Listar por autor "Molero, Carlos"
Mostrando ítems 1-14 de 14
-
Analytical Circuit Approach for (2+1)D Structures: Application to Spacetime Metasurfaces
Moreno-Rodríguez, Salvador; Pérez-Escribano, Mario
; Padilla, Pablo; Valenzuela-Valdés, Juan Francisco; Alex-Amor, Antonio; Molero, Carlos[et al.] (URSI, 2024-09)
Historically, scientists and engineers have focused their studies on finding analytical models that allow accurate modeling of the electromagnetic response of radiant devices. Commercial software based on numerical ... -
Analytical Framework to Model Reconfigurable Metasurfaces including Lumped Elements.
Pérez-Escribano, Mario; Moreno-Rodríguez, Salvador; Molero, Carlos; Valenzuela-Valdés, Juan Francisco; Padilla, Pablo; Alex-Amor, Antonio; Pérez-Escribano, Mario[et al.] (IEEE Transactions on Circuits and Systems II: Express Briefs, 2023-11-06)
This manuscript introduces an analytical framework for the design of reconfigurable metasurfaces rooted in 2D periodic structures. Incorporating lumped elements into the model streamlines the design process for such devices, ... -
Analytical Method to Model Spatiotemporal Metasurfaces.
Pérez-Escribano, Mario; Moreno-Rodríguez, Salvador; Alex-Amor, Antonio; Valenzuela-Valdés, Juan Francisco; Padilla, Pablo; Molero, Carlos[et al.] (2024)
This work introduces a theoretical framework to develop fully-analytical and multi-modal equivalent circuits that are applicable to spatiotemporal metasurfaces. Here, time is considered a periodic variable. Thus, classical ... -
Broadband 1-bit Reconfigurable Intelligent Surface at Millimeter Waves: Overcoming PIN-Diode Degradation with Slotline Ring Topology.
Palomares-Caballero, Ángel; Pérez-Escribano, Mario; Molero, Carlos; Padilla, Pablo; García-Vigueras, María; Gillard, Raphaël[et al.] (IEEE, 2025)
This paper explains the non-idealities that arise when using PIN diodes at millimeter-wave frequencies and the important limitations that they bring in classical configurations of 1-bit slotline reconfigurable unit cells. ... -
Broadband Frequency Selective Surface Absorber based on Laser-Induced Graphene for Applications from Ku-band to Q-band.
Ortiz Ruiz, Sergio; Pérez-Escribano, Mario; Moreno-Rodríguez, Salvador; Palomares-Caballero, Ángel; Valenzuela-Valdés, Juan Francisco; García-Ruiz, Francisco Javier; Molero, Carlos[et al.] (IEEE, 2025)
This work presents the design of a broadband frequency-selective surface absorber (FSSA) using laser-induced graphene (LIG). This type of resistive material composed of porous graphene has been analyzed, and its performance ... -
Metal-Only 3D Unit Cell for Reflectarrays with Independent Dual-Band Operation
Pérez-Escribano, Mario; Biedma-Pérez, Andrés; Parellada-Serrano, Ignacio; Palomares-Caballero, Ángel; Molero, Carlos; Rodríguez-Padilla, Pablo[et al.] (2024)
En este artículo se presenta un reflectarray solo metálico basado en una celda unidad tridimensional con capacidad de trabajar en doble banda. La celda unidad 3D es una guía de onda cuadrada cuyas paredes verticales incluyen ... -
Metal-Only 3D Unit Cell for Reflectarrays with Independent Dual-Band Operation.
Biedma-Pérez, Andrés; Pérez-Escribano, Mario; Parellada-Serrano, Ignacio; Palomares-Caballero, Ángel; Padilla, Pablo; García-Vigueras, María; Molero, Carlos[et al.] (IEEE, 2025)
This paper presents a metal-only reflectarray based on a 3D unit cell with dual-band capability. The 3D unit cell is a square waveguide whose vertical walls include resonator elements with independent frequency performance. ... -
Non-Sinusoidal Temporal Modulation in Circuits for Non-Reciprocity and Power Transfer.
Sánchez-Martínez, Juan Rafael; Pérez-Escribano, Mario; Ortiz Ruiz, Sergio; Valenzuela-Valdés, Juan Francisco; Padilla, Pablo; Molero, Carlos[et al.] (2025-04)
In this paper, we demonstrate the improvement in circuit performance when time-varying circuits are modulated by non-sinusoidal waveforms. Specially we focus on triangular and rectangular modulations. By this, bandpass ... -
Novel Frequency-Selective Surface Absorber based on Laser-Induced Graphene
Ortiz Ruiz, Sergio; Moreno-Rodríguez, Salvador; Pérez-Escribano, Mario; Palomares-Caballero, Ángel; Pasadas, Francisco; Valenzuela-Valdés, Juan Francisco; García-Ruiz, Francisco J.; Molero, Carlos[et al.] (URSI, 2024-09)
Este trabajo propone una técnica para el diseño de absorbedores de microondas y ondas milimétricas mediante la combinación de superficies selectivas en frecuencia (FSSs) y grafeno inducido por láser (LIG). En primera ... -
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[et al.] (2025-04)
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 ... -
Puesta en marcha de un sistema de caracterización de materiales en la banda de milimétricas
Ortiz Ruiz, Sergio; Pérez-Escribano, Mario; Moreno-Rodríguez, Salvador; García-Ruiz, Francisco J.; Molero, Carlos; Padilla, Pablo; Márquez-Segura, Enrique[et al.] (2023)
En este trabajo se describe el proceso seguido para la puesta en marcha de un sistema de caracterización de la permitividad y permeabilidad complejas de materiales en la banda de frecuencias de ondas milimétricas. Para ... -
Reference-Plane Invariant Free Space Dielectric Material Characterization up to 330 GHz.
Moreno-Rodríguez, Salvador; Pérez-Escribano, Mario; Ortiz Ruiz, Sergio; Alex-Amor, Antonio; Plaza-Gallardo, Borja; García-Ruiz, Francisco J.; Molero, Carlos[et al.] (2024)
This paper describes the process followed to implement a system to characterize the complex permittivity of materials in the 10-330 GHz frequency band. Firstly, the method used and the system's calibration process are ... -
Setup for Material Characterization in the 110-170 GHz Band.
Moreno-Rodríguez, Salvador; Pérez-Escribano, Mario; Ortiz Ruiz, Sergio; García-Ruiz, Francisco J.; Plaza-Gallardo, Borja; Molero, Carlos; Márquez-Segura, Enrique[et al.] (2024)
This work outlines the procedure to establish a system for assessing materials' complex permittivity and permeability within the 110-170 GHz frequency range. We present the employed methodology and the calibration procedure ... -
Three-Dimensional Fully Metallic Dual Polarization Frequency Selective Surface Design Using Coupled-Resonator Circuit Information.
Parellada-Serrano, Ignacio; Pérez-Escribano, Mario; Molero, Carlos; Padilla, Pablo; De la Rubia, Valentín (IEEE, 2024)
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 filtering structure is composed of a series ...