A Novel High Gain Tri-Band Three-Dimensional Phased Array for 24/26/28 GHz Smartphone Applications

In this manuscript, a three-dimensional phased-array antenna has been proposed for 5G smartphone applications at millimeter-wave spectrum. It consists of 4-subarray distributed on the four sides of the mobile phone’s mainboard. The suggested 3D phased-array shows a high capability to provide a full space coverage (360°) in the phi-plane, besides a 180°-half-space coverage in both elevation and azimuth plane. Each subarray is composed of 10 antenna-element where the antenna individual version is composed of a small fork-shaped antenna built on the RTRogers 5880 Duroid laminate, with 0.0009 low tangent loss, 2.2 permittivity, and full size of 5 x 6 x 0.8 mm
³
. The proposed phased array design exhibits a triple-band operation at the three prominent bands namely, 24 / 26 / 28 GHz with a total bandwidths of 197 / 506 / 600 MHz respectively. Furthermore, a high gain surpassing 16dB has been attained in the broadside direction with stable and uniform radiation pattern which is highly required for the transmission in the MMW range. The array performance has been carefully evaluated which assured its suit ability for the 5G portable devices.