The Scientific World Journal / 2014 / Article / Tab 2

Research Article

An RF Energy Harvester System Using UHF Micropower CMOS Rectifier Based on a Diode Connected CMOS Transistor

Table 2

A comparison of this work with [4].

Maximum efficiency approach (this work)Maximum efficiency approach [4]

Number of stages510
Transistor 30  m/0.18  m30.2  m/0.5  m
Output voltage1.15 V at −8 dBm 50  input power1.05 V at −8 dBm 50  input power
Capacitor per stage32 pF/stage (160 pF total)5.6 pF/stage (56 pF total)
Efficiency at 220 mV Vin and 200 K output load40.17%33.69%
Additional requirementDeep n-wellZero-Vth native transistor