Premium
Highly efficient differential rectenna for RF energy harvesting
Author(s) -
Chang Yumei,
Zhang Peng,
Wang Lin
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31945
Subject(s) - rectenna , energy conversion efficiency , resistor , power density , electrical engineering , radio frequency , optoelectronics , materials science , rf power amplifier , power (physics) , band pass filter , diode , dbm , dipole , energy harvesting , electronic engineering , engineering , physics , amplifier , voltage , cmos , quantum mechanics
A highly efficient balanced rectenna is proposed in this work. To decrease the sensitive input power density of the rectenna, a rectifying circuit with balanced bandpass filter connects the dipole to the diodes. Using this technique, the proposed rectenna can capture incident RF signal with low power density, that is, when the incident power density P in is 2 mW, the RF‐DC conversion efficiency for our design at 2.45 GHz can remain above 20%, while the best performance happens at P in = 18.5 dBm, which can reach up to 72.3% in simulations. To verify our proposal, a sample is fabricated and measured, and the measured RF‐DC conversion efficiency can reach up to 50% or so when the captured power on the dipole is about 17 dBm and the load resistor is 350 Ω.