Vertically-Polarized/End-Fire Phased Array with Folded-Slot Resonators for Cellular Communications

This study aims to introduce a new phased array design with end-fire and vertically-polarized radiation for future cellular networks. The procedure of the array design is simple, accomplished on a single layer substrate material. Its schematic involves eight slot-loop elements with a 1×8 linear arrangement at the edge of the mainboard having FR4 material with 1.6 mm thickness. For maximum area utilization purposes, the proposed antenna elements occupy a small area with respect to the whole board area. The antenna elements are chosen based on the complementary structure of folded dipoles with different polarization covering the range of 24-30 GHz supporting 26, 28, and 30 GHz sub-mm-wave 5G bands. The proposed array appears with a simple design, low complexity profile, and its attractive broad impedance bandwidth, end-fire radiation mode, vertical polarization, and stable characteristics meet the needs of 5G applications in future cellular communications.