Comments on “Doubly Curved Reflector Design for Hybrid Array-Fed Reflector Antennas”

The above-titled paper on the design of doubly curved reflectors fed by line sources is discussed. The designed reflector transforms a line source wave to a plane wave in the reflector aperture, which produces a pencil beam. A similar design approach to these antennas was proposed in several papers earlier. This approach is based on the theory of focusers. Features of obtained solutions are described.