Antenna structure

An antenna structure applied in a wireless communication device, the antenna structure comprising:

• a metal frame comprising a first surface, a second surface, and a third surface;
• wherein:
• the third surface is located between the first surface and the second surface;
• the metal frame comprises at least one antenna;
• the at least one antenna comprises a first gap, a second gap, and a feed portion;
• the first gap is disposed between the first surface and the second surface;
• the second gap is disposed in the third surface;
• and
• the feed portion is mounted on the first surface and spans the first gap, wherein
• when the feed portion supplies an electric current, the electric current is coupled to the first gap and the second gap.