Enviaments recents

  • Compact fully uniplanar bandstop filter based on slow-wave multimodal CPW resonators 

    Contreras Bleda, Adrián; Ribó i Pal, Miquel; Pradell i Cara, Lluís; Raynal, Víctor; Moreno, Ignacio; Combes, Maxence; Ten, Milena (2018-07-26)
    Article
    Accés obert
    In this letter, a compact, fully uniplanar bandstop filter is presented. It is based on multimodal coplanar waveguide resonators implemented using a slow-wave periodic structure that greatly reduces the filter’s horizontal ...
  • Bandgap widening in macroporous silicon photonic crystals by multiperiodic structures 

    Segura García, Daniel; Cardador Maza, David; Vega d'Aurelio, Davide; Santos Blanco, M. Concepción; Dios Otín, Víctor Federico; Rodríguez Martínez, Ángel (Institute of Physics (IOP), 2018-05-14)
    Article
    Accés obert
    Large bandgaps with low transmission in 3D macroporous silicon photonic crystals have been proved as an interesting technology for the development of optical filters and spectroscopic MIR gas sensors. The aim of this study ...
  • Dielectric properties of colon polyps, cancer, and normal mucosa: Ex vivo measurements from 0.5 to 20 GHz 

    Guardiola, Marta; Buitrago Ventura, Santiago; Fernández-Esparrach, Glòria; O'Callaghan Castellà, Juan Manuel; Romeu Robert, Jordi; Cuatrecasas, Miriam; Córdoba, Henry; González Ballester, Miguel A.; Camara, Oscar (2018-06-15)
    Article
    Accés restringit per política de l'editorial
    Colorectal cancer is highly preventable by detecting and removing polyps, which are the precursors. 20 Currently, the most accurate test is colonoscopy, but still misses 22% of polyps due to visualization limitations. In ...
  • 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 ...

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