Perspective Chapter: Energy Harvesting in Wireless Communication – Radio Frequency and Visible Light Communication

This chapter explores the integration of energy-harvesting techniques in wireless communication systems, focusing on two prominent methods: radio frequency (RF) energy harvesting and visible light communication (VLC) energy harvesting. RF energy harvesting leverages ambient electromagnetic waves from sources such as cellular networks, Wi-Fi, and television broadcasts to convert RF signals into usable electrical energy, providing a sustainable power solution for low-energy devices in applications like wireless sensor networks and the Internet of Things (IoT). The chapter discusses the architecture of RF energy-harvesting systems, including antennas, rectifiers, and energy storage units, highlighting their efficiency and adaptability in various environments. In contrast, VLC energy harvesting utilizes light emitted from LEDs and other light sources to generate power through photovoltaic cells. This method not only facilitates energy collection but also enables simultaneous data transmission, thereby enhancing the overall functionality of communication systems. The chapter examines the advantages and challenges associated with VLC, such as light intensity variations and low conversion efficiency. By comparing these two energies harvesting techniques, we aim to provide insights into their complementary roles in developing self-sustaining wireless communication networks that can operate efficiently in diverse conditions while minimizing reliance on traditional power sources.