3D Bifocal Design Method for Dual Reflectarray Configurations with Application to Multi-Beam Satellite Antennas in Ka-Band. (Premio Jóvenes Investigadores URSI 2018) - Carolina Tienda; Encinar Garcinuño, José Antonio; FLORENCIO DÍAZ, RAFAEL; MARTINEZ DE RIOJA DEL NIDO, EDUARDO MARIA (3d Bifocal Design Method For Dual Reflectarray Configurations With Application To Multi-Beam Satellite Antennas In Ka-Band, 2018)