High-Refractive-Index Metasurface Integrated Circularly Polarized Wireless Power Transfer System With Extended Range and Misalignment Tolerance

This letter presents the design and implementation of an orientation-independent wireless power transfer (WPT) system at 5.8 GHz ISM band, enhanced through integration of a high refractive index (HRI) metasurface (MTS). The transmitter employs a circularly polarized (CP) 2×2 array of diagonally fed rectangular microstrip patches to ensure rotational misalignment tolerance and improved gain. At the receiver side, a new hexagonal complementary star-shaped resonator (HCSSR)-based RI-MTS with a refr