Listar por autor "Padilla, Pablo"
Mostrando ítems 1-18 de 18
-
A 3D-printed Prototype of a Miniaturized Top-Metalized Rectangular Dielectric Resonator Antenna
Sofokleous, Paris; Herraiz Martínez, Francisco Javier; Paz, Eva; Márquez-Segura, Enrique
; Padilla, Pablo; Pérez-Escribano, Mario[et al.] (URSI, 2024-09)
This paper presents a 3D-printed prototype of a novel top-metalized Dielectric Resonator Antenna (DRA). The inclusion of top metallization induces a modification in the boundary conditions, resulting in a frequency reduction ... -
Addressing the 5G cell switch-off problem with a multi-objective cellular genetic algorithm
Luna, Francisco; Luque-Baena, Rafael Marcos; Martínez, Jesús; Padilla, Pablo; Valenzuela-Valdés, Juan Francisco (2018-07-16)
The power consumption foreseen for 5G networks is expected to be substantially greater than that of 4G systems, mainly because of the ultra-dense deployments required to meet the upcoming traffic demands. This paper deals ... -
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 parasitic modeling of diodes in the millimeter-wave band
Pérez-Escribano, Mario; Palomares-Caballero, Ángel; Padilla, Pablo; Valenzuela-Valdés, Juan Francisco; Márquez-Segura, Enrique (Elsevier, 2024-03-06)
This paper presents the extraction of an equivalent circuit model for PIN diodes and varactors in the millimeter waves. This circuit model is handy for new communication applications involving, for example, electronic beam ... -
Contactless AF-SIW phase shifters based on periodic structures at mmWaves
Segura-Gómez, Cleofás; Pérez-Escribano, Mario; Biedma-Pérez, Andrés; Palomares-Caballero, Ángel; Padilla, Pablo (Elsevier, 2024)
This document presents different phase shifter designs implemented in contactless air-filled substrate-integrated waveguide (CLAF-SIW) technology. The phase shifters are based on unit cells that avoid leakage losses in ... -
Gain-Reconfigurable Hybrid Metal-Graphene Printed Yagi Antenna for Energy Harvesting Applications
(2019-04-26)This paper presents a hybrid metal-graphene printed Yagi antenna with reconfigurable gain that operates in the 5.5-GHz band. The balun and the driven elements are made of copper, while the directors are made of graphene. ... -
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. ... -
Miniaturized Top-Metalized 3D-printed Rectangular Dielectric Resonator Antenna.
Herraiz Martínez, Francisco Javier; Pérez-Escribano, Mario; Sofokleous, Paris; Padilla, Pablo; Márquez-Segura, Enrique (2024)
This paper introduces a novel top-metalized Dielectric Resonator Antenna (DRA). The inclusion of top metallization induces a modification in the boundary conditions, resulting in a frequency reduction in the fundamental ... -
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 ... -
Optimized Varactor Parasitic Modelling in the Millimeter-Wave Band.
Pérez-Escribano, Mario; Palomares-Caballero, Ángel; Padilla, Pablo; Valenzuela-Valdés, Juan Francisco (2023)
This work explores the utilization of varactors in the millimeter-wave (mm-wave) band, specifically focusing on their application in voltage-controlled reconfigurable devices. Varactors, or variable capacitors, can adjust ... -
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 ... -
Phase Shifter for Millimeter-Wave Frequency Range Based on Glide Symmetric Structures
(2019-03-13)The use of glide symmetry in radiofrequency devices to introduce dispersive effects has been recently proposed and demonstrated. One of these effects is to control the propagation constant of the structure. Here, we propose ... -
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 ... -
Redes de sensores seguras y eficientes con beamforming
Valenzuela-Valdés, Juan Francisco; Luna, Francisco; Padilla, Pablo; Padilla, José Luis; Luque-Baena, Rafael Marcos (2017-07-03)
Mejorar la eficiencia energética de las redes de sensores (WSN, por sus siglas en inglés) es uno de sus principales objetivos de diseño. De entre las distintas líneas de trabajo existentes en esta área, el uso del ... -
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 ...