Dyson Conical Quad-Spiral Array as Ultrawideband Feed System - Garcia, Enrique; Llorente Romano, Sergio; Garcia Lamperez, Alejandro; Herraiz Martinez, Francisco Javier; Salazar Palma, Magdalena; Segovia Vargas, Daniel; Serna Puente, Jose Manuel; Tercero, Felix; Lopez Perez, Jose Antonio; Colomer, Francisco; Lopez Fernandez, Jose Antonio (2015 Loughborough Antennas & Propagation Conference (Lapc), 2015)