Ara es mostren els items 169-188 de 254

    • Obtención de imágenes de la superficie terrestre y marina mediante radiometría de microondas 

      Broquetas Ibars, Antoni; Jofre Roca, Lluís (1991)
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    • Obtención de imágenes ISAR de blancos móviles 

      Puente Baliarda, Carles; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1992)
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      A new method for motion compensation has been developed for radar imaging of moving targets (ISAR). Phase shifts (due to target motion) among adjacent pulses from a STEPPED FREQUENCY signal, are removed with a parabolic ...
    • On differential imaging using electromagnetic simulation for vehicular antenna signature analysis 

      Solano Pérez, José Antonio; Martinez Ingles, Maria Teresa; Molina García-Pardo, José María; Romeu Robert, Jordi; Jofre Roca, Lluís; Ballesteros Sánchez, Christian; Rodríguez Rodríguez, José Víctor; Mateo Aroca, Antonio; Guzmán Quirós, Raúl (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-30)
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      The current trend in vehicles is to integrate a wide number of antennae and sensors operating at a variety of frequencies for sensing and communications. The integration of these antennae and sensors in the vehicle platform ...
    • On the possible use of microwave-active imaging for remote thermal sensing 

      Bolomey, Jean Charles; Jofre Roca, Lluís; Peronnet, Guy (IEEE Microwave Theory and Techniques Society, 1983-09)
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    • On the wireless microwave sensing of bacterial membrane potential in microfluidic-actuated platforms 

      Jofre Cruanyes, Marc; Jofre Cruanyes, Lluís; Jofre Roca, Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05-14)
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      The investigation of the electromagnetic properties of biological particles in microfluidic platforms may enable microwave wireless monitoring and interaction with the functional activity of microorganisms. Of high relevance ...
    • Optical cross-correlation of millimeter wave signals applied to interferometric radiometry 

      Nova, Enrique; Romeu Robert, Jordi; Torres Torres, Francisco; Broquetas Ibars, Antoni; Jofre Roca, Lluís (IEEE, 2011)
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      This paper presents a method to perform in the opti- cal domain the correlations required when processing millimeter wave interferometric radiometer signals. The main problem when addressing the design of an interferometric ...
    • Optical signal processor for millimeter-wave interferometric radiometry 

      Nova Lavado, Enrique; Romeu Robert, Jordi; Capdevila Cascante, Santiago; Torres Torres, Francisco; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2014-05)
      Article
      Accés restringit per política de l'editorial
      In interferometric radiometry, the correlations between all pairs of radio-frequency (RF) receivers must be performed in order to obtain the scene visibilities. This represents a cumbersome problem in passive imaging where ...
    • Optically beamformed wideband array performance 

      Jofre Roca, Lluís; Stoltidou, Chysavgi; Blanch Boris, Sebastián; Mengual, Teresa; Vidal, Borja; Marti, Javier; Mckenzie, Iain; Cura, J.M. del (2008-06)
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      Optical beamforming networks (OBFNs) are an interesting alternative for the design of wideband antenna arrays, mainly due to their low losses and weight, their high parallel processing capabilities and their electromagnetic ...
    • Optimización de RCS de blancos radar mediante procesado gráfico 

      Rius Casals, Juan Manuel; Jofre Roca, Lluís; Vall-Llossera Ferran, Mercedes Magdalena (Universidad de Málaga, 1992)
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    • Optimization of linear multielement antennas for selection combining by means of a Butler matrix in different MIMO environments 

      Grau Besolí, Alfred; Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-11-30)
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      An optimized linear multielement antenna (MEA) is presented for selection combining schemes that improves the selection diversity gain and selection diversity capacity in medium and low multipath environments, with ...
    • Optimum design of a scavenging antenna system 

      Serrano, Raquel; Aguasca Solé, Alberto; Romeu Robert, Jordi; Jofre Roca, Lluís (2010)
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      This paper presents some guidelines for the design procedure of an optimum scavenging antenna system. Based on these guidelines, a scavenging antenna has been fabricated and characterized, achieving very good results ...
    • 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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      A 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'editorial
      A 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)
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      The 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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      We 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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      The 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)
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      A 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)
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      Accés obert
      A 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 obert
      A 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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