Single and Dual Reflectarray Configurations for Multibeam Satellite Antennas in Ka-Band - Martinez-de-Rioja, D; Martinez-de-Rioja, E; Encinar, JA; Pino, A; Rodriguez-Vaqueiro, Y; Gonzalez-Valdes, B; Rubiños, O; Arias, M (Antennas And Propagation (Eucap), 2019 13th European Conference On, 2019)