Abstract: An acousto-magnetic electronic article surveillance antenna is provided that attaches directly to a vertical structure with the electromagnetic field projected across an opening, such as an exit or entrance to a building or other defined area. The vertical structure could be a doorframe or wall, constructed from a wide variety of materials, including metal, wood, glass, concrete or gypsum wallboard. The antenna geometry is elongated vertically to allow a corresponding decrease in width projected from the vertical structure, thereby reducing the apparent size of the antenna and providing a near-concealed appearance and protection form physical damage.