An antenna structure includes a h-shaped radiator and a first radiator. The h-shaped radiator has a first segment, a second segment opposite to the first segment, a first end and a second end which are located at the first segment, a third end located at the second segment, a short-circuit point at the first segment, and a feeding point at the second segment, in which the first segment is longer than the second segment. The first radiator is connected to the second segment.