Circularly Polarized Shared Aperture Reflectarray and Patch Antenna Array for S- and Ka-Band

This paper presents a circularly polarized dual-band shared aperture antenna for satellite applications. The antenna achieves dual S- and Ka-band operation by housing both a circularly polarized high-frequency reflectarray and a circularly polarized low-frequency patch antenna array in the same aperture area. The high-frequency reflectarray part of the antenna has unit elements within the aperture...