A wideband antenna, for use in portable computers incorporating at least one wireless communication device, with improved radiated antenna efficiency across a broad range of operating frequency bands with minimal additional physical size or cost, is described. In an exemplary embodiment, the wideband antenna is defined by at least a first and second housing, where a first metal structure in at least a first one of the at least a first and second housings is commonly connected to at least two antenna RF feed ports at a boundary of the at least a first and second housing. In a further exemplary embodiment, the device is a portable computer, and the first housing is an upper display housing, the second housing includes a wireless communication device with at least two RF signal paths to at least two antenna RF feed ports, and the second housing further includes a second metal structure commonly connected to at least two antenna RF feed ports of the wideband antenna.