RF Power Transfer, Energy Harvesting, and Power Management Strategies
Abstract
Energy harvesting is the way to capture green energy. This can be thought of as a recycling process where energy is converted from one form (here, non-electrical) to another (here, electrical). This is done on the large energy scale as well as low energy scale. The former can enable sustainable operation of facilities, while the latter can have a significant impact on the problems of energy constrained portable applications. Different energy sources can be complementary to one another and combining multiple-source is of great importance. In particular, RF energy harvesting is a natural choice for the portable applications. There are many advantages, such as cordless operation and light-weight. Moreover, the needed infra-structure can possibly be incorporated with wearable and portable devices. RF energy harvesting is an enabling key player for Internet of Things technology. The RF energy harvesting systems consist of external antennas, LC matching networks, RF rectifiers for ac to dc conversion, and sometimes power management. Moreover, combining different energy harvesting sources is essential for robustness and sustainability.
Wireless power transfer has recently been applied for battery charging of portable devices. This charging process impacts the daily experience of every human who uses electronic applications. Instead of having many types of cumbersome cords and many different standards while the users are responsible to connect periodically to ac outlets, the new approach is to have the transmitters ready in the near region and can transfer power wirelessly to the devices whenever needed. Wireless power transfer consists of a dc to ac conversion transmitter, coupled inductors between transmitter and receiver, and an ac to dc conversion receiver. Alternative far field operation is still tested for health issues. So, the focus in this study is on near field.
The goals of this study are to investigate the possibilities of RF energy harvesting from various sources in the far field, dc energy combining, wireless power transfer in the near field, the underlying power management strategies, and the integration on silicon. This integration is the ultimate goal for cheap solutions to enable the technology for broader use. All systems were designed, implemented and tested to demonstrate proof-of concept prototypes.
Subject
TunableIntegrated CMOS
matching network
performance limits
RF energy harvesting
sensitivity
steady-state analysis
low-input energy-harvesting front end
power-level energy-harvesting front end
CMOS RF energy-harvesting front end
LC matching networks
RF rectifiers
RF energy-harvesting sensitivity
off-chip matching network
on-chip matching network
ultralow power
Charge pump
clamper
CMOS
compensation rectifier
controller
dual-path energy
extra energy
fully integrated
Internet of Things
LC matching
nonoverlapping cross-coupled level shifters
portable
power management
reconfigurable
RF energy harvesting
RF rectifier
self-sustainable
stages
storage capacitor
cross-coupled RF Rectifier
Diode-connected RF Rectifier
nonlinear analysis
energy recycling
transceivers
blocker harvesting
Integrated CMOS
multiple-input
energy harvesting
self-startup
switched capacitor
power conversion efficiency
solar
dc combiner
clampers
doublers
microwave amplifier
switched capacitor modeling
ac to dc
differential thyristor-based oscillators
tuning wireless power transmitters
multiple coils
near-field, watt-level
inductive link
Citation
Abouzied, Mohamed Ali Mohamed (2017). RF Power Transfer, Energy Harvesting, and Power Management Strategies. Doctoral dissertation, Texas A & M University. Available electronically from https : / /hdl .handle .net /1969 .1 /161309.
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