Advanced Multibeam Antenna Configurations Based on Reflectarrays: Providing multispot coverage with a smaller number of apertures for satellite communications in the K and Ka bands - Martinez-de-Rioja, E; Martinez-de-Rioja, D; Encinar, JA; Pino, A; Gonzalez-Valdes, B; Rodriguez-Vaqueiro, Y; Arias, M; Toso, G (Ieee Antennas And Propagation Magazine, 2019)