  A measurement setup made of millimeter-wave and ultra wideband transceivers
mounted on both a customized UAV and a ground station for full 3D wireless
propagation analysis is described in this work. The developed system represents
a flexible solution for the characterization of wireless channels and
especially of urban propagation, as the drone might be easily located almost
anywhere from ground level to the buildings rooftop and beyond. The double
directional properties of the channel can be achieved by rotating directive
antennas at the link ends. Other possible applications in urban contexts
include above ground level propagation, outdoor-to-indoor penetration,
line-of-sight to non-line-of-sight transition, scattering from buildings and
air-to-ground channel characterization for UAV-assisted wireless
communications.
