Rfenergyharvestingadi

In this paper, we present a comprehensive literature review on the research progresses in wireless networks with RF energy harvesting capability, which is referred to as RF energy harvesting networks (RF-EHNs). First, we present an overview of the RF-EHNs including system architecture, RF energy harvesting techniques, and existing applications.

What is RF energy harvesting?

RF energy harvesting offers a promising solution for energy constrained networks (such as the IoT) by converting RF signals into electrical energy which can be used to provision the energy needs of the smart devices in order to prolong their lifetime.

What are the technical challenges associated with RF energy harvesting?

The growing interest in RF energy harvesting, being a promising renewable energy solution, has also identified a number of technical challenges associated with the energy harvesting process (see Section 8.1), including antenna design for transmitters and receivers, rectifiers, and matching networks.

Can RF energy harvesting improve network longevity?

RF energy harvesting is one promising solution to achieve network longevity where a sufficient amount of energy could be harvested from both ambient and dedicated RF sources.

Does RFEH integrate with energy storage solutions?

The integration of RFEH with efficient energy storage solutions, such as, super-capacitors and advanced batteries holds great significance. This integration guarantees a consistent power supply to applications, even in the case of RF energy fluctuations or when the ambient RF sources energy levels are weak.

Can RF power harvesting provide alternative sources of energy?

Certain achievements made to date have made power harvesting a reality, capable of providing alternative sources of energy. This review provides a summ ary of radio frequency (RF) power harvesting technologies in order to serve as a guide for the design of RF energy harvesting units.

What research activities are required for RF energy harvesting?

The review covers the disparate research activities required for RF energy harvesting including dedicated vs. ambient harvesting sources, evaluation metrics, energy propagation models, rectenna architectures, and MAC protocols for RF power harvesting.