Exploració per autor "Jofre Roca, Lluís"
Ara es mostren els items 116-135 de 254
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High impedance monopole antenna for indoor terahertz communication system
Yazgan, Ayhan; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Comunicació de congrés
Accés restringit per política de l'editorialIn this study, a wideband terahertz antenna for indoor wireless communication systems is proposed. Antenna has high input impedance which is reasonable for terahertz systems due to the high output impedance of terahertz ... -
High-frequency RCS of complex radar targets in real time
Rius Casals, Juan Manuel; Ferrando Bataller, Miguel; Jofre Roca, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-09-01)
Article
Accés obertThis paper presents a new and original approach for computing the high-frequency radar cross section (RCS) of complex radar targets in real time with a 3-D graphics workstation. The aircraft is modeled with I-DEAS solid ... -
Hybrid massive MIMO for urban V2I: Sub-6 GHz vs mmWave performance assessment
Pfadler, Andreas; Ballesteros Sánchez, Christian; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020-03)
Article
Accés obertThe relevance of vehicle communications in next-generation networks entails the necessity of studying their performance in the framework of upcoming massive architectures. In this regard, a study of the wireless channel ... -
Identificación selectiva de centros de dispersion radar utilizando tecnicas ISAR
Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991)
Text en actes de congrés
Accés obertThis paper presents an ISAR technique which is able to identify the scattering mechanisms in the target structure wich are responsible of each significant lo be of the RCS vs. angle diagram. The technique is based on a ... -
In-cabin 120 GHz radar system for functional human breathing monitoring in a 3D scenario
López Montero, María José; Aguasca Solé, Alberto; Romeu Robert, Jordi; Jofre Roca, Lluís (Íñigo Cuiñas Gómez, 2021)
Text en actes de congrés
Accés obertDriving is one of the activities that takes a significant part of a person’s time, that is why monitoring vital signs is useful for the wellness of the occupants of the vehicle. One of the vital signs that provides more ... -
In-cabin MIMO radar system for human dysfunctional breathing detection
López Montero, María José; Palacios Arias, César Augusto; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2022-12-15)
Article
Accés obertThe integration of wireless sensors into the automotive industry is making vehicles increasingly safe and autonomous. At present, vehicles are equipped with external sensors that facilitate maneuverability and braking and ... -
Increased dynamic range for RFID EM-field measurements
Capdevila Cascante, Santiago; Romeu Robert, Jordi; Jofre Roca, Lluís; Bolomey, Jean Charles (Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper presents a new methodology to measure the electromagnetic (EM) field using RFID tags, overcoming the limitations in dynamic range arisen by the conventional excitation of RFID tags. The methodology consists in ... -
Interference rejection using frequency and pattern reconfigurable antennas
Rodrigo López, Daniel; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialInterference rejection by taking advantage of the radiation pattern diversity of a reconfigurable antenna is considered. It is proposed to use simultaneously frequency and radiation reconfiguration to extend interference ... -
Isofrequency-reconfigurable 8-bit RF repeater
Díaz Tapia, Edgar; Grau, Alfred; Rodriguez De Luis, Javier; de Flaviis, Franco; Jofre Roca, Lluís (2011-11-02)
Article
Accés restringit per política de l'editorialA novel isofrequency-reconfigurable RF repeater operating at 4.5 GHz is presented. The repeater uses a total of eight reconfigurable parasitic dipole elements to enhance and reconfigure the isolation level between the ... -
Ku-band flat lens design for satellite TV applications
Imbert Villà, Marc; Romeu Robert, Jordi; Jofre Roca, Lluís; Papió, Anna; de Flaviis, Franco (Institute of Electrical and Electronics Engineers (IEEE), 2014)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, the design of a dielectric flat lens to operate in the Ku-band for satellite communications is presented. Modern dishes intended for home television are generally bulky and heavy. Moreover, the costs of ... -
La adaptacion del plan nacional de evaluacion de la calidad de las universidades al contexto de una universidad con estructura matricial de centros y departamentos: el caso de la universidad politecnica de cataluña
Jofre Roca, Lluís; Rotger, Jordi (1998-05)
Article
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La ciclicidad en los nuevos planes de estudio
Correig Blanchar, Francesc Xavier; Jofre Roca, Lluís (1991-07)
Article
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Lens based switched beam antenna for a 5G smart repeater
Romeu Robert, Jordi; Blanch Boris, Sebastián; Pradell i Cara, Lluís; Barlabe Dalmau, Antoni; Rius Casals, Juan Manuel; Albert Galí, Miquel; Jofre Roca, Lluís; Mazzucco, Christian; Flamini, Roberto (2023-10)
Article
Accés obertA 16 switched beam lens based antenna with a coverage area of ±30° in the horizontal plane and from 0 to -20° in the vertical plane has been built and tested. The intended use of the antenna is as part of a smart repeater ... -
Linear and Circular UWB Millimeter-Wave and Terahertz Monostatic Near-Field Synthetic Aperture Imaging
solano perez, jose antonio; Martinez-Ingles, Maria-Teresa; Molina-Garcia Pardo, Jose Maria; Romeu Robert, Jordi; Jofre Roca, Lluís; Rodríguez, José Victor; Mateo-Aroca, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2020-03-10)
Article
Accés obertMillimeter-wave and terahertz frequencies offer unique characteristics to simultaneously obtain good spatial resolution and penetrability. In this paper, a robust near-field monostatic focusing technique is presented and ... -
Linear array arrangement for microwave tomography
Peronnet, Guy; Bolomey, Jean Charles; Jofre Roca, Lluís (1984-09-01)
Article
Accés obertRecent developments both in measurement techniques and reconstruction algorithms have shown the possibility of quasi-real time microwave tomography. These technical developments always require more sophisticated experimental ... -
Linear array diagnostic from near-field measurements
Romeu Robert, Jordi; Jofre Roca, Lluís; Soneira Ferrando, M. José; Clavera, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 1989)
Text en actes de congrés
Accés obertThe authors present an inversion procedure to obtain the current distribution on a linear array from a near-field measurement. Numerical simulations were performed for a 50-element linear array. Single elements are ... -
LTCC-based dielectric flat lens performance evaluation at 94 GHz
Imbert Villà, Marc; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís; Baquero Escudero, M. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
Text en actes de congrés
Accés restringit per política de l'editorialThe design and performance evaluation of an inhomogeneous LTCC-based dielectric flat lens at 94 GHz is presented. A previously introduced dielectric flat lens design with its effective permittivity (r) circularly distributed ... -
Magnetoelectric dipole antenna framework supporting orbital angular momentum modes
Jofre Cruanyes, Marc; Akazzim, Youness; Blanch Boris, Sebastián; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (2024)
Article
Accés restringit per política de l'editorialThe ability to utilize resources to meet the need of growing diversity of communication services and user behavior marks the future of cognitive wireless communication systems. Cognitive wireless technologies for vehicular ... -
Matching layer design to improve the performance of an inhomogeneous dielectric flat lens at millimeter-wave frequencies
Imbert Villà, Marc; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, the design of a matching layer to increase the maximum achievable gain, reduce the back-radiation, and enhance the bandwidth performance of a dielectric flat lens antenna for millimeter-wave applications is ... -
Medical imaging with a microwave tomographic scanner
Jofre Roca, Lluís; Hawley, M S; Broquetas Ibars, Antoni; Reyes Davó, Elías de Los; Ferrando Bataller, Miquel; Elias Fusté, Antoni (1990-03)
Article
Accés obert