94 / 2020-05-23 22:09:04

Wide Input Range Differential RF Energy Harvesting System for Battery-Less RFID Applications

UHF Differential Antenna, Pi-Matching Network, CMOS Rectifier, RF Energy Harvesting, Ultrahigh Frequency (UHF), RFID

Renewable and Sustainable Energy Device and Materials > Energy Harvesting and Transferring Mechanisms

A wide input range differential RF energy harvesting system has been designed and presented for a battery less
UHF 900 MHz RFID applications. The proposed architecture
includes an off-chip UHF differential antenna with pi-matching
network followed by a CMOS cross coupled rectifier for RF-DC
conversion which replaces a battery in several RFID applications.
The proposed differential pi-matching network for the rectifier
provides a peak efficiency of 64% at -14 dBm for an UHF band
(900 MHz). The proposed architecture designed using CMOS
UMC 0.18m technology and achieves better efficiency for lower
input power ranges from -20 dBm to -4 dBm