The call for increased data rate and information transfer in the mobile broadband and cellular industry can no longer be over-emphasized. In addition to this challenge, mobile service providers and governmental agencies in recent years have had to overcome a perceived global bandwidth shortage due to the rapid increase in mobile data demand and the ever-increasing usage of smart mobile devices. 4K video streaming as well as the emergence of smart city camera systems, unmanned vehicular systems, etc are also burgeoning technologies demanding high data systems to run. Researchers in both academia and in the industry have called for the needed R&D (Research and Development) measures to be put in place for a new communication standard. That which ensures both interoperability and a suitable economy of scale to ensuring affordable cost for system deployments and end user satisfaction. Although tentative, the IMT-2020 5G vision will among other objectives seek to achieve between 100Mbits/s ~ 1Gbits/s user experienced data rate at a latency of 1msec. In the light of this demand, there is also a growing need to develop millimeter wave (mm-Wave) platforms to deliver information at this level. Originally intended for use in line-of-sight (LOS) backhaul communication for Local Multipoint Distribution Services (LMDS) in the late 1900’s, the sub-millimeter wave and mm-Wave bands in the 28GHz and 38GHz respectively have been proven by many researchers to be good candidates for 5th Generation (5G) and beyond mobile and broadband cellular communication systems. This unused frequency bands leaves much room for wideband connectivity and high data rate potentials. The antenna design and specifications are of particular interest to many researchers and also at the heart of mm-Wave communication. This is because, signal power and the antenna’s electrical / geometrical specifications are key parameters in developing the required base station antennas for both Massive MIMO and small cell access points, which are two promising approach to the tentative IMT-2020 standard. In a modern communication antenna system, it is essential to have both the azimuth and elevation planes with streamlined radiation patterns to allow for very directional communication to ensure reduced energy per transmitted bit. In this research therefore, the author has proposed a commercially viable microstrip Base-Station antenna. The design is capable of meeting mm-Wave cellular and broadband communication specifications and to further buttress the arguments made for a migration to the mm-Wave frequencies as suitable band spectrum for beyond 4G and 5G mobile cellular communication services. The proposed antenna has been simulated with CST Microwave Studio software and has been fabricated with Taconic TLY-5 lossy substrate material. The tested results can be incorporated with massive MIMO base-stations with fixed antennas arranged in a hexagonally sectorized fashion. The 42-element antenna has been designed and fabricated to provide directional propagation at all angles with minimal tilting and also minimize the design complexity by reducing the number of RF components required for phase shifting. Each array antenna has a 15.0 (± 2) degrees 3dB beam-width with side-lobe levels of less of -19dB in both azimuth and elevation planes. The 2D planner loaded dielectric parasitic patch microstrip antenna has been measured to provide a 1.5GHz wide band and a gain of more than 18dBi with VSWR of less than 1.4 to operate within 27.5GHz to 28.5GHz bandwidth in the azimuth and elevation directions.