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Hovering unmanned aerial vehicles, or drones, can function as distant platforms for mounted sensors, as signal transceivers or for other purposes. However, they must be tethered, the tether functioning as a power cable which connects a tethered drone with a ground power unit. In this article we developed a concept in which a power cable is of modular structure, consisting of mutually identical modules. Each module has motorised propellers and is capable of preserving itself in a given, hovering position. We formulate an equation for current that, for a given set of parameters, make possible hovering of a drone with such a modular cable. The developed concept does not show significant improvement in maximal height of a drone thereby obtained. Causes of that are extracted from a set of assumptions defining the concept.

Concept of Modular, Self-Supporting Cable for Powering the Hovering Unmanned Aerial Vehicle