Home > Published Issues > 2021 > Volume 16, No. 2, February 2021 >

Self-Adaptive Rectenna with High Efficiency over a Wide Dynamic Range for RF Energy Harvesting Applications

Eman M. Abdelhady 1, Hala M. Abdelkader 2, and Amr A. Al-Awamry 1
1. Benha University, 13512 Benha, Egypt
2. Benha University, 11629 Shoubra, Egypt

Abstract—This paper presents a novel simple adaptive and efficient rectenna with automatic power distribution to achieve high radio frequency-direct current (RF-DC) power conversion efficiency (PCE) over a wide range of RF input power. This design employs two rectifier paths operating at low and high-power levels, respectively. Automatic power distribution method exploits the power-dependent input impedance of the rectifier and routes the RF input power into the assigned path according to the input power level. A distinctive enhancement in the rectifier dynamic range is achieved when dividing the high path power equally into two or more parallel diode cells, which helps the high path to camouflage the diode breakdown voltage in case of high input power level. The proposed adaptive design applies two different rectifier topologies, one by using shunt diode topology and the other by using voltage doubler topology at 2.45 GHz. Simulated PCE of this work is kept above 50% over a range of 25.1 dBm from -5.7 to 19.4 dBm of RF input power using shunt diode topology and over a range of 30 dBm from -6.3 to 23.7 dBm of RF input power using voltage doubler topology.
Index Terms—RF energy harvesting, rectifier, automatic power distribution, power conversion efficiency

Cite: Eman M. Abdelhady, Hala M. Abdelkader, and Amr A. Al-Awamry, "Self-Adaptive Rectenna with High Efficiency over a Wide Dynamic Range for RF Energy Harvesting Applications," Journal of Communications vol. 16, no. 2, pp. 67-75, February 2021. Doi: 10.12720/jcm.16.2.67-75

Copyright © 2021 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.