  This paper discusses the analysis of a fixed-wing unmanned aerial vehicle
(UAV)-based millimeter wave (mmWave) backhaul link, that is offered as a
cost-effective and easy deploy the solution to connect a disaster or remote
area to the nearest core network. We present the optimal design of a relay
system based on fixed-wing UAV, taking into account the actual channel
parameters such as the UAV vibrations, tracking error, real 3GPP antenna
pattern, UAV's height, flight path, and the effect of physical obstacles. The
performance of the considered system is evaluated in terms of outage
probability and the channel capacity while taking into account the impact of
the system parameters such as optimal selection of UAV flight path and antenna
patterns.
