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oai:riuma.uma.es:10630/314072026-02-03T11:29:53Zcom_10630_2254col_10630_37953

00925njm 22002777a 4500 dc Segura-Gómez, Cleofás author Pérez-Escribano, Mario author Biedma-Pérez, Andrés author Palomares-Caballero, Ángel author Padilla, Pablo author 2024 This document presents different phase shifter designs implemented in contactless air-filled substrate-integrated waveguide (CLAF-SIW) technology. The phase shifters are based on unit cells that avoid leakage losses in the assembled layers and produce the desired phase shift along the waveguide. The unit cells are represented by waveguides whose lateral walls have double-mushroom structures, and phase-shifting elements are in their propagation zone. The proposed phase-shifting elements are integrated cavities, integrated cavities with patches, and integrated cavities with mushroom-like patches. Transitions are needed to match impedances between the waveguides loaded with phase-shifting elements and a reference CLAF-SIW. Other transitions are designed to measure the prototypes, from coplanar waveguide to SIW and SIW to CLAF-SIW. Finally, some prototypes are manufactured to provide an experimental validation of the proposed phase-shifting elements. Good agreement is obtained between the simulated and measured results for all the CLAF-SIW phase shifters in the frequency range between 30 and 50 GHz Cleofás Segura-Gómez, Mario Pérez-Escribano, Andrés Biedma-Pérez, Ángel Palomares-Caballero, Pablo Padilla, Contactless AF-SIW phase shifters based on periodic structures at mmWaves, AEU - International Journal of Electronics and Communications, Volume 179, 2024, 155320, ISSN 1434-8411, https://doi.org/10.1016/j.aeue.2024.155320 https://hdl.handle.net/10630/31407 https://doi.org/10.1016/j.aeue.2024.155320 Guías de ondas Contactless AF-SIW phase shifters based on periodic structures at mmWaves