Abstract.This article discusses the prospects for the use of unmanned aerial vehicles in the field of light cargo transportation. The author noted the problem according to which unmanned aerial vehicles are not protected from collisions with obstacles in the form of walls, trees, other drones in case of crossing routes. In this regard, the article describes the study of the electrodynamic characteristics of microstrip phased antenna arrays, emphasizing their advantage over the existing obstacle avoidance systems based on ultrasonic sensors. The structure of the MNG-substrate is considered, which makes it possible to reduce the size of the antennas for convenient and smaller-sized mounting in the body of an unmanned aerial vehicle without losing the effective values of the parameters.

Key words: unmanned aerial vehicle, drone, microstrip antenna, phased array antenna (PAA), security system, metamaterials.