Low-Profile Dual-Polarized Pattern-Reconfigurable Antenna With Independent Beam Control Capability in Both Polarizations for Indoor Application

A low-profile, dual-polarized pattern-reconfigurable antenna with the unique ability to independently control beam direction in both polarizations is presented. The design for each polarization incorporates two shorted patch antennas, capable of achieving varied main beam directions through feeding phase reconfiguration. A coupled shorting structure, parasitic strips, and a cross-shaped slot etched on the ground are employed to realize high port isolation. Two reconfigurable feeding networks are integrated for independent beam control in both polarizations. The fabricated prototype shows an overlapped -10 dB impedance bandwidth spanning 180 MHz (3.68-3.86 GHz), and the isolation between the two polarizations exceeds 25 dB. The measured tilted beams show considerable gain improvements both in main lobe and sidelobe directions compared to the broadside beam. Given the capability of independent beam control, the proposed antenna stands out as a promising candidate for 5G indoor communications.