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Ara es mostren els items 54-63 de 63

    • 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 obert
      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 ...

    • RFID based probes for EM-field measurements 

      Capdevila Cascante, Santiago; Massud, Muhammad; Serrano, Raquel; Aguasca Solé, Alberto; Blanch Boris, Sebastián; Romeu Robert, Jordi; Bolomey, J.Ch; Jofre Roca, Lluís (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
      Text en actes de congrés
      Accés obert
      In this paper the use of RFID for EM field measurement is studied. A novel RFID antenna with high tuning capabilities is presented and measured, and it is used in combination with several RFID IC to measure the EM ...

    • Self-similar prefractal frequency selective surfaces for multiband and dual-polarized applications 

      Gianvittorio, John P.; Romeu Robert, Jordi; Blanch Boris, Sebastián; Rahmat-Samii, Yahya (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-01-31)
      Article
      Accés obert
      Frequency-selective surfaces (FSS) that have been designed using the iterative techniques of fractals have been fabricated and measured. Fractals contain many scales of the starting geometry, each of which acts as a ...

    • Sensitivity study of the microwave spiralimetric imaging 

      Jofre Roca, Lluís; Blanch Boris, Sebastián; Cardama Aznar, Ángel; Rius Casals, Juan Manuel; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2005)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The use of the spiral modes-electromagnetically related to the orbital momentum of the photons- at microwave frequencies for imaging purposes is studied and some preliminary numerical and experimental results for basic ...

    • Sistema de adquisición y procesado de datos en campo próximo esférico 

      González Arbesú, José María; Blanch Boris, Sebastián (1991)
      Text en actes de congrés
      Accés obert
      Near field antenna measurements supply e qua! or more accurate results than far field measurements, its main dijficulty is the post processing of the data measured in the anechoic chamber. In this paper we show a measurement ...

    • Small UAV radiocommunication channel characterization 

      Romeu Robert, Jordi; Aguasca Solé, Alberto; Alonso Valdesueiro, Javier; Blanch Boris, Sebastián; Martins, Ricardo (2010)
      Text en actes de congrés
      Accés obert
      Small Unmanned Aerial Vehicles (UAV) are finding different applications as platforms to carry observation payloads. The need to establish reliable high data rate channels requires to characterize the radiocommunication ...

    • Study of interconnecting switch currents in reconfigurable parasitic layer antennas 

      Ramirez, German; Araque, Javier; Ballesteros Sánchez, Christian; Blanch Boris, Sebastián; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This work presents an approach for calculating the currents across the switches of a reconfigurable parasitic layer intended to add beam-steering capabilities to a reference antenna. The method of analysis is based on the ...

    • Three-Dimensional beamsteering low complexity reconfigurable multilevel antenna 

      Zhou, Ivan; Ramírez Arroyave, Germán Augusto; Montero Bayo, Luca; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2020-04)
      Article
      Accés obert
      A low-complexity reconfigurable antenna (RA) capable of steering its beam into nine different directions corresponding to ¿={-42°,0°,42°} in the ¿={25°,0°,155°} planes, and ¿=±25° in the ¿=90° plane, using a reduced number ...

    • Toward 3D UWB tomographie imaging system for breast tumor detection 

      Guardiola Garcia, Marta; Jofre Roca, Lluís; Capdevila Cascante, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi (2010)
      Text en actes de congrés
      Accés obert
      A novel 3D tomographic algorithm for short range cylindrical geometries using UWB frequency range is presented. The algorithm has been applied to breast tumor detection, nevertheless, its non application-specific character ...

    • UWB High-contrast robust tomographic imaging for medical applications 

      Guardiola Garcia, Marta; Capdevila Cascante, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2009)
      Text en actes de congrés
      Accés obert
      In this paper a complete UWB Circular Tomographic System robust to high contrast or large objects, applied to Breast Tumor Detection, is presented. The main contribution of this paper is to focus on the implementation ...