A Novel Array of Strongly Coupled Magnetic Resonators for Misalignment-Resilient Wireless Power Transfer, Harvesting, and Sensing in Wearable Applications

This paper proposes a novel misalignment-resilient resonator for high-efficiency wireless power transfer, harvesting, and sensing in wearable applications. The selected topology is derived from the strongly coupled magnetic resonance principle, demonstrating robust power transmission and resilience to misalignment. Our system demonstrates resilience to angular misalignment for the first time using an array of SCMR resonators while maintaining reasonable efficiency over long distances. The proposed system operates at 40 MHz and has been designed and simulated on a gauze fabric substrate. The results show that for rotational misalignment ranging from 10 to 90 degrees, the system maintains an efficiency of 80 % across the entire range. Additionally, with a distance of 20 cm between the transmitter and receiver, the system exhibits 80 % efficiency. The efficiency was also tested for misalignment along all three axes, revealing that an 80 % efficiency level is achieved even when the misalignment on the x, y, and z axes simultaneously reaches 10 cm. This system can be integrated with a power harvesting circuit to collect DC power for body-worn sensors.