Antenna Types for Small Cells Base Stations

SBS are the expected approach in achieving 5G targets. Indeed, reducing cell sizes through the use of heterogeneous networks (HetNets), employing greater spectral efficiency at each BS and, an increase an in spectrum are seen as solutions to meet the requirements of future wireless networks. These fall under the category of ``network densification', provided by spatial densification and spectral aggregation. Spatial densification is achieved by increasing the number of antennas at the SBS and increasing the density of SBSs per m2. Antennas requirements will be crucial in spatial densification in achieving 5G requirements.