Systems and methods of use for a radial combiner. The radial combiner is made of a radial cavity defined by a top plate, a bottom plate, an outside wall connecting the top plate and the bottom plate, and an interior of the radial waveguide cavity located between the top plate, the bottom plate, and the outside wall with a substantially uniform height throughout. Inside the radial cavity are multiple monopole radiators, while outside the radial cavity multiple coaxial ports are mounted on one of the top plate or the bottom plate. Each of the coaxial ports are electrically connected to a corresponding monopole radiator inside the cavity. The radial combiner also contains a center conductor which is located in the center of the radial cavity, and transitions to a coaxial waveguide which is exterior to the cavity.