A modular electromagnetic antenna assembly configured for securement to a structure is provided. The assembly includes an antenna, a radio, and a base. The base has a bracket securable to the structure and the base has at least one feed. The radio and base together form a waveguide that transmits radio waves between the radio and the antenna. The radio is removably secured to the base so as to form a removable mechanical connection to the base and a removable communication connection with the at least one feed through the base.