Exploració per autor "Jofre Roca, Lluís"
Ara es mostren els items 78-97 de 258
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Design of a dielectric flat lens antenna for 60 GHz WPAN applications
Imbert Villà, Marc; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2013)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper we present the design of a dielectric flat lens antenna to operate in the 60 GHz band for WPAN applications. In order to overcome the specific atmospheric attenuation, which characterizes the propagation in ... -
Design of minimum nonlinear distortion reconfigurable antennas for next-generation communication systems
Ramírez Arroyave, Germán Augusto; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís; Araque Araque, Javier Leonardo; Cetiner, Bedri Artug; Jofre Roca, Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2022-03-01)
Capítol de llibre
Accés obertNonlinear effects in the radio front-end can degrade communication quality and system performance. In this paper we present a new design technique for reconfigurable antennas that minimizes the nonlinear distortion and ... -
Design of minimum nonlinear distortion reconfigurable antennas for next-generation communication systems
Ramírez Arroyave, Germán Augusto; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís; Araque Araque, Javier Leonardo; Cetiner, Bedri Artug; Jofre Roca, Lluís (2021-04-01)
Article
Accés obertNonlinear effects in the radio front-end can degrade communication quality and system performance. In this paper we present a new design technique for reconfigurable antennas that minimizes the nonlinear distortion and ... -
Desplegament de recursos en línea per a l’avaluació i l’autoaprenentage dels alumnes, i foment de l’especialització i competències transversals en el màster MERIT
Pradell i Cara, Lluís; Cardama Aznar, Ángel; Canal Bienzobas, Fernando; Jofre Roca, Lluís; Junyent Giralt, Gabriel; Herranz Luis, Jaime; Mallorquí Franquet, Jordi Joan; Nadeu Camprubí, Climent; Pagès Zamora, Alba Maria; Pradell i Cara, Lluís; Rius Casals, Juan Manuel; Rodríguez Fonollosa, Javier; Romeu Robert, Jordi; Coderch Collell, Marcel; Kerans, Mary Ellen; Law, Carolyn; García Hernández, Antonio; Gutiérrez Martos, David; Hernández Bonet, Antoni; Ferrer Bosch, Anna; Pérez Trufero, Javier; Torre Lara, Jordi de la; Torres Matabosch, Núria (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-02-11)
Comunicació de congrés / Text en actes de congrés
Accés obertEl projecte es desenvolupa en el marc de la titulació oficial de màster MERIT del Departament de Teoria del Senyal i Comunicacions. El màster, orientat a la recerca i integrat dins del programa Erasmus Mundus, presenta ... -
Diagnóstico de antenas a partir de medidas en campo próximo cilíndrico
Jofre Roca, Lluís; Cardama Aznar, Ángel; Ferrando Bataller, Miquel (Universidad Politécnica de Madrid (UPM), 1988)
Text en actes de congrés
Accés obertThe purpose of this study is to show the antenna imaging capabilities of a near field measurement system. From the antenna near field data, the aperture field is reconstructed in the first instance, and then the source ... -
Diagnóstico de arrays. Estudio comparativo entre campo próximo rectangular y cilíndrico
Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (Unión Científica Internacional de Radio (URSI), 1990)
Text en actes de congrés
Accés obert -
Dielectric flat lenses with cylindrically distributed parameters for millimeter-wave applications
Imbert, M.; Romeu Robert, Jordi; Jofre Roca, Lluís (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 dielectric flat lens with the effective relative permittivity cylindrically distributed is presented. In order to achieve high-data rate wireless communications for ... -
Direct connection of uni-traveling-carrier photodiodes to antennas for frequency reconfigurable fiber-radio transmission in the Ka band
Vega Piña, Sara; Ballesteros Sánchez, Christian; Caillaud, Christophe; Lanteri, Delphine; Mekhazni, Karim; Santos Blanco, M. Concepción; Pradell i Cara, Lluís; Jofre Roca, Lluís (2024-07-01)
Article
Accés obertA compact photonically-driven wireless emitter based on a Uni-Traveling-Carrier photodiode (UTC-PD) which directly connects to a short asymmetrical inductive dipole (SAID) antenna is presented. The design exploits the ... -
Diseño de bocinas ridge conformadas usando el metodo incremental
