4×4 Antenna Array for 5G Millimeter Wave Applications

In this paper, a 4×4 antenna array for 5G millimeter wave applications is presented. The antenna unit consists of an E-shaped patch and a slot etched on the ground fed by an F-shaped branch. The antenna unit possesses a −10dB reflection coefficient bandwidth of 48.7%. we extend the antenna unit into 4×4 1-D scanning phased array and add the structure of decoupling. The antenna array operates at 27 GHz band (24.5-29.5 GHz), with high port isolation of better than 20 dB. A scanning angle from −59 degrees to +59 degrees with a high peak gain of 17.3 dBi is realized by the proposed beam scanning array. The size of the 4×4 array antenna is 35×20×2 mm
³
.