The electromagnetic energy transfer device includes a first resonator structure receiving energy from an external power supply. The inside of the actuator member includes a helical groove within an inner cavity. The phase of the extracted clock signal may be adjusted to compensate for processing delay during equalization of the received data. The retaining element has a thickness approximately corresponding, or corresponding, to the maximum thickness of the adhesive layer at the edge of the protective sheet and is partially covered by the protective sheet at least in defined parts.