Exploració per autor "Jofre Roca, Lluís"
Ara es mostren els items 180-199 de 254
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Paquete de software para la transformación y análisis de diagramas de radiación a partir de medidas de campo próximo en coordenadas cilíndricas
Romeu Robert, Jordi; Rius Casals, Juan Manuel; Clavera, J; Jofre Roca, Lluís; Alemany, J (Unión Científica Internacional de Radio (URSI), 1989)
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Accés obertA Software package for cilyndrical near field far field antenna transformation is presentad. The package includes radiation pattern analysis and high-quality graphics display. -
Parasitic layer-based reconfigurable antenna design by multi-objective optimization
Yuan, Xiaoyan; Li, Zhouyuan; Rodrigo López, Daniel; Mopidevi, Hema Swaroop; Kaynar, Oguz; Jofre Roca, Lluís; Cetiner, Bedri Artug (2012-06)
Article
Accés restringit per política de l'editorialA parasitic layer-based multifunctional reconfigurable antenna (MRA) design based on multi-objective genetic algorithm optimization used in conjunction with full-wave EM analysis is presented. TheMRA is capable of ... -
Passive RFID based sensing
Capdevila Cascante, Santiago; Jofre Roca, Lluís; Romeu Robert, Jordi; Bolomey, J.Ch. (IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialThe principle of communication of passive RFID, which relies on the Modulated Scattering Technique (MST) to transmit the information from the tag to the reader, opens a way to enable conventional RFID for sensing purposes, ... -
Pérdidas de acoplamiento en juntas de fibras ópticas monomodo
Cardama Aznar, Ángel; Carrión Isbert, Antonio; Ferrando Bataller, Miquel; Jofre Roca, Lluís (1980)
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Accés obertWe present results for the coupling efficiencies of the HE11 mode of monomode optical fiber joints with misalignements in the axis or different radius of the core, obtained by a modal analysis of the discontinuity. -
Pixel reconfigurable antennas: towards low-complexity full reconfiguration
Rodrigo López, Daniel; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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Accés restringit per política de l'editorialThe explosive growth of wireless communications has brought new requirements in terms of compactness, mobility and multi-functionality that make reconfigurable antennas excellent candidates for future wireless networks. ... -
Planar and cylindrical active microwave temperature imaging...
Rius Casals, Juan Manuel; Jofre Roca, Lluís; Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-12-02)
Article
Accés obertA comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ... -
Planar and cylindrical active microwave temperature imaging: numerical simulations
Rius Casals, Juan Manuel; Pichot du Mezeray, Christian Yves Dominique; Jofre Roca, Lluís; Bolomey, Jean Charles; Joachimowicz, N; Broquetas Ibars, Antoni; Ferrando Bataller, Miquel (1992-12)
Article
Accés obertA comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ... -
Planar and cylindrical active microwave temperature imaging: numerical simulations
Rius Casals, Juan Manuel; Pichot du Mezeray, Christian Yves Dominique; Jofre Roca, Lluís; Bolomey, J. C. (Jean-Charles); Joachimowicz, N.; Broquetas Ibars, Antoni; Ferrando Bataller, Miguel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-12-02)
Article
Accés obertA comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ... -
Planar array diagnostic from cylindrical near-field measurements
Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1990)
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Accés obert -
Polarization reconfigurable MEMS-CPW antenna for mm-wave applications
Balcells Ventura, Jordi; Damgaci, T.; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (2010)
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Accés obertThis letter presents a polarization reconfigurable MEMS-integrated coplanar patch antenna for mm-wave applications. The polarization of the field radiated by this reconfigurable antenna can be configured into right-handed ... -
Projecte CLEAR: Collaborative Learning on ECTS Array Resolution
Anton, Mireia; Romeu Robert, Jordi; Jofre Roca, Lluís; Blanch Boris, Sebastián; Gonzalez, J.M.; Cardama Aznar, Ángel; Rius Casals, Juan Manuel (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2005-02)
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Accés obertEl Projecte CLEAR s’emmarca en el procés de desenvolupament del mòdul d’aprenentatge interactiu “Array Antennas” en el context de l’assignatura d’Antenes de l’Escola Tècnica Superior Enginyeria de Telecomunicació ... -
