Disclosed is a broadband patch antenna (10) comprising a planar metallic patch sheet (12) that is provided with right-angled edges and is disposed at a predetermined first height (H) above and parallel to the planar base area (11a) of an electrically conducting reflector (11), and a device (13, .., 16) for feeding an HF signal into the metallic patch sheet (12). Said feeding device (13, .., 16) encompasses a conductor (14) which is guided in a vertical direction and in an insulated manner through the base area (11a) of the reflector (11) while ending at a feeding point (16) on the metallic patch sheet (12). In order to substantially improve the broadband range while keeping the structure of the antenna simple, the metallic patch sheet (12) has the shape of a cross while the conductor of the feeding device (13,..,16) is configured between the base area (11a) of the reflector (11) and the metallic patch sheet (12) as an inner conductor (14) of a coaxial conductor arrangement.