A Polarization Reconfiguration Wideband Fabry-Perot Resonator Antenna with Resistor Manipulation

A broadband and high gain polarization reconfigurable Fabry-Perot resonator antenna is presented. The antenna is principally made up of a microstrip source antenna, a single-layer 2×2 circular patch metasurface, a ground plane, a double-layer partially reflective surface (PRS), and four resistors. Characteristic Mode Analysis (CMA) reveals that the circular patch metasurface effectively excites circular polarization (CP) characteristics. The double-layer PRS exhibits a positive reflection phase gradient, transmitting the radiation of CP waves. Furthermore, additional CMA analysis shows that the inclusion of resistors modifies the direction of mutually orthogonal currents, thereby enabling the antenna’s polarization reconfiguration capabilities.