Abstract
In this paper beam steering antenna system is presented at the operating frequency of 28 GHz. The beam steering is based on active partially reflective surface (PRS). The PRS is a combination of metallic grid and apertures in which PIN diodes are embedded. The PIN diodes make it beam steerable PRS when its switching states changes from ON to OFF. It is divided into four parts with respect to columns to achieve the beam steering in the elevation plane. A rectangular patch antenna is placed at the distance of 0.48 λ below to feed the PRS. Different states of PRS have different combination of its reflection phase and magnitude that demonstrate to achieve the beam steering angle of ±60° it the elevation plane.
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