Antenna structure and communication device

The invention relates to an antenna structure and a communication device. The antenna structure comprises a radiation unit, a coupler and a feed unit which are stacked. The coupler comprises a first dielectric plate and a second dielectric plate; a plurality of first via holes are formed in the first dielectric plate; a plurality of second via holes are formed in the second dielectric plate; a conduction band is arranged on the surface, close to the first dielectric plate, of the second dielectric plate. The conduction band comprises a main body part, and a plurality of first branch parts and a plurality of second branch parts which are connected with the main body part. A first transmission structure is arranged in the first via hole, one end of the first transmission structure is electrically connected with one of the plurality of first branch parts, and the other end of the first transmission structure is electrically connected with the feed unit; and a second transmission structure is arranged in the second via hole, one end of the second transmission structure is electrically connected with one of the plurality of second branch parts, and the other end of the second transmission structure is electrically connected with the radiation unit. According to the invention, the conversion loss of the coupler and the radiation unit is reduced, and the structure is simple and compact.