Seamless metamaterial integration into slotted resonators for compact high-performance near-field wireless power transfer system design
Dautov K. Jarndal A. Almajali E. Majzoub S. Mahmoud S.A. Bonny T. Hashmi M.
October 2025Springer International Publishing
Journal of King Saud University - Engineering Sciences
2025#37Issue 6
This paper presents a novel design concept for near-field wireless power transfer (WPT) systems that leverages the seamless integration of metamaterials (MTMs) into slotted resonators. This approach enhances magnetic field (B) distribution, strengthens evanescent wave coupling, and hence improves overall WPT performance. An MTM structure exhibiting negative permeability at the operating frequency of 433 MHz was designed and incorporated into a square-slot-based resonator. Electromagnetic (EM) analysis revealed increased current density and subsequently enlarged B around the resonator. Additionally, impedance matching, key parameter extraction, and equivalent circuit (EC) modeling were performed using the effective J-inverter method. The developed WPT system, with compact dimensions of 30×302, achieved a power transfer efficiency of 82% at 33 mm. The design was experimentally validated, showing excellent agreement among EM simulations, EC modeling, and measurement results. Finally, performance comparison with other reported systems confirmed the superiority and practical effectiveness of the proposed design in enabling compact and highly efficient WPT systems.
Coupling , Magnetic field , Metamaterial (MTM) , Power transfer efficiency , Resonator , Slotted Ground Plane (SGP) , Unit Cell (UC) , Wireless Power Transfer (WPT)
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Research Institute of Sciences and Engineering (RISE), University of Sharjah, Sharjah, 27272, United Arab Emirates
Department of Electrical Engineering, University of Sharjah, Sharjah, 27272, United Arab Emirates
Department of Computer Engineering, University of Sharjah, Sharjah, 27272, United Arab Emirates
School of Engineering and Digital Sciences (SEDS), Nazarbayev University, Astana, 010000, Kazakhstan
Research Institute of Sciences and Engineering (RISE)
Department of Electrical Engineering
Department of Computer Engineering
School of Engineering and Digital Sciences (SEDS)
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