• Microwave reflection tomographic array for damage detection of civil structures 

      Kim, Yoo Jin; Jofre Roca, Lluís; Flaviis, Franco de; Feng, Maria Q. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-11-30)
      Article
      Accés obert
      Microwave tomographic imaging technology using a bifocusing operator has been developed in order to detect the internal voids/objects inside concrete structures. The imaging system consists of several cylindrical or ...
    • Miniature multi-element antenna for wireless communications 

      Jofre Roca, Lluís; Cetiner, Bedri Artug; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-05-31)
      Article
      Accés obert
      We present a novel broad-band miniature antenna and employ it in a multi-element geometry with diversity capabilities for wireless communications. This antenna (diameter < 0.2 λ and thickness < 0.06 λ) consists of two ...
    • Novel design methodology of matching networks based on the use of simmetry operators 

      Grau, Alfred; Romeu Robert, Jordi; Jofre Roca, Lluís; Flaviis, Franco de (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06)
      Text en actes de congrés
      Accés obert
    • 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)
      Article
      Accés obert
      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 ...
    • Small-size broadband multi-element antenna for RF/wireless systems 

      Cetiner, Bedri Artug; Jofre Roca, Lluís; Qian, J. Y.; Flaviis, Franco de (IEEE, 2003-10-31)
      Article
      Accés obert
      We present a small-size broadband antenna specifically designed for integration with RF/wireless communication systems. The antenna is built on a printed circuit board and fed by a coplanar waveguide (CPW) to allow further ...