Dual-band antenna

The invention discloses a dual-band antenna arranged on a baseplate, wherein, the baseplate is provided with an antenna installation surface; the dual-band antenna comprises a first radiating unit, a second radiating unit and a feed-in end; the first radiating unit is arranged opposite to the antenna installation surface of the baseplate and at least comprises a first side, a second side and a third side; the first side is arranged opposite to the third side, and the length of the first side is unequal to that of the third side; the second side is connected with the first side and the third side respectively; the second radiating unit is connected with the first side of the first radiating unit; and the feed-in end is connected with the third side of the first radiating unit and the antenna installation surface of the baseplate respectively.