This article is about a microwave antenna. For Heathkit Cantenna antenna-related device, see Dummy load. For the battle, see Battle of Cantenna. 5.5 GHz cantenna as a feed horn 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 netw