Abstract
This work proposes a dual-domain maximum power tracking (MPPT) technique for multiple-input RF energy harvesting systems. A differential rectifier array is used to implement 4-channel reconfigurable RF to DC power conversion, and an adjustable 4-bit capacitor array is designed to improve the impedance matching between the antennas and the rectifiers. Using the perturbation and observation (P&O) method, both arrays are adaptively configured in the background with the variations of the input energy and output loading. Experimental results show that the proposed circuit successfully tracks the maximum power points while harvesting RF energy, with the peak conversion efficiency of 49.06% when the input energy is −6 dBm. With the proposed dual-domain MPPT, the high efficiency range of the energy harvesting system is greatly extended to 21 dB (−21–0 dBm).
Highlights
With the continuously advancing wireless communication technologies, internet of things (IoTs) is becoming popular in many new applications nowadays
Energy harvesting is mainly used in IoTs to reduce network maintenance costs and replace the use of batteries [8–13]
maximum power point tracking (MPPT) condition and input energy, the configuration that obtains same loading the highest output means that maximumand power points have been and
Summary
With the continuously advancing wireless communication technologies, internet of things (IoTs) is becoming popular in many new applications nowadays. The unstable bias voltage will reduce the conversion efficiency and increase theoutput cost Other solutions such as Schottky diodes harvesting systems. To make harvesting system work of RF-DC rectifiers by connecting the rectifiers inthe various topologies to match d with low input energy, multi-stage rectifiers could be used in series to increase the output output loading conditions, thereby improving the range of high conversion eff voltage. Thatiswill not onlyWith decrease conversion efficiency, and lowerpower the ing configurations, the efficiency range of array the overall harvesting sy range(MPPT) Byhigh configuring both the rectifier and impedance matching array according to different input energy levels and output loading, a higher greatly extended. Arrays, the dual-domain maximum power tracking circuits, and a buck-boost converter
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
