Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	On the Mobility Effect in UAV-Mounted Absorbing Metasurfaces: A Theoretical and Experimental Study
Δημιουργός/Συγγραφέας:	Pitilakis, Alexandros Tyrovolas, Dimitrios Mekikis, Prodromos-Vasileios Tegos, Sotiris A. Papadopoulos, Alexandros Tsioliaridou, Ageliki [EL] Τσιλιπάκος Οδυσσέας[EN] Tsilipakos, Odysseas Manessis, Dionysios Ioannidis, Sotiris Kantartzis, Nikolaos V. Akyildiz, Ian F. Liaskos, Christos K.
Ημερομηνία:	2023
Γλώσσα:	Αγγλικά
ISSN:	2169-3536
DOI:	10.1109/ACCESS.2023.3299379
Περίληψη:	In this work, we focus on the theoretical modeling and experimental evaluation of absorbing metasurfaces mounted on unmanned aerial vehicles (UAVs) as facilitators for secure wireless communication channels. Specifically, we present a network architecture based on UAV-mounted metasurfaces and conduct a comprehensive analysis of its components. Furthermore, by utilizing physical optics, namely the FresnelKirchhoff diffraction formula, we develop a comprehensive path loss model that accurately calculates the scattering of wavefronts from metasurfaces with arbitrary configurations; this model enables the quantification of path loss and mobility effects, including pointing accuracy, misalignment, and UAV flying stability, for both near- and far-field conditions. Finally, experimental measurements are conducted using a state-ofthe-art static absorbing metasurface and a commercial UAV in an anechoic chamber environment and close agreement between theoretical and experimental results, down to the radiative near-field region, is illustrated. Specifically, our findings indicate that absorbing metasurfaces can act as notch filters with minimal impact on pointing and positioning accuracy, exhibiting a 3 dB beamwidth of ±15◦ compared to ideal static conditions.
Τίτλος πηγής δημοσίευσης:	IEEE Access
Τόμος/Κεφάλαιο:	11
Σελίδες:	79777 - 79792
Θεματική Κατηγορία:	[EL] Οπτική. Φώς[EN] Optics. Light [EL] Φυσική[EN] Physics
Λέξεις-Κλειδιά:	Metasurface Reconfigurable intelligent surface (RIS) Unmanned aerial vehicle (UAV) Mobility Physical optics Path loss model Diffraction Fresnel-Kirchhoff
EU Grant:	European Union’s Horizon 2020 Research and Innovation Program
EU Grant identifier:	Grant 2022—Project WISAR Grant 952690 (CYRENE) Grant 891515 (HERMES)
Όροι και προϋποθέσεις δικαιωμάτων:	This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. For more information, see https://creativecommons.org/licenses/by-nc-nd/4.0/
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://ieeexplore.ieee.org/document/10196450
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο