2026-06-06T00:48:59Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/380742026-02-03T11:13:22Zcom_10630_2254col_10630_37953

Metal-Only 3D Unit Cell for Reflectarrays with Independent Dual-Band Operation. Biedma-Pérez, Andrés Pérez-Escribano, Mario Parellada-Serrano, Ignacio Palomares-Caballero, Ángel Padilla, Pablo García-Vigueras, María Molero, Carlos Radiofrecuencia Antenas de reflector https://openpolicyfinder.jisc.ac.uk/id/publication/3355 This paper presents a metal-only reflectarray based on a 3D unit cell with dual-band capability. The 3D unit cell is a square waveguide whose vertical walls include resonator elements with independent frequency performance. Different resonator geometries are analyzed to obtain a reflected phase variation in the target frequency band and to be feasible for 3-D manufacturing. C-shaped, triangle-shaped, and circle-shaped resonators are selected to obtain the required phase shift in reflection. A reflectarray (RA) prototype is designed, including pairs of resonators where the C-shaped resonator controls the low-frequency band, and the triangle resonators do so for the high-frequency band. The main reflected beam directions for each frequency band are different to show the independent phase tuning of the resonators. The prototype is manufactured using stereolithography (SLA) with a subsequent silver coating. Measured results show realized gains of 21.2 dBi in the 18 GHz band and 23.63 dBi in the 26.75 GHz band, with a good agreement with the simulated results. 2025-03-04T09:46:14Z 2025-03-04T09:46:14Z 2025 journal article https://hdl.handle.net/10630/38074 10.1109/LAWP.2025.3548310 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional IEEE