Charger antenna unit, charger device, and device to be charged

A charger configured to charge a device to be wirelessly charged, the charger comprising:

• an antenna unit for charging a device to be inductively charged, the antenna unit including:
• an excitation coil made of an electrical conductor wound around a toroidal core to excite a magnetic field inside the toroidal core,
• the toroidal core having an air-gap between two end-faces of the toroidal core,
• wherein the two end-faces are facing each other, wherein the end-faces of the antenna unit are configured to be parallel to each other, and
• the winding density of the excitation coil along the toroidal length of the toroidal core is higher in the vicinity of the respective end-faces as compared to the remaining parts of the toroidal core, and
• a housing having an opening adapted to be aligned with the device to be inductively charged, such that a receiving antenna of the device to be inductively charged can at least partially be inserted into the air-gap of the toroidal core of the charger antenna unit, wherein a magnetic shield is provided in the housing at the toroidal core, wherein the magnetic shield is at least partly provided as a coating or plating on a carrier medium.