Modelling Fully-Dielectric Metamaterials for OAM Generation
- Carlos Molero ,
- Miguel A Balmaseda-Márquez,
- Guido Valerio,
- Pablo Padilla,
- Ángel Palomares-Caballero,
- Carlos Molero
Miguel A Balmaseda-Márquez
Department of Signal Theory, Telematics and Communications, Uni-versidad de Granada
Guido Valerio
Laboratoire GeePs, Université Paris-Saclay, CentraleSupélec, CNRS
Pablo Padilla
Department of Signal Theory, Telematics and Communications, Uni-versidad de Granada
Ángel Palomares-Caballero
Institut d'Electronique et des Tech-nologies du numéRique (IETR), UMR CNRS 6164, INSA Rennes
Carlos Molero
Department of Signal Theory, Telematics and Communications, Uni-versidad de Granada
Abstract
The presented study introduces a semi-analytical circuit model to fully characterize a dielectric unit cell structure made by blocks instead of applying the effective medium theory. A fitting strategy os used to a obtain a better understanding of the properties of the unit cell. Then, the approach is used to develop a semi-analytical model, demonstrating a good agreement with the scattering parameters extracted from a full-wave simulator. By tuning the dielectric material, our model can describe the behaviour of unit cells with different permittivities and electrical sizes. Finally, as an application for the analyzed dielectric unit cells, transmitarrays to generate orbital angular momentum (OAM) waves are designed and 3D-printed. The measured results show good performance for different number of OAM modes at 31 GHz.10 Jan 2024Submitted to TechRxiv 22 Jan 2024Published in TechRxiv