收集允许同时向若干远程RF设备进行无线功率输送。本文介绍了一种紧凑、可靠、有效和灵活的能量收集（EH）整流天线设计的实现。它集成了一个简单的整流器电路和一个2.45 GHz工业、科学、医疗（ISM）频段的圆极化单侧缝隙偶极天线，可在1至95 mu W/cm（2）的低入射功率密度下进行无线充电。整流天线结构被印刷在单层、低成本、商业FR 4基板上。整流器和天线的集成产生低轮廓和高性能的圆极化整流天线。为了最大限度地提高系统效率，整流器和天线之间引入的匹配电路被优化为最小数量的分立元件，它是使用多个L-槽缺陷在接地平面构造。当输入功率为-6dBm，天线增益为3dBi时，射频-直流（RF-DC）转换效率为59.5%。整流天线尺寸为41 x 35.5 mm（2）。结果表明，在相同的环境条件下，所提出的整流天线的输出功率高于其他已公布的设计具有类似的天线尺寸。由于其紧凑的尺寸，所提出的整流天线为无线能量充电找到了一系列潜在的应用。
Radio frequency (RF) power harvesting allows wireless power delivery concurrently to several remote RF devices. This manuscript presents the implementation of a compact, reliable, effective, and flexible energy harvesting (EH) rectenna design. It integrates a simple rectifier circuit with a circularly polarized one-sided slot dipole antenna at 2.45 GHz Industrial, Scientific, Medical (ISM) frequency band for wireless charging operation at low incident power densities, from 1 to 95 mu W/cm(2). The rectenna structure is printed on a single layer, low cost, commercial FR4 substrate. The integration of the rectifier and antenna produces a low-profile and high performance circularly polarized rectenna. In order to maximize the system efficiency, the matching circuit introduced between the rectifier and antenna is optimized for a minimum number of discrete components and it is constructed using multiple of L-slot defects in the ground plane. For a given input power of -6 dBm intercepted by the circularly polarized antenna with 3 dBi gain, the peak RF-DC (radio frequency-direct current) conversion efficiency is 59.5%. The rectenna dimensions are 41 x 35.5 mm(2). It is demonstrated that the output power from the proposed rectenna is higher than the other published designs with a similar antenna size under the same ambient condition. Thanks to its compact size, the proposed rectenna finds a range of potential applications for wireless energy charging.