For the future millimeter wave wireless systems the high gain steerable antennas are the key technology to overcome large path loss and support users’ mobility and reconfigurable backhauling. This paper introduces a specially designed reflect-array antenna (RAA), integrating single phased antenna array (PAA) module (as a feed source) and flat reflecting surface. The RAA provides high antenna gain by focusing the beam in vertical plane, but, at the same time, supporting beamsteering capability in the horizontal plane. The RAA technology allows creation of the very larger aperture antennas with simplified light-weight design. Two RAA prototypes with different feed source mounting demonstrated reliable multi-gigabit IEEE 802.11ad link 2.3–4.62 Gbps at distances 100–150m. These properties of the RAAs make them suitable for both millimeter-wave mobile access and reconfigurable backhauling applications.