Enviaments recents

  • Compact, wideband impedance tuner using a three-line-microstrip structure 

    Heredia Vega, Julio César; Ribó Pal, Miquel; Pradell i Cara, Lluís (Institution of Electrical Engineers, 2018-05-03)
    Article
    Accés obert
    A novel three-line-microstrip compact impedance tuner is presented. It is based on a multimodal structure wherein six variable capacitances, implemented with two parallel-connected varactors each, create multiple interactions ...
  • 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)
    Text en actes de congrés
    Accés obert
    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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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] ...
  • Rf interference analysis in aperture synthesis interferometric radiometers: application to l-band miras instrument 

    Camps Carmona, Adriano José; Corbella Sanahuja, Ignasi; Torres, F; Bará, J; Capdevila Vives, Joan (Institute of Electrical and Electronics Engineers (IEEE), 2000-03)
    Article
    Accés obert
    Current spaceborne radiometers do not achieve the required spatial resolution demanded by the scientific community due to antenna-size technological limitations. In recent years, several space agencies have been studying ...
  • Circuit model for mode conversion in coplanar waveguide assymmetric series-impedances 

    Ribó i Pal, Miquel; Cruz Romero, Janill Marie de la; Pradell i Cara, Lluís (Institution of Electrical Engineers, 1999-10)
    Article
    Accés obert
    A new 'circuit model' for converting between even and odd modes in asymmetric series impedances in the ground plane of a coplanar waveguide is presented. The model is based on the separation of modes into two input and two ...
  • 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)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    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 ...
  • Contaminant particle motion in lubricating grease flow: a computational fluid dynamics approach 

    Westerberg, Lars-Göran; Farré Lladós, Josep; Sarkar, Chiranjit; Casals Terré, Jasmina (2018)
    Article
    Accés obert
    In this paper, numerical simulations of particle migration in lubricating grease flow are presented. The rheology of three lithium greases with NLGI (National Lubricating Grease Institute) grades 00, 1 and 2 respectively ...
  • Comprehensive circuit model of autolimiting superconductor devices 

    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. (2017-06-01)
    Article
    Accés obert
    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 ...
  • Dielectric properties of milk during ultra-heat treatment 

    Muñoz, Israel; Gou, Pere; Picouet, Pierre A.; Barlabe Dalmau, Antoni; Felipe, Xavier (Elsevier, 2018-02-01)
    Article
    Accés restringit per política de l'editorial
    Dielectric properties are important for predicting dielectric heating of foodstuffs. The dielectric properties of three types of milk (raw, skimmed and concentrated non-fat) were analyzed at high frequencies between 10 MHz ...
  • 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)
    Text en actes de congrés
    Accés obert
  • 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)
    Text en actes de congrés
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  • 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)
    Text en actes de congrés
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