A Tilted-Orthogonal Receiver Coil Antenna to Improve Misalignment Tolerance in WPT Systems

This article proposes a novel receiver (Rx) coil antenna to mitigate the lateral misalignment problem in resonant wireless power transfer (R-WPT) systems. The proposed design comprising two Rx coils is analytically optimized by parametric sweeping the tilt angle $(\theta)$ . Consequently, the resultant structure is designated as a tilted-orthogonal Rx coil antenna with stable mutual inductance in the Rx active region. Therefore, regardless of the Rx misalignment, power transfer efficiency (PTE), realized using the circuit parameters, maintains its consistency. The analytical results of the proposed Rx coil antenna are experimentally verified. The misalignment tolerance of the proposed tilted-orthogonal Rx coil antenna is improved by 120.18% in terms of PTE compared with the conventional planar Rx coil antenna.