Design and experiment of RF rectifiers for wireless power transmission
Résumé
This paper presents the design and experiment of series mounted diode rectifier and single stage voltage doubler rectifier at 2.45GHz for applications involving microwave power transmission. Input matching circuit and harmonics filtering at both the input and output have been optimized for high efficiency operation. The series topology is dedicated to low input power conversion. Measurement results show that 40% and 27% RF-DC conversion efficiency are achieved for 0 dBm and -5 dBm input power respectively at 2.45GHz. A maximum efficiency of 54% is obtained for an input power of 12 dBm and a 3V output DC voltage is measured at a 1KΩ DC load when the rectifier is matched to 50Ω. The voltage doubler structure is aimed for high input power conversion and exhibits more than 4V at 2.4GHz for input power above 15 dBm.
Mots clés
schottky diode
rectifier
power conversion
Efficiency
frequency 2.4 GHz
frequency 2.45 GHz
harmonics filtering
high input power conversion
input matching circuit
low input power conversion
series mounted diode rectifier
series topology
single stage voltage doubler rectifier
voltage 3 V
voltage doubler structure
wireless power transmission
Band-pass filters
Harmonic analysis
Microwave filters
Schottky diodes
Voltage measurement
efficiency 54 percent
efficiency 27 percent
efficiency 40 percent
RF rectifiers
inductive power transmission
microwave power transmission
power harmonic filters
rectifiers