Reference-Plane Invariant Free Space Dielectric Material Characterization up to 330 GHz - Moreno-Rodríguez S; Pérez-Escribano M; Ortiz-Ruiz S; Alex-Amor A; Plaza-Gallardo B; Ruiz FG; Molero C (2024 4th URSI Atlantic Radio Science Meeting, AT-RASC 2024, 2024)