Impact of the Rotor Blade Rotation of a UAV on an Installed Field Probing Antenna

In recent years, in-situ antenna measurements employing unmanned aerial vehicles (UAVs) gained increasing interest. Related to this development, questions arise on the performance and accuracy of UAV-based measurements where the correction of the probing antenna influence, possibly dependent on moving parts of the UAV, is a critical point in particular in near-field measurements. This contribution deals with the field modulation caused by the rotating rotor blades, which has to be taken into account for precise measurements. A characterization of the arising modulation through measurement results is presented.