In this paper, a novel lens antenna comprising of a compound Fresnel zone plate (FZP) lens is proposed and realized. The unique realization of the lens is clearly explained in this paper. The compound lens consists of two half-open FZP lenses, plane and conical, conformal to a thin low-loss perspex dome with a shape of a truncated cone. The lens antenna has been designed for the frequency of 57.5 GHz. The compound FZP lenses are 3D in configuration and have more levels of design and optimization freedom