28 citations · 138 across the 12 of their papers we have counts for
12 papers
Gain and One-Way Propagation in Synthetically Moving non-Foster Gratings
Antonio Alex-Amor, Carlos Molero, Mario G. Silveirinha
In this paper, we analyze the electromagnetic properties of space-time grooved metal surfaces governed by uniform-velocity modulations. We begin by deriving the electromagnetic fie…
Time-Controlled Resonances in 2-D Metasurfaces via Equivalent Circuits
J. Rafael Sánchez-Martínez, Mario Pérez-Escribano, Antonio Alex-Amor +2
This work introduces a semi-analytical frequency-domain framework for the analysis of two-dimensional, time-modulated (2+1)-D metasurfaces controlled by PIN diodes. The formulation…
Space-time Metallic Metasurfaces for Frequency Conversion and Beamforming
Salvador Moreno-Rodríguez, Antonio Alex-Amor, Pablo Padilla +2
This paper details a class of metal-based space-time metasurfaces for application in wireless communications scenarios. Concretely, we describe space-time metasurfaces that periodi…
Analytical Framework to Model Reconfigurable Metasurfaces including Lumped Elements
Mario Pérez-Escribano, Salvador Moreno-Rodríguez, Carlos Molero +3
This paper presents an analytical framework, based on Floquet modal expansions of the electromagnetic fields and equivalent circuits, to model reconfigurable metasurfaces loaded wi…
Three-Dimensional Fully Metallic Dual Polarization Frequency Selective Surface Design Using Coupled-Resonator Circuit Information
Ignacio Parellada-Serrano, Mario Pérez-Escribano, Carlos Molero +2
This work employs a new approach to analyze coupled-resonator circuits to design and manufacture a fully metallic dual polarization frequency selective surface (FSS). The proposed…
Analytical Equivalent Circuits for Three-dimensional Metamaterials and Metagratings
Antonio Alex-Amor, Salvador Moreno-Rodríguez, Pablo Padilla +2
In recent times, three-dimensional (3D) metamaterials have undergone a revolution driven mainly by the popularization of 3D-printing techniques, which has enabled the implementatio…
Analysis of Metallic Space-Time Gratings using Lorentz Transformations
Antonio Alex-Amor, Carlos Molero, Mário G. Silveirinha
This paper presents an analytical framework for the study of scattering and diffraction phenomena in spacetime-modulated metallic gratings. Using a Lorentz transformation, it is sh…
Time-periodic Metallic Metamaterials defined by Floquet Circuits
Salvador Moreno-Rodríguez, Antonio Alex-Amor, Pablo Padilla +2
In this paper, we study the scattering and diffraction phenomena in time-modulated metamaterials of metallic nature by means of Floquet equivalent circuits. Concretely, we focus on…
Diffraction Phenomena in Time-varying Metal-based Metasurfaces
Antonio Alex-Amor, Salvador Moreno-Rodriguez, Pablo Padilla +2
This paper presents an analytical framework for the analysis of time-varying metal-based metamaterials. Concretely, we particularize the study to time-modulated metal-air interface…
3-D Metamaterials: Trends on Applied Designs, Computational Methods and Fabrication Techniques
Antonio Alex-Amor, Angel Palomares-Caballero, Carlos Molero
Metamaterials are artificially engineered devices that go beyond the properties of conventional materials in nature. Metamaterials allow the creation of negative refractive indexes…
Cross-polarization Control in FSSs by means of an Equivalent Circuit Approach
Carlos Molero, Antonio Alex-Amor, Francisco Mesa +2
This paper presents an efficient equivalent circuit approach (ECA), based on a Floquet modal expansion, for the study of the co- and cross-polarization in frequency selective surfa…
Exploring the Potentials of the Multi-modal Equivalent Circuit Approach for Stacks of 2-D Aperture Arrays
Antonio Alex-Amor, Francisco Mesa, Ángel Palomares-Caballero +2
Many frequency selective surface (FSS) structures are based on the use of a single periodic array of slot/apertures in a conducting sheet embedded in a layered medium. However, it…