Active Implantable Medical Devices (AIMDs) are continuously evolving; nowadays, though the devices are always much more complex and sophisticated, the power supply is a common challenge. It must guarantee safety, durability, and efficiency. A common technique is Wireless Power Transfer (WPT), and Class-E amplifiers are a possible solution in high-efficiency power amplifier (PA) applications. In the literature, higher frequencies begin to be more studied, principally to reduce coil dimensions and orientation sensitivity. The aim of this work is the development of a Wireless Power Transmitter through a Class-E amplifier at a carrier frequency of 13.56MHz (ISM radio band); the performance of the device developed has been evaluated to assess the capability of this solution in WPT.