Ara es mostren els items 180-199 de 254

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      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 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 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)
      Text en actes de congrés
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    • Polarization reconfigurable MEMS-CPW antenna for mm-wave applications 

      Balcells Ventura, Jordi; Damgaci, T.; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (2010)
      Text en actes de congrés
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      This 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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      El 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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      A 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'editorial
      This 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 obert
      Key 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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      A 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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      In 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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      The 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
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      In 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'editorial
      The 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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      Processing 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 ...