Abstract: A double-fed tunable terminal antenna based on a metal rear shell is provided. The antenna includes: a Printed Circuit Board (PCB); a metal rear shell, on which two gaps are set, and the two gaps divide the metal rear shell into three parts, one of three parts serves as an antenna radiation unit; a grounding element, connected with the metal rear shell; and two feed matching networks and corresponding two feed points, the two feed matching networks are fed into the antenna radiation unit through the corresponding two feed points.

Abstract: Provided are an antenna and a user equipment. The antenna includes a mainboard PCB 1, a metal frame 2, an antenna radiation element 3, a first and second feeding branch element 31, 32, a grounding element 4, a feeding point 7, and a clearance area 8. The mainboard PCB 1 is connected to the metal frame 2 via grounding element 4; the antenna radiation element 3 is arranged in clearance area 8 located at an upper side of the mainboard PCB 1; the metal frame 2 and the antenna radiation element 3 are arranged on a perimeter of a user equipment to form a user equipment frame, and a first and second gap 21, 22 are provided between metal frame 2 and antenna radiation element 3; and the feeding point 7 is connected to the antenna radiation element 3 via the first and second feeding branch element 31, 32, separately.