Type of antenna microwave antenna. For Heathkit Cantenna antenna-related device, see This article is about aantenna. For Heathkit Cantenna antenna-related device, see Dummy load . For the battle, see Battle of Cantenna A cantenna (a portmanteau blending the words can and antenna) is a homemade directional waveguide antenna, made out of an open-ended metal can. Cantennas are typically used to increase the range (or discovery) of Wi-Fi networks. Construction [ edit ] The cylinder portion of the can may consist of metal-coated paperboard. Although some designs are based on a Pringles potato chips can, this tube is…