2026-06-01T04:39:08Zhttps://riuma.uma.es/rest/oai/request

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

00925njm 22002777a 4500 dc Biedma-Pérez, Andrés author Pérez-Escribano, Mario author Parellada-Serrano, Ignacio author Palomares-Caballero, Ángel author Padilla, Pablo author García-Vigueras, María author Molero, Carlos author 2025 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. https://hdl.handle.net/10630/38074 10.1109/LAWP.2025.3548310 Radiofrecuencia Antenas de reflector Metal-Only 3D Unit Cell for Reflectarrays with Independent Dual-Band Operation.