This review paper looks at Antenna gain for beamforming for 5G mmWave networks. Beamforming is a very key aspect of 5G networks and coupled with MIMO, it will be able to accommodate the much needed functionalities of 5G mmWave Technology. Several related works by other researchers are reviewed. In the research a Quadrature baseband (QBB) beamforming approach is presented as a possible solution to this challenge. ODFM signals are used in the MatLab simulations to be able to compare results at RF versus QBB. On-going research in this area entails that it is possible to have an optimal solutions to the aspect of antenna gain and solve some of the challenges being faced as the 5G network system roll out continues. Antenna design challenges are expected with which impacts on propagation losses and calls for best beamforming configurations

Keywords : Beamforming; Quadrature baseband; Antenna gain, 5G Networks, mm Wave;