Boursianis Achilles D, Papadopoulou Maria S, Koulouridis Stavros, Rocca Paolo, Georgiadis Apostolos, Tentzeris Manos M, Goudos Sotirios K
ELEDIA Research Center, ELEDIA@AUTH, School of Physics, Aristotle University of Thessaloniki, 54 124 Thessaloniki, Greece.
Electrical and Computer Engineering Department, University of Patras, 26 504 Patras, Greece.
Sensors (Basel). 2021 May 16;21(10):3460. doi: 10.3390/s21103460.
A triple-band single-layer rectenna for outdoor RF energy applications is introduced in this paper. The proposed rectenna operates in the frequency bands of LoRa, GSM-1800, and UMTS-2100 networks. To obtain a triple-band operation, a modified E-shaped patch antenna is used. The receiving module (antenna) of the rectenna system is optimized in terms of its reflection coefficient to match the RF-to-DC rectifier. The final geometry of the proposed antenna is derived by the application of the Moth Search Algorithm and a commercial electromagnetic solver. The impedance matching network of the proposed system is obtained based on a three-step process, including the minimization of the reflection coefficient versus frequency, as well as the minimization of the reflection coefficient variations and the maximization of the DC output voltage versus RF input power. The proposed RF-to-DC rectifier is designed based on the Greinacher topology. The designed rectenna is fabricated on a single layer of FR-4 substrate. Measured results show that our proposed rectenna can harvest RF energy from outdoor (ambient and dedicated) sources with an efficiency of greater than 52%.
本文介绍了一种用于户外射频能量应用的三频段单层整流天线。所提出的整流天线工作在LoRa、GSM - 1800和UMTS - 2100网络的频段。为实现三频段工作，采用了一种改进的E形贴片天线。整流天线系统的接收模块（天线）在反射系数方面进行了优化，以匹配射频到直流整流器。所提出天线的最终几何结构是通过应用蛾类搜索算法和商业电磁求解器得出的。所提出系统的阻抗匹配网络基于一个三步过程获得，包括反射系数随频率的最小化，以及反射系数变化的最小化和直流输出电压相对于射频输入功率的最大化。所提出的射频到直流整流器基于Greinacher拓扑结构设计。所设计的整流天线制作在单层FR - 4基板上。测量结果表明，我们所提出的整流天线能够从户外（环境和专用）源收集射频能量，效率大于52%。
