Innovative Circuit Design Techniques for Efficient Radio Frequency Energy Harvesting

One technique to supply power to small, low power devices such as smart grid meters used in the Internet of Things or sensors in Wireless Sensor Networks is operating based on radio frequency energy harvesting. In this paper, we give the design of RF energy harvesting circuits, and consider some of the main components to take into account–circuits performance, rectifiers, impedance matching, converters, and power management. First of all we will discuss what RF energy harvesting is and why it’s important in modern electronics. Recent research and new concepts are used in this paper. It explains how to save power and capture energy by rectifier capcitor circuits and impedance matching. It shows how to store and use energy in the sections on converter design and power management. The paper also provides new research in efficient, low power circuits. In particular, these include adaptive impedance matching and ultra low power rectifiers. Lastly, it points out potential future challenges and opportunities, stressing the importance of innovation that would enable improvement in energy harvesting efficiency and practicability of RF energy harvesting. This will allow researchers and engineers to clearly understand the status of this technology and potential future development.