A vertical polarized omni-directional monopole antenna including a single folded sheet of metal including a ground plane portion, from which extend generally perpendicularly thereto at least four posts, which terminate in respective diagonally extending portions extending generally perpendicularly to the posts, the diagonally extending portions being joined at first and second junction portions, and a connection portion extending from the second junction portion and a coaxial cable having a first conductor coupled to the connection portion and a second conductor coupled to the ground plane portion.