Integrated optical antennas are fundamental elements for many applications, such as optical interconnects, on-chip LIDAR systems, remote sensing and free-space optical communications (FSOC). This Thesis deals with the development of SWG metamaterial-assisted surface-emitting antennas to achieve millimeter-scale radiative apertures in silicon photonics. These antennas have been specifically designed to be able to form phase-controlled one-dimensional optical phased arrays (1D-OPA). In this work, we propose a radically new concept for the formation of 1D-OPA experimentally demonstrated for the first time. This solution is characterized by using a novel feeding scheme to illuminate hundreds of antennas, based on a distributed Bragg deflector (DBD) to efficiently irradiate collimated beams and steer them from silicon photonic chips using a single control element.