Enviaments recents

  • Multiple reflections and improvement of edge scattering in GRECO RCS prediction code 

    Rius Casals, Juan Manuel; Vall-Llossera Ferran, Mercedes Magdalena; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1993)
    Text en actes de congrés
    Accés obert
    GRECO code for monostatic RCS prediction in real time has been extended by considering multiple reflections between surfaces and improving the edge diffraction coefficients. Multiple reflections are analysed through a very ...
  • Parche Sierpinksi Perturbado 

    Borja Borau, Carmen; Romeu Robert, Jordi (2000)
    Text en actes de congrés
    Accés obert
    The multiband behavior of the Sierpinski patch is described in this paper, and a new technique to improve such multiband behavior from the point of view of radiation patterns is also introduced.
  • Miniature Wideband stacked microstrip patch antenna based on the sierpinski fractal geometry 

    Romeu Robert, Jordi; Anguera Pros, Jaume; Puente Baliarda, Carles; Borja Borau, Carmen (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Text en actes de congrés
    Accés obert
    The main interest in the design of a miniature microstrip patch antenna (MPA) is its small size in conjunction with the well-known advantages of a MPA (cost, profile, weight). However there is a big constraint on the ...
  • Multiband Sierpinskl fractal patch antenna 

    Borja Borau, Carmen; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Text en actes de congrés
    Accés obert
    The multiband behavior of the Sierpinski patch antenna is described, and a new technique to improve the multiband behavior from the point of view of the radiation patterns is introduced. The technique suppresses the effects ...
  • Dual-band Sierpinski fractal monopole antenna 

    Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Text en actes de congrés
    Accés obert
    A new top-loaded reduced-sized dual-band (1.9 GHz and 3.5 GHz) monopole antenna for wireless communications is presented. The antenna provides better than -15 dB input return loss and keeps the same radiation pattern over ...
  • High directivity modes in the koch island fractal patch antenna 

    Romeu Robert, Jordi; Borja Borau, Carmen; Blanch Boris, Sebastián (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Text en actes de congrés
    Accés obert
    The article shows that a patch antenna with fractal boundary exhibits, at a frequencies above the fundamental mode, localized modes. These modes can have broadside directive patterns. As an example of this phenomenon ...
  • On the magnetic field integral equation discretized in linear triangles 

    Úbeda Farré, Eduard; Rius Casals, Juan Manuel; Parron, J; Cardama Aznar, Ángel (CIMNE, 2000)
    Text en actes de congrés
    Accés obert
    A formulation of the Method of Moments is presented for analyzing scattering problems involving three dimensional conductors. It is given an insight into the Magnetic Field Integral equation for which a triangle facet is ...
  • Analysis of reflector and horn antennas using multilevel fast multipole algorithm 

    Heldring, Alexander; Rius Casals, Juan Manuel; Parrón Granados, Josep; Cardama Aznar, Ángel; Ligthart, L P (CIMNE, 2000)
    Text en actes de congrés
    Accés obert
    The MultiLevel Fast Multipole Algorithm (MLFMA) has been implemented in a Method of Moments code for arbitrarily shaped metal surfaces discretized in Rao, Wilton and Glisson (RWG) basisfunctions. The accuracy of the ...
  • Infrared thermograms applied to near-field testing 

    González Arbesú, José María; Aguasca Solé, Alberto; Blanch Boris, Sebastián; Romeu Robert, Jordi (European Space Agency, 2000)
    Text en actes de congrés
    Accés obert
    Electromagnetic fields close to radiant structures can be measured quickly using an infrared camera. Examples of induced fields by wire antennas over a detection screen at distances shorter than one wavelength are presented. ...
  • Microwave imaging techniques for biomedical applications 

    Joisel, A; Mallorquí Franquet, Jordi Joan; Broquetas Ibars, Antoni; Geffrin, J M; Joachimowicz, N; Vall·Llossera, M; Vall-Llossera Ferran, Mercedes Magdalena; Jofre Roca, Lluís; Bolomey, Jean Charles (Vincenzo Piuri and Mario Savino, 1999)
    Text en actes de congrés
    Accés obert
    Microwaves have been considered for medical applications involving the detection of organ movements and changes in tissue water content. More particularly cardiopulmonary interrogation via microwaves has resulted in various ...

Mostra'n més