Designs of Dual-band Metamaterials for Near-field Wireless Power Transmission

Within the ever-changing environment of Wireless Power Transmission (WPT), the goal of increased efficiency and charging range has gained significant interest. A significant difficulty is the inherent reduction in energy transmission with increasing distance and decreasing coupling coefficients. Metamaterials (MTMs), designed objects with remarkable electromagnetic characteristics, represent a possible option for overcoming these restrictions through magnetic field manipulation. Recent research has focused on multiband WPT systems, namely dual-band metamaterial (DB-MTM) that can optimize power transfer efficiency at two different frequencies at the same time. This study presents a complete overview of recent advances in DB-MTM for WPT applications. It investigates the structural complexities of these metamaterials before conducting a comparative examination of previously described DB-MTM-based WPT systems across a range of performance criteria.