Radioenlace digital a 11 GHz para telemando y telecontrol
Artal, E.; Cardama Aznar, Ángel; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Elias Fusté, Antoni; Ferrando, Miguel; Jofre Roca, Lluís; de los Reyes, Elías (Institute of Electrical and Electronics Engineers (IEEE), 1984)
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Accés obertA digital radio-relay link in the band 10.7- 11.7 GHz developed for the remote control system of ENHER is presented. The objectives were the construction of a reliable and yet low-cost transmitter-receiver. To accomplish ... -
Radiometric and spatial resolution constraints in millimeter-mave close-range passive screener systems
Nova, Enrique; Romeu Robert, Jordi; Torres Torres, Francisco; Pablos Hernández, Miriam; Riera, Jose Manuel; Broquetas Ibars, Antoni; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2013-04)
Article
Accés restringit per política de l'editorialThis paper presents a comparative study of the radiometric sensitivity and spatial resolution of three near-field (NF) passive screener systems: real aperture, 1-D synthetic aperture (SA), and 2-D SA radiometers are compared. ... -
Rapid near-field antenna testing via arrays of modulated scattering probes
Bolomey, Jean Charles; Cown, Barry J.; Jofre Roca, Lluís (1988-08-06)
Article
Accés obertKey results are summarized of efforts to significantly reduce the near-field measurement time by utilizing one- or two-dimensional arrays of modulated scattering probes in lieu of the single probe ordinarily used in ... -
Real time 100 GHz MST imaging retina
Alonso del Pino, María; Garg, V.; García Guerra, Carlos Enrique; Romeu Robert, Jordi; Llombart, Nuria; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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Accés restringit per política de l'editorialA real time tomographic imaging system at 100 GHz based on a retina and Modulated Scattered Technique (MST) is presented in this paper. It consists in applying a low frequency modulation to each probe of an array of antennas ... -
Receptor coherente para imágenes por microondas
de los Reyes, Elías; Jofre Roca, Lluís; Ferrando Bataller, Miquel (1984)
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Accés obertIn order to avoid heating in the microwave imaging of biological bodies a very high sensitivity is needed for the receiver. We present a low cost sensitive coherent microwave receiver in microstrip technology. -
Receptor para TV difundida directamente desde satélites
Artal, E.; Cardama Aznar, Ángel; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Elias Fusté, Antoni; Ferrando, M.; Jofre Roca, Lluís; de los Reyes, Elías (Institute of Electrical and Electronics Engineers (IEEE), 1984)
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Accés obertThe direct broadcast satellite receiver in the 12 GHz band developed in the Electrophysics Department in cooperation with the R & D Departments of Mier Allende, S.A. and Tagra, S.A. is described. It features a low-noise ... -
Reconfigurable dual-polarized beam-steering broadband antenna using a crossed-strips geometry
Ramírez Arroyave, Germán Augusto; Zhou, Ivan; Blanch Boris, Sebastián; Towfiq, Asaduzzaman; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2021-08)
Article
Accés obertIn this letter, a reconfigurable dual-polarized broadband antenna with beam-steering capabilities using a parasitic layer is proposed for 5G new radio (NR) frequency range 1 (FR-1) applications. The antenna is a dual-port ... -
Reconfigurable pixel-layer isolator for frequency-tunable on-frequency repeaters
Rodrigo López, Daniel; Díaz Tapia, Edgar; Jofre Roca, Lluís (2014)
Article
Accés restringit per política de l'editorialThe maximum gain in on-frequency repeaters is limited by the isolation level between their two antennas due to close-loop stability conditions. In this letter, a novel pixel-layer isolator for tunable on-frequency repeaters ... -
Reconstrucción de la reflectividad de blancos radar
Broquetas Ibars, Antoni; Rius Casals, Juan Manuel; Fabregas Canovas, Francisco Javier; Galmes, S; Jofre Roca, Lluís (Unión Científica Internacional de Radio (URSI), 1989)
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Accés obertProcessing radar cross section data is possible to image sorne properties of a target. The paper presents two radar imaging algorithms allowing the reconstruction of reflectivi ty distribution of the target or i ts ...