Ara es mostren els items 1-20 de 177

  • 20/30 GHz front-end for the TMS-7 receiving station of the OLYMPUS satellite 

    Artal, E; Bará, J; Berenguer Sau, Jordi; Comerón Tejero, Adolfo; Corbella Sanahuja, Ignasi; Pradell i Cara, Lluís (1989)
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    The authors present the 20/30-GHz front-end of the TMS-7 station for performing the measurement of the flux density of one or more signal carriers received from the OLYMPUS satellite. The front-end is composed of two ...
  • A calibration method for fully polarimetric microwave radiometers 

    Lahtinen, J..; Gasiewski, A.J.; Klein, M.; Corbella Sanahuja, Ignasi (IEEE Press. Institute of Electrical and Electronics Engineers, 2003-03)
    Article
    Accés obert
    A technique for absolute end-to-end calibration of a fully polarimetric microwave radiometer is presented. The technique is based on the tripolarimetric calibration technique of Gasiewski and Kunkee, but is extended to ...
  • A microstrip low cost, high performance, intruder radar detector 

    de los Reyes, Elías; Elias Fusté, Antonio; Ferrando, Miguel; Corbella Sanahuja, Ignasi (Institute of Electrical and Electronics Engineers (IEEE), 1986)
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    Doppler Radars operatinq as conventional intruder detectors at X band have been used in several security applications. However, almost all of them utilize heavy and bulky microwave subsystems in wavequide technoloqy. This ...
  • A new calibration technique for interferometric radiometers 

    Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Bará Temes, Francisco Javier (1998)
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    This paper presents a new method for receiver calibration of interferometric radiometers. It is based on the distributed noise injection mechanism and it consists of fully calibrating the baseline error terms of the central ...
  • A new space technology for ocean observation: the SMOS mission 

    Font Ferré, Jordi; Ballabrera Poy, Joaquim; Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Durán Martínez, Israel; Emelianov Kolomitski, Mikhail; Enrique González, Luis; Fernández Gallego, Pedro; Gabarró Prats, Carolina; González, Cristina; González, Veronica; Gourrion, J.; Guimbard, S.; Hoareau, N.; Julià, A; Kalaroni, S.; Konstantinidou, Anna; Aretxabaleta, L.; Martínez, Justino; Miranda, Jorge Miguel; Monerris Belda, Alessandra; Montero, Sergio; Mourre, B.; Pablos Hernández, Miriam; Pérez Villar, Fernando; Piles Guillem, Maria; Portabella, M.; Sabia, R.; Salvador, Joaquin; Talone, Marco; Torres Torres, Francisco; Turiel Martínez, Antonio; Vall-Llossera Ferran, Mercedes Magdalena; Villarino Villarino, Ramón (2012)
    Article
    Accés restringit per política de l'editorial
    Capability for sea surface salinity observation was an important gap in ocean remote sensing in the last few decades of the 20th century. New technological developments during the 1990s at the European Space Agency led to ...
  • A novel reconstruction algorithm for the improvement of SMOS brightness temperatures 

    González Gambau, Veronica; Turiel, Antonio; Martinez, Justino; Olmedo, Edson; Corbella Sanahuja, Ignasi (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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    Accés restringit per política de l'editorial
    RFI (Radio Frequency Interference) sources, Sun signal and even land-sea transitions may generate large sidelobes that corrupt SMOS brightness temperature products and therefore, the quality of the soil moisture and sea ...
  • Advanced millimeter wave technology for mobile communications 

    Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi; Comerón Tejero, Adolfo; Bará Temes, Francisco Javier; Artal, E.; Torres Torres, Francisco; Purroy, Francesc; Barlabe Dalmau, Antoni; Sales, V. (Institute of Electrical and Electronics Engineers (IEEE), 1993)
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  • Advances in calibration of the SMOS zero-baseline radiometers 

    Colliander, Andreas; Chae, Chunsik; Dinnat, Emmanuel Philippe; Oliva, Roger; Kainulainen, Juha; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Over the course of the more than four-year mission several enhancements have been developed for the calibration of the zero-baseline radiometers of ESA's SMOS (Soil Moisture Ocean Salinity) mission. Here a particular ...
  • Amplificador de potencia en banda ka 

    Corbella Sanahuja, Ignasi; Fortuny Guasch, Joaquim (1990)
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  • Amplificadores multietapa de bajo en las bandas de 20 y 30ghz 

    Artal, E; Corbella Sanahuja, Ignasi; Busquets, C; Pradell i Cara, Lluís (1989)
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    Microstrip coupled lines technology has been used to design and built low noise amplifiers in 20 and 30 GHz bands. Active devices are GaAs MESFET and HEMT in chip form. The amplifiers have input and output waveguide ...
  • Analisis y diseño de un oscilador en banda V 

    Corbella Sanahuja, Ignasi; Salazar Soler, Jorge (1991)
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    In this paper the analysis and design of an oscillator in V band is presented. Taking advantage of a coaxial oscillation, sorne results related with frequency stability have been obtained. A special attention has been paid ...
  • Analisys of noise injection networks for interferometric radiometer calibration 

    Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE Microwave Theory and Techniques Society, 2000-04)
    Article
    Accés obert
    Abstract: The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture ...
  • Analisys of noise-injection networks for interferometric-radiometer calibration 

    Corbella Sanahuja, Ignasi; Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04-30)
    Article
    Accés obert
    The spatial resolution of current space-borne Earth observation radiometers is limited by the physical antenna aperture. This is especially critical at L-band, which exhibits high sensitivity to soil moisture and sea surface ...
  • Analysis of correlation and total power radiometer front-ends using noise waves 

    Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
    Article
    Accés obert
    A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...
  • Analysis of Correlation and Total Power Radiometer Front-Ends Using Noise Waves 

    Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Camps Carmona, Adriano José; Duffo Ubeda, Núria; Vall-Llossera Ferran, Mercedes Magdalena; Rautiainen, Kimmo; Martín Neira, Manuel; Colliander, Andreas (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-11-30)
    Article
    Accés obert
    A complete and systematic noise analysis of radiometer front-ends, including both total power and correlation measurements, is presented. The procedure uses the concepts of noise waves and S-parameters, widely used in ...
  • Análisis y diseño de osciladores en cavidad resonante en bandas K y V 

    Corbella Sanahuja, Ignasi (Universidad de Málaga, 1992)
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  • Análisis y diseño de un oscilador en banda V 

    Salazar Soler, Jorge; Corbella Sanahuja, Ignasi (1991)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper the analysis and design of an oscillator in V ban is presented. Taking advantage of a coaxial oscillation, some results related with frequency stability have been obtained. A special attention has been paid ...
  • Angular resolution of two-dimensional, hexagonally sampled interferometric radiometers 

    Bará Temes, Francisco Javier; Camps Carmona, Adriano José; Torres Torres, Francisco; Corbella Sanahuja, Ignasi (1998-09)
    Article
    Accés restringit per política de l'editorial
    A theoretical analysis of the angular resolution of two-dimensional interferometric radiometers for Earth observation from low-orbit satellites and its degradation due to spatial decorrelation effects is presented. The ...
  • Automatic calibration of channels frequency response in interferometric radiometers 

    Camps Carmona, Adriano José; Torres Torres, Francisco; Bará Temes, Francisco Javier; Corbella Sanahuja, Ignasi; Monzón Soria, Francisco Jose (IEE-INST ELEC ENG, 1999-01-31)
    Article
    Accés obert
    The large field of view required in Earth observation interferometric radiometers does not enable the use of a variable delay to compensate for different transit times, as in radioastronomy. A technique is presented to ...
  • 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)
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    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, ...