Pérez Quintana, DayanAguirre Gallego, ErikOlariaga Jauregui, EduardoKuznetsov, Sergei A.Lapanik, Valeri I.Sutormin, Vitaly S.Zyryanov, Victor YaMarcotegui Iturmendi, José AntonioBeruete Díaz, Miguel2024-05-282024-05-282024Perez-Quintana, D., Aguirre, E., Olariaga, E., Kuznetsov, S. A., Lapanik, V. I., Sutormin, V. S., Zyryanov, V. Y., Marcotegui, J. A., Beruete, M. (2023) Reconfigurable millimeter-wave reflectarray based on low loss liquid crystals. IEEE Transactions on Antennas and Propagation, 72(1), 531-541. https://doi.org/10.1109/TAP.2023.3329666.0018-926X10.1109/TAP.2023.3329666https://academica-e.unavarra.es/handle/2454/48210This article reports on the development and evaluation of a reconfigurable millimeter-wave reflectarray (RA) based on liquid-crystal (LC) substrate operating in the D-band (105–125 GHz). The RA is composed of a high-impedance surface (HIS) with a meta-array of 33 × 29 patches on a 2-mm-thick quartz substrate, separated from the ground plane (GP) by a 40-µm-thick LC layer. A novel LC composition with low dielectric losses (<0.003) and high dielectric anisotropy (>1.3) has been developed for operation at millimeter waves. The results demonstrate a reflection phase tunability of 210◦ and low insertion losses of 2.5 dB. Furthermore, the device was demonstrated as a proof of concept for 1-D beam-steering applications, exhibiting an operational bandwidth of 12 GHz.application/pdfeng© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.Beam steeringD-bandHigh-impedance surfaces (HISs)Liquid crystals (LCs)Millimeter wavesReconfigurable reflectarray (RA)Artículo / Artikulua2024-05-28Acceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess