Investigation of a multi-hop wireless power transfer based on repeater coils

Abstract

Traditional wireless power transmission systems have limitations in distance and efficiency. The proposed multi-hop wireless power transmission systems (Multi-Hop WPT systems) address these issues with the use of intermediate repeater coils as power hop nodes. A multi-hop wireless power transmission system (Multi-Hop WPT) works by using a series of repeater coils where power is hopping between nearby nodes. The initial source transmits power in the form of electromagnetic waves and the first node captures it. This first node gathers the power and retransmits toward the next hop or the final destination. The methodology involved several key steps. The methodology of this study followed a systematic approach in designing, constructing, and evaluating a multi-hop wireless power transmission (Multi-Hop WPT) system. Two resonator coils were designed as the transmitter and receiver, with their dimensions and material properties optimized for efficient wireless power transfer. The system was tuned to operate within the ISM frequency band, ensuring regulatory compliance. Intermediate hop nodes were strategically placed to enhance range and efficiency. The system's performance was tested using a vector network analyzer (VNA), and power transfer efficiency was verified against theoretical expectations, confirming both accuracy and effectiveness. The experimental results demonstrated that the multi-hop wireless power transmission (WPT) system effectively addressed the distance and efficiency limitations of traditional wireless power transmission systems. By employing intermediate repeater nodes, the system successfully transmitted power over extended distances with minimal loss. Moreover, the design exhibited significant potential for scalability and flexibility, paving the way for future advancements. The study proposed further improvements through the development of an advanced multi-hop node, incorporating a power receiver coil, RF to DC converter (Radio Frequency to Direct Current Converter), power amplifier, and re-transmitter coil, which could enhance system efficiency, range, and scalability, positioning multi-hop wireless power transmission systems as a promising alternative for various applications.