A metallized channel guide antenna for use over a cylindrical ground screen

A low profile metallized channel guide antenna mounted over a cylindrical ground plane is shown to have excellent characteristics for sector elevation coverage. Proper selection of the spacing between antenna and ground plane allows optimum gain at the horizon and relatively constant gain over a wide elevation sector. Metallizing the sides and bottom of the channel guide improves the elevation coverage by suppressing the image of the antenna below the cylindrical ground plane surface.