Mid-Air Wireless Power Transfer for Drones Using Resonant Inductive Coupling

The limited battery life of drones remains a critical bottleneck in their widespread application, especially for long-duration or continuous operations.Traditional charging methods require drones to land, interrupting missions and reducing efficiency.This paper proposes and evaluates a wireless charging system for drones in-flight using resonant inductive coupling.A high-frequency transmitter embedded in a tethered aerial platform wirelessly transmits power to a receiver coil on the drone.Simulations and experimental tests demonstrate a continuous charging capability at altitudes up to 20 meters with a maximum efficiency of 78%.This technology can enhance drone autonomy and revolutionize aerial applications in surveillance, delivery, and disaster management.