2026-05-30T21:16:19Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/384512026-02-03T12:28:14Zcom_10630_2254col_10630_37959

Overcoming the Passivity Bounds in Communications Systems with Spacetime Modulations. Moreno-Rodríguez, Salvador Alex-Amor, Antonio Pérez-Escribano, Mario Valenzuela-Valdés, Juan Francisco Padilla, Pablo Molero, Carlos Electromagnetismo Espacio y tiempo In this paper, we exploit the extra degrees of freedom associated with including time as a design variable to create communication scenarios beyond the physical bounds of passive structures. We particularize the results to a time-modulated diffractive one-dimensional grating. By tuning the temporal modulation, we show that two different scenarios can lead to the same output angles but with different output frequencies or incidence angles. These results illustrate the potential of these metastructures as diffractive beamformers and frequency mixers. 2025-04-22T06:40:52Z 2025-04-22T06:40:52Z 2025-04-22T06:40:52Z 2025-04 conference output https://hdl.handle.net/10630/38451 eng 19th European Conference on Antennas and Propagation Estocolmo, Suecia Abril, 2025 http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional