Enviaments recents

  • Integral equation mei applied to three-dimensional arbitrary surfaces 

    Rius Casals, Juan Manuel; Parrón Granados, Josep; Úbeda Farré, Eduard; Mosig, J R (Institution of Electrical Engineers, 1997-11)
    Article
    Accés obert
    The authors present a new formulation of the integral equation of the measured equation of invariance (MEI) as a confined field integral equation discretised by the method of moments, in which the use of numerically derived ...
  • Analysis of electrically large concave scatterers with the integral equation mei 

    Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Michalski, Krzysztof (1997-04)
    Article
    Accés restringit per política de l'editorial
    The integral equation MEI (IE-MEI) is a new, sparse matrix formulation of the boundary-element method, which is particularly well suited for large convex scatterers. In this Letter we explain why the original implementation ...
  • Impact of antenna errors on the radiometric accuracy of large aperture synthesis radiometers 

    Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Romeu Robert, Jordi (1997-04)
    Article
    Accés restringit per política de l'editorial
    A classification of system errors in aperture synthesis radiometry applied to Earth observation is presented. A general procedure to quantify the impact of antenna errors on the radiometric accuracy is developed and is ...
  • Fractal multiband antenna based on the sierpinski gasket 

    Puente Baliarda, Carles; Romeu Robert, Jordi; Pous Andrés, Rafael; García, X; Benítez, F (Institution of Electrical Engineers, 1996-01)
    Article
    Accés obert
    Experimental and computed results show a multiband behaviour over five bands for the new fractal Sierpinski antenna. Such a behaviour is based on the self-similarity properties of the antenna's fractal shape, which might ...
  • Perturbation of the sierpinski antenna to allocate the operating bands 

    Puente Baliarda, Carles; Romeu Robert, Jordi; Bartolomé, R; Pous Andrés, Rafael (Institution of Electrical Engineers, 1996-11)
    Article
    Accés obert
    A scheme for modifying the spacing between the bands of the Sierpinski antenna is introduced. Experimental results of two novel designs of fractal antennas suggest that the fractal structure can be perturbed to enable the ...
  • Multiband properties of a fractal tree antenna generated by electrochemical deposition 

    Puente Baliarda, Carles; Claret Bonet, Josep; Romeu Robert, Jordi; López-Salvans, M Q; Pous Andrés, Rafael (Institution of Electrical Engineers, 1996-12)
    Article
    Accés obert
    Experimental results on a fractal tree-like antenna are reported. The fractal structure is generated by electrochemical deposition. The antenna presents a multiband behaviour with a denser band distribution than the ...
  • Integral formulation of the measured equation of invariance 

    Rius Casals, Juan Manuel (Institution of Electrical Engineers, 1996-01)
    Article
    Accés obert
    A novel integral formulation of the measured equation of invariance is derived from the reciprocity theorem. This formulation leads to a sparse matrix equation for the induced surface current, resulting in great CPU time ...
  • The theoretical error in the integral equation mei 

    Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Mosig, J R (Institution of Electrical Engineers, 1996-11)
    Article
    Accés obert
    The theoretical, or non-numerical error in the integral equation MEI (IE-MEI) is analysed and compared to the numerical error in the method of moments (MoM). It is found that, although this error does not decrease with the ...
  • Frequency extrapolation in the integral equation mei 

    Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Mosig, J R (Institution of Electrical Engineers, 1996-12)
    Article
    Accés obert
    An algorithm to extrapolate in frequency the matrix coefficients of the IE-MEI method is presented. This results in a total operation count to compute the induced current in electromagnetic scattering problems proportional ...
  • Sensores de fibra óptica 

    Torner Sabata, Lluís; Jofre Roca, Lluís (1994-07)
    Article
    Accés restringit per política de l'editorial
    En esta comunicación se revisa brevemente el estado actual de la tecnología de los sensores de fibra óptica. Se introducen sus aplicaciones y tendencias futuras.

Mostra'n més