Now showing items 1-12 of 140

  • Benefits of applying nodal sampling to SMOS data over semi-enclosed seas and strongly RFI-contaminated regions 

    González Gambau, Verónica; Olmedo, Estrella; Martinez, J.; Turiel, Antonio; Corbella Sanahuja, Ignasi; Oliva, Roger; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
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    Radio Frequency Interferences (RFI) are still an important source of contamination in SMOS data. The application of nodal sampling (NS) to brightness temperature images helps to mitigate the degradation that RFIs produce ...
  • Small footprint evaluation of metal coatings for additive manufacturing 

    Krkotic, Patrick; Aguasca Solé, Alberto; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
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    Rutile resonators have been used in the past to characterize high-temperature superconductors. In this work we describe a novel use of this type of resonator: the characterization of surface resistance in metal coatings ...
  • New methodology for the Faraday rotation angle retrieval in the SMOS field of view 

    Rubino, Roselena; Duffo Ubeda, Núria; González Gambau, Verónica; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference lecture
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    In this work, a new methodology to estimate the Faraday Rotation Angle (FRA) from SMOS full-pol brightness temperature is presented. This approach is focused on retrieving the Vertical Total Electron Content (VTEC) and ...
  • SMOS instrument performance after more than 8 years in orbit and lessons learnt for future L-band missions 

    Martín Neira, Manuel; Oliva Balagué, Roger; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Durán Martínez, Israel; Kainulainen, Juha; Closa Soteras, Josep; Zurita Campos, Alberto Manuel; Cabot, François; Khazaal, Ali; Anterrieu, E.; Barbosa, José; Tenerelli, Joseph; Díez, Raúl; Turiel, Antonio; González Gambau, Verónica (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
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  • A submillimeter wave parabolic reflector by additive manufacturing 

    Romeu Robert, Jordi; Aguasca Solé, Alberto; Blanch Boris, Sebastián; O'Callaghan Castellà, Juan Manuel; Jofre Roca, Lluís; Buitrago Ventura, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
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    The manufacturing of prototype of an offset parabolic reflector to operate at 120 GHz is presented. The paper describes the different metallization options to achieve a good performance.
  • Dispositivos coaxiales micromecanizados para banda milimétrica 

    Jaimes Vera, Edith Aline; Llamas Garro, Ignacio; Maolong, Ke; Wang, Yi; Lancaster, Michael J.; Pradell i Cara, Lluís (2010)
    Conference report
    Open Access
    This paper presents compact micromachined coaxial devices for millimeter wave applications at U and V bands. The coaxial center conductor is suspende d in air by short circuits to the outer conductor. The designs include ...
  • Impact of antenna tuning on SMOS correlation loss 

    Torres Torres, Francisco; Durán Martínez, Israel; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Closa, Josep; Oliva, Roger; Martín-Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
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    The Soil Moisture and Ocean Salinity (SMOS) mission by the European Space Agency (ESA) was launched in 2009 [1]. Since then, it has produced a continuous stream of valuable geophysical data over land, ice and ocean [2] ...
  • Comprehensive circuit model of auto-limiting superconductor devices and systems 

    Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Hueltes Escobar, Alberto; O'Callaghan Castellà, Juan Manuel; García Pastor, David; Perea Robles, Rafael; Joshi, N.; Lu, X.; Orloff, Nathan D.; Booth, James C. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference lecture
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    This paper presents a phenomenological equivalent circuit to model the phenomenon occurring when a section of superconducting transmission line transits from a superconducting state to a normal state. This phenomenon allows ...
  • Sistema de medida de paráemtros de ruido con generación automática de configuraciones de impedancia de fuente 

    Pradell i Cara, Lluís; Fauna, G; O'Callaghan Castellà, Juan Manuel; Lázaro Guillén, Antoni (1996)
    Conference report
    Open Access
  • Modelos físicos y técnicas de medida de ruido de transistores MESFETS y HEMT a frecuencias de microondas 

    Pradell i Cara, Lluís; Purroy, Francesc; O'Callaghan Castellà, Juan Manuel (1996)
    Conference report
    Open Access
  • Lugares geométricos de mal condicionamiento y constelaciones de admitancias de fuentes utilizadas en la extracción de parámetros de ruido 

    O'Callaghan Castellà, Juan Manuel; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi (1996)
    Conference report
    Open Access
  • Reconfigurable multimodal bandpass filter based on RF-MEMS switchable CPW air-bridges 

    Contreras Bleda, Adrián; Casals Terré, Jasmina; Pradell i Cara, Lluís; Giacomozzi, Flavio; Iannacci, Jacopo; Ribó i Pal, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
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    In this paper, a uniplanar RF-MEMS secondorder bandpass filter with reconfigurable centre frequency is presented. It is based on quarter-wavelength slotline resonators and CPW-slotline multimodal immittance inverters (MIIs), ...