Recent Submissions

  • Scattering and emissivity of rain events using boundary element method 

    Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bara Temes, Francisco Javier; Torres Torres, Francisco (2000)
    Conference report
    Open Access
    The theory of thermal microwave emission from a bounded medium containing random nonspherical discrete scatters is studied. It is known that for a medium of constant temperature the emissivities can be related to the ...
  • Modelo de transistores MESFET en régimen no lineal 

    Corbella Sanahuja, Ignasi; Legido, Jm; Pradell i Cara, Lluís (1989)
    Conference report
    Open Access
  • Method of moments applied to the analysis of rough surfaces modelled by fractals 

    Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bara Temes, Francisco Javier; Torres Torres, Francisco (2000)
    Conference report
    Open Access
    The Scattering and Emissivity of rough surfaces involve solutions to non-linear differential equations. Different approaches have been used in the literature to obtain approximate solutions under some hypothesis. For example ...
  • Evaluation of MIRAS space borne instrument performance: snap shot radiometric accuracy and its improvement by means of pixel averaging 

    Camps Carmona, Adriano José; Torres Torres, Francisco; Bara Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Martín Neira, Manuel (1997)
    Conference report
    Open Access
  • Calibration procedures in 2-D large interferometric radiometers study applied to the MIRAS/SMOS instrument 

    Torres Torres, Francisco; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Bará Temes, Francisco Javier; Vall-Llossera Ferran, Mercedes Magdalena; Duffo Ubeda, Núria (2000)
    Conference report
    Open Access
  • New radiometers: SMOS-a dual pol L-band 2D aperture synthesis radiometer 

    Kerr, Yann H.; Waldteufel, Philippe; Camps Carmona, Adriano José; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena (Institute of Electrical and Electronics Engineers (IEEE), 2000)
    Conference report
    Open Access
    Since the mid 1980s, aperture synthesis interferometric radiometers have received increased attention to monitor the Earth at low microwave frequencies (L-band), where there is a maximum sensitivity to soil moisture and ...
  • Banco automatizado para la medida de parámetros S, de ruido y características DC de transistores en oblea 

    Pradell i Cara, Lluís; Purroy, Francesc; Subirats, M.; Ballester, A.; Torres Torres, Francisco; O'Callaghan Castellà, Juan Manuel; Corbella Sanahuja, Ignasi (1994)
    Conference report
    Open Access
    The AMR Group has an automatized bench for the measurement of DC-characteristics, [S] parameters (45 MHz- 40 GHz) and noise parameters (2-26.5 GHz) of microwave on-wafer transistors. The hardware configuration is described, ...
  • Modelado físico de transistores MESFET y HEMT 

    Lázaro, A; Pradell i Cara, Lluís; Torres Torres, Francisco (1994)
    Conference report
    Open Access
    Models are developed for the de I-V curves and microwave small-signal parameters of the GaAs MESFET and HEMT. In the first step, the concept of a local small-signal equivalent circuit is introduced. In the second step, a ...
  • Mezclador autooscilante con FET de AsGa en banda X. Consideraciones de diseño 

    Corbella Sanahuja, Ignasi; de los Reyes, Elías; Elias Fusté, Antonio (1998)
    Conference report
    Open Access
    Using a single active device as a non linear element both oscillating and mixing functions are acomplished. A method of design that uses a dielectric resonator as a frequency selective network is given.
  • A large signal nonlinear MODFET model from small signal S-parameters 

    O'Callaghan Castellà, Juan Manuel; Beyer, Jb (1989)
    Conference report
    Open Access
    A general technique for predicting the MODFET large signal performance has been developed. The technique is based entirely on experimental data (small signal S-parameters at different biased points) and therefore is ...

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