Examinando por Autor "Imaz Lueje, Borja"

Mostrando 1 - 8 de 8

A High-Throughput Deployable Antenna based on Not-Aligned Reflectarray Panels
(2024 IEEE International Symposium on Antennas and Propagation and ITNC-USNC-URSI Radio Science Metting, 2024-07-19) Imaz Lueje, Borja; Martinez-de-Rioja, Daniel; Rodríguez Pino, Marcos; Arrebola Baena, Manuel
This contribution describes a deployable large multi-faceted reflectarray to be embarked in different aerospace vehicles. The structure comprises several low-profile panels that are assembled to follow an equivalent parabolic reflector. An example of this antenna concept is designed to operate in Ka-band and dual-linear polarization. It provides high-gain, low-losses, and a bandwidth significantly higher than the one achieved with a conventional deployable reflectarray. Therefore, the proposed antenna exhibits high-throughput performance with integrability with the vehicle platform. Such features are of particular interest for space missions and some terrestrial communications.
A Multi-faceted Reflectarray onboard Aerospace Vehicle with Enhanced Bandwidth
(Comité Organizador y Científico XXXIX Simposio Nacional de la Unión Científica Internacional de Radio, URSI 2024. Escuela Politécnica de Cuenca. Universidad de Castilla-La Mancha, 2024-09-04) Imaz Lueje, Borja; Martinez-de-Rioja del Nido, Daniel; Rodríguez Pino, Marcos; Arrebola Baena, Manuel
This paper presents an electrically large multi-faceted aperture that can be folded and deployed onboard an aerospace vehicle. Following a single-offset configuration, the aperture comprises five low-profile panels assembled edge-to-edge, arranged following a parabolic curvature. The entire antenna structure is designed to generate a directive beam in Ka-band, working in dual-linear polarization. An electromagnetic characterization of this topology has been carried out, compared the results to the performance of an equivalent single facet reflector and a multi-faceted reflectarray composed of nine panels. The five panel multi-faceted structure features a directive pattern stable in-band, and a 1dB-gain bandwidth of 10%, significantly higher than in an equivalent single facet aperture. Compared with the nine-panel structure, it exhibits lower gain bandwidth but higher peak gain, similar beamwidth in-band and easier integrability with the vehicle platform.
Apuntes y Resumen de la Asignatura Señales y Sistema
(2024-11) Rey Escudero, Samuel; Imaz Lueje, Borja
Boletín de Ejercicios Señales y Sistemas – Grado en Ciencia e Ingeniería de Datos
(2024-11) Rey Escudero, Samuel; Imaz Lueje, Borja
Boletín de problemas, exámenes y soluciones de la asignatura Señales y Sistemas (GCID)
Design of electromagnetic skins based on multi-faceted reflectarrays for millimiter-wave coverage
(2025-03) Imaz Lueje, Borja; Martínez de Rioja Del Nido, Eduardo; Arrebola Baena, Manuel
In this contribution, low-profile electromagnetic skins based on reflectarray multi-faceted topologies have been designed to improve wireless communications in different 5G/6G mm-wave scenarios. The proposed structures comprise multiple panels, assembled edge-to-edge following the curve profile of different architectural elements (cylindrical corners or vaults). Working in the 28 GHz band and dual-linear polarization, the multi-faceted approach deflects the impinging beam coming from a base station to a certain direction or coverage. The results of this work demonstrate that the multifaceted approach can efficiently generate the required coverage in each scenario but increasing the integrability with the architectural elements of the environment compared to a traditional single-facet electromagnetic skin.
GCID-SyS. Prácticas de laboratorio (curso 23-24)
(2024-11) Rey Escudero, Samuel; Imaz Lueje, Borja
El repositorio de Prácticas de Señales y Sistemas del curso 22-23, creado por Samuel Rey Escudero y Borja Imaz Lueje de la Universidad Rey Juan Carlos, contiene códigos en MATLAB para ayudar a comprender conceptos de la asignatura. Contenido del Repositorio: Práctica 1: Sistemas continuos - Se centra en la representación gráfica de la convolución. - Incluye un manual y un archivo comprimido con el código necesario. Práctica 2: Sistemas discretos - Analiza sistemas en tiempo discreto y ejercicios relacionados. - Contiene un archivo en MATLAB LIVE EDITOR para resolver la práctica. Práctica 3: Introducción al Filtrado Digital - Procesa una señal de voz para eliminar un tono interferente usando un filtro. - Incluye un guion de la práctica, un archivo de audio y un código en MATLAB LIVE EDITOR. Cada práctica tiene como objetivo facilitar la comprensión de los conceptos teóricos y prácticos de señales y sistemas. > SWHID: swh:1:dir:256a31d41c8357436b5304fc1c6ac51f3a6faca6 > Repositorio: https://github.com/borjaimaz/SyS-Practicas_22-23.git
Large and deployable multi-faceted antennas based on single-layer reflectarrays
(2024-03) Imaz Lueje, Borja; Martinez de Rioja Del Nido, Daniel; Rodríguez Pino, Marcos; Arrebola Baena, Manuel
This paper presents two designs of electrically large multi-faceted structures composed by reflectarray panels. The former comprises rectangular panels assembled edge-toedge following a parabolic profile along the largest dimension of the aperture. The latter is composed of panels with different shapes, arranged to mimic the equivalent reflector in multiple planes. Both antennas operate in the Ka-band using a simple cell based on a single-layer substrate. The multi-faceted designs exhibit a substantial enhancement in the gain bandwidth compared to a conventional deployable reflectarray, maintaining the low-profile storage load and low losses of this type of antenna technology.
Transparencias de teoría y cuestiones utilizadas en la asignatura Señales y Sistemas (GCID)
(2024-11) Rey Escudero, Samuel; Imaz Lueje, Borja
Transparencias de teoría y cuestiones utilizadas en la asignatura Señales y Sistemas (GCID)