The invention provides a directional antenna comprising a first substrate, wherein the first substrate has a first surface and a second surface; at least one first dipole antenna unit, wherein the first dipole antenna unit is arranged on the first surface and first dipole antenna unit comprises two first dipole units; a metal surface, wherein the metal surface is covered on the second surface, and one end portion of the first dipole unit is in electrical connection with the metal surface; and a feed portion, wherein the feed portion is in electrical connection with the other end portion of the first dipole unit. The directional antenna has the advantages of being good in directivity and good in electromagnetic signal processing capability; meanwhile, gain is high, frequency band is wide and standing-wave ratio is small; magnetic signal reception and sending capability is enhanced; data interaction can be well finished in the wireless cover system; user experience is improved; and the requirements of a conventional wireless cover system for the wireless signal processing capability can be met.