An antenna structure is provided for use in an electronic device. The antenna structure includes a first feeding part; a second feeding part; and an antenna radiator including a first connection pattern including a first end and a second end, the first end of the first connection pattern being electrically connected to the first feeding part; a second connection pattern including a first end and a second end, the first end of the second connection pattern being electrically connected to the second feeding part; a first pattern that connects the second end of the first connection pattern and the second end of the second connection pattern; and a second pattern that extends from at least one end of the first pattern. The first feeding part is configured to transmit or receive a signal of a first frequency band, and the second feeding part is configured to transmit or receive a signal of a second frequency band that at least partially overlaps the first frequency band.