  In future drone applications fast moving unmanned aerial vehicles (UAVs) will
need to be connected via a high throughput ultra reliable wireless link. MmWave
communication is assumed to be a promising technology for UAV communication, as
the narrow beams cause little interference to and from the ground. A challenge
for such networks is the beamforming requirement, and the fact that frequent
handovers are required as the cells are small. In the UAV communication
research community, mobility and especially handovers are often neglected,
however when considering beamforming, antenna array sizes start to matter and
the effect of azimuth and elevation should be studied, especially their impact
on handover rate and outage capacity. This paper aims to fill some of this
knowledge gap and to shed some light on the existing problems. This work will
analyse the performance of 3D beamforming and handovers for UAV networks
through a case study of a realistic 5G deployment using mmWave. We will look at
the performance of a UAV flying over a city utilizing a beamformed mmWave link.
