A 5G dipole antenna device comprising: a flat plate-shaped supporting base made of electrically insulating material, a first terminal designed to provide an antenna signal, and a second terminal set at a pre-established reference potential, and at least one dipole antenna electrical circuit comprising: at least a first flat portion made of electrically conductive material which is arranged on said supporting base coplanar to the same and is electrically connected to said first terminal, said first portion having an approximately polygonal shape, at least one second flat portion made of electrically conductive material which is arranged on said supporting base coplanar to the same so as to be electrically insulated from the first portion and is electrically connected to said second terminal, said second portion comprising at least one first branch having an elongated shape which extends immediately alongside a first side of said first portion, and at least one plate-shaped element made of electrically conductive material that lies on a plane transverse to the placement plane of said supporting base and is electrically connected to said first branch of said second portion, said plate-shaped element being adjacent to said first side of said first portion and forms, with said first adjacent side of said first portion, a capacitive antenna element. a flat plate-shaped supporting base made of electrically insulating material, a first terminal designed to provide an antenna signal, and a second terminal set at a pre-established reference potential, and at least one dipole antenna electrical circuit comprising: at least a first flat portion made of electrically conductive material which is arranged on said supporting base coplanar to the same and is electrically connected to said first terminal, said first portion having an approximately polygonal shape, at least one second flat portion made of electrically conductive material which is arranged on said supporting base coplanar to the same so as to be electrically insulated from the first portion and is electrically connected to said second terminal, said second portion comprising at least one first branch having an elongated shape which extends immediately alongside a first side of said first portion, and at least one plate-shaped element made of electrically conductive material that lies on a plane transverse to the placement plane of said supporting base and is electrically connected to said first branch of said second portion, said plate-shaped element being adjacent to said first side of said first portion and forms, with said first adjacent side of said first portion, a capacitive antenna element. at least a first flat portion made of electrically conductive material which is arranged on said supporting base coplanar to the same and is electrically connected to said first terminal, said first portion having an approximately polygonal shape, at least one second flat portion made of electrically conductive material which is arranged on said supporting base coplanar to the same so as to be electrically insulated from the first portion and is electrically connected to said second terminal, said second portion comprising at least one first branch having an elongated shape which extends immediately alongside a first side of said first portion, and at least one plate-shaped element made of electrically conductive material that lies on a plane transverse to the placement plane of said supporting base and is electrically connected to said first branch of said second portion, said plate-shaped element being adjacent to said first side of said first portion and forms, with said first adjacent side of said first portion, a capacitive antenna element.