Blanch Boris, Sebastián; Jofre Roca, Lluís (Universidad de Málaga, 1992)
Text en actes de congrés
Accés obert -
Diseño de un alimentador primario para dos frecuencias y dos polarizaciones
Ferrando Bataller, Miquel; Jofre Roca, Lluís (Universidad Politécnica de Madrid (UPM), 1988)
Text en actes de congrés
Accés obertPrimary feeds have been designed to operate simultaneously in two frecuency bands and two cross-polarizations. The multimode generalized scattering matrix has been used to characterize the circular waveguide discontinuity. ... -
Diseño del módulo emisor-receptor para un prototipo clínico de tomógrafo de microondas
Torres Viñals, Jordi; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991)
Text en actes de congrés
Accés obertThis paper presents the design of an emitter-receiver system for a clinical microwave tomographic scanner prototype. A new design has been considered to reduce the problems of a prior experimental prototype in the department, ... -
Diseño interactivo de formas de baja detectabilidad radar
Rius Casals, Juan Manuel; Jofre Roca, Lluís; Vall-Llossera Ferran, Mercedes Magdalena (1991)
Text en actes de congrés
Accés obertRadar cross section (RCS) of complex targets can be obtained in real time using the hardware capabilities of a high performance graphic workstation. Target geometry is modelled by a computer-aided design package. First ... -
Diseño optimizado de agrupaciones de antenas planas
Clavera, Jordi; Jiménez, Jesús; Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís (Unión Científica Internacional de Radio (URSI), 1990)
Text en actes de congrés
Accés obert -
Diseño y construcción de un sistema compact range reducido hasta 40 ghz
Xarrié, Jaume; Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel (Unión Científica Internacional de Radio (URSI), 1990)
Text en actes de congrés
Accés obertThe design of a polarimetric Compact Range system covering 12-40 GHz is presented. Includes a preliminar error analysis, feeder design, and plane wave evaluation. -
Diseño y evaluación de un sistema de medida RCS
Blanch Boris, Sebastián; Xarrié, Jaume; Broquetas Ibars, Antoni; Fabregas Canovas, Francisco Javier; Jofre Roca, Lluís (Unión Científica Internacional de Radio (URSI), 1990)
Text en actes de congrés
Accés obertA polarimetric compact range RCS measurement system covering 8 to 40 GHZ is presented. The sensitivity is evaluated both theoretically and experimentally. Some RCS and ISAR results are included. -
Efecto de errores aleatorios en las medidas en campo próximo en coordenadas cilíndricas
Romeu Robert, Jordi; Jofre Roca, Lluís (1991)
Text en actes de congrés
Accés obertThe far field noise due to a random near field noise is an stochastic process, and it will be shown that for a white gaussian space stationary near field noise, the far field noise is a gaussian non-stationary in elevation ... -
Effect of random errors in antenna cylindrical near-field measurements
Romeu Robert, Jordi; Jofre Roca, Lluís (Institution of Electrical Engineers, 1991-02)
Article
Accés obertA closed expression for the autocorrelation of the far field noise due to random near field noise in a cylindrical near to far field transformation is derived. This expression is employed to obtain bounds for the computed ... -
Effect of random errors in cylindrical
Romeu Robert, Jordi; Jofre Roca, Lluís (. 1991 IEEE AP-S INTERNATIONAL SYMPOSIUM, 1991)
Text en actes de congrés
Accés obertExpressions have been derived previously to predict the effect of random errors in planar near-field measurements. Similar equations for cylindrical near-field measurements are not available. Random errors are due to A/D ... -
Efficient parametric characterization of the dynamic performance of an RFID IC
Capdevila Cascante, Santiago; Jofre Roca, Lluís; Romeu Robert, Jordi; Bolomey, J.Ch (2012)
Article
Accés restringit per política de l'editorialIn this letter, a measurement technique for a complete parametric characterization of the input impedance of an RFID IC is presented. The use of an SPDT switch to modulate the signal from the network analyzer provides ... -
El "Espacio Innovador" y la red
Jofre Roca, Lluís; Solé Parellada, Francesc; Sabaté i Garriga, Ferran; Berenguer Sau, Jordi; Marqués Acosta, Fernando; Romeu Robert, Jordi; Torres Viñals, Jordi (Cátedra Telefónica-UPC, 2005-11)
Llibre
Accés obert