An antenna module includes an antenna and a periodic structure. The periodic structure is disposed on one side of the antenna, and includes a plurality of first pillars, a plurality of first bridge members, and a plurality of second pillars. The plurality of first pillars of a periodic structure are arranged at intervals along a one-dimensional array The plurality of first bridge members are arranged at intervals in an arrangement direction, and connect the side of the plurality of first pillars away from the antenna, wherein the plurality of first bridge members define a second virtual layer. The plurality of second pillars are arranged in parallel with the first pillars and are connected to a side of the plurality of bridge members away from the antenna. Each of the second pillars and the first pillars adjacent to the second pillars are offset from each other in the direction perpendicular to the second virtual layer. The periodic structure has an effect of reflecting electromagnetic waves, so that the radiation efficiency of the antenna module could be improved.
