Antenna device

An antenna device, comprising:

• a plurality of substrate layers stacked over with one another, including an upper substrate layer and a lower substrate layer located on two sides respectively, wherein each of the upper substrate layer and the lower substrate layer defines an outer surface facing outwardly and an inner surface facing inwardly;
• a plurality of metallic layers disposed on the substrate layers respectively, and including a first metallic layer arranged on the upper substrate layer and a first magnetic structure arranged between the upper substrate layer and the lower substrate layer;
• a non-shielding channel at least defined at the upper substrate layer and communicating with the inner surface and the outer surface of the upper substrate layer;
• wherein the first metallic layer refrains from interfering with the non-shielding channel;
• an electronic component disposed on the outer surface of the upper substrate layer and corresponds to and at least partially covers the non-shielding channel;
• and
• an antenna unit disposed on the outer surface of the lower substrate layer and electrically coupling to the electronic component;
• wherein the electronic component transmits at least one antenna working signal to the antenna unit;
• wherein the first magnetic structure defines a transmittance of less than or equal to 50% for at least one antenna working signal.