This contribution presents the analysis and design of a novel class of metasurface-based antennas, whose radiative capabilities are enabled by the properties of the temporal and time-switched metamaterials. In particular, we consider a thin metasurface supporting the propagation of a surface wave that can switch instantaneously its surface impedance between two different values, resulting in a temporal interface. We demonstrate that the surface wave is instantaneously coupled to free space realizing a directive polychromatic beam at much higher frequency with respect to the frequency of the original surface wave. Analytical formulations and numerical simulations are provided to predict and verify the frequency upshift and the radiation characteristics of the proposed novel antenna.
Stefanini, L., Ramaccia, D., Barbuto, M., Karamirad, M., Longhi, M., Monti, A., et al. (2024). Time-switched metasurface antenna. In IEEE Antennas and Propagation Society, AP-S International Symposium (Digest) (pp.1035-1036). 345 E 47TH ST, NEW YORK, NY 10017 USA : Institute of Electrical and Electronics Engineers Inc. [10.1109/ap-s/inc-usnc-ursi52054.2024.10686041].
Time-switched metasurface antenna
Stefanini, Luca;Ramaccia, Davide;Barbuto, Mirko;Karamirad, Mohsen;Monti, Alessio;Vellucci, Stefano;Toscano, Alessandro;Bilotti, Filiberto
2024-01-01
Abstract
This contribution presents the analysis and design of a novel class of metasurface-based antennas, whose radiative capabilities are enabled by the properties of the temporal and time-switched metamaterials. In particular, we consider a thin metasurface supporting the propagation of a surface wave that can switch instantaneously its surface impedance between two different values, resulting in a temporal interface. We demonstrate that the surface wave is instantaneously coupled to free space realizing a directive polychromatic beam at much higher frequency with respect to the frequency of the original surface wave. Analytical formulations and numerical simulations are provided to predict and verify the frequency upshift and the radiation characteristics of the proposed novel antenna.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
