Dual-band antenna

A dual-band antenna, for receiving or transmitting wireless signals of a first frequency band and a second frequency band in a wireless communication device, the dual-band antenna comprising:

• a rectangular metal plane, formed with a slot structure substantially extending from a first side to a second side of the rectangular metal plane;
• a feeding terminal, formed on the rectangular metal plane;
• and
• a grounding element, disposed on a third side or a fourth side of the rectangular metal plane, for electrically connecting the rectangular metal plane and a system ground of the wireless communication device;
• wherein the first side is substantially parallel to the second side, the third side is substantially parallel to the fourth side, and the first side is substantially perpendicular to the third side or the fourth side;
• the slot structure comprises:
• a first rectangular slot, substantially extending from the first side to the second side of the rectangular metal plane;
• a first L-shape slot, comprising a first segment, substantially extending from the third side to the fourth side of the rectangular metal plane, and a second segment, substantially extending from the first side to the second side of the rectangular metal plane and connecting to the first segment;
• and
• a second L-shape slot, comprising a first segment, substantially extending from the third side to the fourth side of the rectangular metal plane, and a second segment, substantially extending from the first side to the second side of the rectangular metal plane and connecting to the first segment.