US Patent 11038254 Mobile device

A mobile device includes a common ground element, a connection element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, and a dielectric substrate. The first radiation element has a first feeding point. The first radiation element is coupled through the connection element to the common ground element. The second radiation element is coupled to the first feeding point. The second radiation element is at least partially surrounded by the first radiation element. The third radiation element has a second feeding point. The fourth radiation element is adjacent to the third radiation element. The fourth radiation element is coupled to the common ground element. An antenna structure disposed on the dielectric substrate is formed by the common ground element, the connection element, the first radiation element, the second radiation element, the third radiation element, and the fourth radiation element.