Transmitting assembly for a universal wireless charging device and a method thereof

A wireless charging device, comprising:

• a power source configured to generate a direct current (DC) voltage signal;
• a driver unit coupled to the power source and configured to convert the DC voltage signal to one of a first AC voltage signal having a first frequency and a second AC voltage signal having a second frequency, wherein the second frequency is different from the first frequency;
• and
• an assembly coupled to the driver unit, wherein the assembly includes:
• a first coil formed by one or more electrical conducting tracks that are printed or embedded in at least one layer of a printed circuit board (PCB), the first coil configured to transmit the first AC voltage signal having the first frequency according to a first wireless charging standard;
• and
• a second coil formed by a wire coil that is disposed on a surface of the PCB or within an aperture of the PCB, the second coil configured to transmit the second AC voltage signal having the second frequency according to a second wireless charging standard.