Compact Dual-Polarized Multibeam Switch Integrated Antenna System for 5G mm-Wave Applications

In this paper, a novel microstrip, single-layer, L-shaped series fed antenna array, with 12 elements operating at 28 GHz, is proposed. The antenna can switch its beam in 8 different directions covering 4 different azimuthal Phi cuts; which is accomplished using a passive beamforming network. Switching is achieved by using two 3 dB/90 degrees couplers. Each coupler is controlled by Ultra-CMOS single-pole double-throw (SPDT) switch IC that. The antenna has an average measured realized gain of 6 dBi at 28 GHz, with an absolute steering angle between 4 degrees to 24 degrees. The low cost and simplified design of the antenna, allows for its compact size of 48 x 49.5 mm(2) while also being suitable for 5G user equipment and high data rates applications.