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Printed Vertically-Polarized Quasi-Endfire Beam Steering Array with Full Ground Plane for 5G Mobile Applications

This paper proposes a quasi-endfire vertical polarized antenna array at 28.8 GHz for 5G mobile applications. The array element is composed of a dipole antenna with its two ends shorted by metallic via walls. The via walls have the same omni-directional radiation and 180° phase shift which generates a bi-directional radiation pattern. By adding another metallic via wall behind the array elements, it can act as a reflector, with the array radiating in only one direction. The antenna and array’s performance are verified in the simulations. The structure presents good impedance matching and vertically-polarized quasi-endfire radiation patterns. Moreover, the array has low profile and needs no clearance on the ground plane.