• A contact-less small antenna characterization through impedance modulation 

      Monsalve Carcelen, Beatriz; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
      Text en actes de congrés
      Accés obert
      In smalls antennas S-parameters measurements are highly influenced by the measurement equipment as well as the environment. In order to avoid this inconvenience, a wireless and non-invasive characterization setup is required. ...
    • Analysis and reduction of the distortions induced by time-domain filtering techniques in network analyzers 

      Porrata-Dòria i Yagüe, Ramir de; Broquetas Ibars, Antoni; Martínez, Luís Fernando (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-08-31)
      Article
      Accés obert
      The removal of isolation errors plays an essential role in the calibration process of radar scattering measurements. One of the most common techniques used for that purpose is time-domain filtering, also known as gating. ...
    • Experimental comparison of different scattering mechanism selections for vegetation height retrieval by POLINT 

      López-Sánchez Sánchez, Juan Manuel; Fortuny Guasch, Joaquim; Siebert, Julien; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Text en actes de congrés
      Accés obert
      The application of polarimetric radar interferometry to the estimation of vegetation height is studied. A comparison between different choices for the scattering mechanisms employed in the retrieval algorithm is presented. ...
    • GRECO: graphical electromagnetic computing for RCS prediction in real time 

      Rius Casals, Juan Manuel; Ferrando Bataller, Miguel; Jofre Roca, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-04-01)
      Article
      Accés obert
      An innovative approach to computing the high-frequency radar cross sections (RCSs) of complex radar targets in real time, using a 3-D graphics workstation, is presented. The target (typically, an aircraft) is modeled with ...
    • High frequency radar cross section of complex objects in real time 

      Rius Casals, Juan Manuel; Vall-Llossera Ferran, Mercedes Magdalena (Institute of Electrical and Electronics Engineers (IEEE), 1991)
      Text en actes de congrés
      Accés obert
      It is shown that real-time RCS (radar cross section) computation is possible with a high-performance graphics workstation. Physical optics (PO) and physical theory of diffraction (PTD) approximation are computed using the ...
    • High-frequency RCS of complex radar targets in real time 

      Rius Casals, Juan Manuel; Ferrando Bataller, Miguel; Jofre Roca, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1993-09-01)
      Article
      Accés obert
      This paper presents a new and original approach for computing the high-frequency radar cross section (RCS) of complex radar targets in real time with a 3-D graphics workstation. The aircraft is modeled with I-DEAS solid ...
    • On the testing of the magnetic field integral equation with RWG basis functions in method of moments 

      Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Parrón Granados, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-11-30)
      Article
      Accés obert
      For electromagnetic analysis using method of moments (MoM), three-dimensional (3-D) arbitrary conducting surfaces are often discretized in Rao, Wilton and Glisson basis functions. The MoM Galerkin discretization of the ...
    • Real-time radar cross section of complex targets by physical optics graphical processing 

      Rius Casals, Juan Manuel; Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1990)
      Text en actes de congrés
      Accés obert
    • Spectral iterative algorithm for RCS computation in electrically large or intermediate perfectly conducting cavities 

      Rius Casals, Juan Manuel; Lozano Solsona, Angel; Cardama Aznar, Ángel; Jofre Roca, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-06-01)
      Article
      Accés obert
      A novel algorithm designed to compute efficiently and accurately the high-frequency electromagnetic scattering from open-ended waveguide cavities is presented. The cavity is converted into a stepped-waveguide model so that ...