Dual band antenna and electronic device using the same

An electronic device, comprising:

• a housing, at least including a first side surface and a second side surface, the second side surface being perpendicular to the first side surface, the first side surface is adjacent to the second side surface;
• a circuit board, being disposed at the first surface and parallel to the first side surface;
• and
• a dual band antenna, including:
• a feed end;
• an annular connection end having an opening, wherein the annular connection end is connected to the feed end, the opening is configured to receive the metal screw, the metal screw has a threaded stud passing through the opening, so that the metal screw is electrically connected to the annular connection end;
• a first extension path connected to the feed end;
• a second extension path connected to the first extension path;
• a third extension path connected to the second extension path;
• and
• a grounding part connected to the third extension path;
• wherein the feed end, the annular connection end, and the metal screw are configured to form a monopole antenna, and the feed end, the first extension path, the second extension path, the third extension path, and the grounding part are configured to form a loop antenna, the loop antenna is disposed on the second side surface and the monopole antenna is disposed at the circuit board on the first side surface.