A display device includes a display panel, a conductive layer disposed on the display panel and including a plurality of first patterns and a plurality of second patterns having a shape different from the first patterns, and an antenna element spaced from the conductive layer and operating in each of a first frequency band and a second frequency band. A first signal within the first frequency band constructively interferes with a first reflected signal corresponding to the first signal reflected at least partially by the first patterns, and a second signal within the second frequency band constructively interferes with a second reflected signal corresponding to the second signal reflected at least partially by the second patterns.