Ara es mostren els items 1-20 de 47

  • A cylindrical array for fast microwave tomography 

    de los Reyes, Elías; Jofre Roca, Lluís; Broquetas Ibars, Antoni; Elias Fusté, Antonio; Cardama Aznar, Ángel (Unión Científica Internacional de Radio (URSI), 1987)
    Text en actes de congrés
    Accés obert
  • A near field spherical wave inverse synthetic aperture radar technique 

    Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 1992)
    Text en actes de congrés
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    The authors present an imaging near-field spherical wave inverse synthetic aperture radar (SWISAR) algorithm based on a focusing operator of the scattered fields on the target surface. A spherical wave can be easily generated ...
  • Accurate numerical modeling of the TARA reflector system 

    Heldring, Alexander; Rius Casals, Juan Manuel; Ligthart, Leo P.; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-07-31)
    Article
    Accés obert
    The radiation pattern of the large parabolic reflectors of the Transportable Atmospheric RAdar system (TARA), developed at Delft University of Technology, has been accurately simulated. The electric field integral ...
  • Active microwave sensing of highly contrasted dielectric bodies 

    Broquetas Ibars, Antoni; Mallorquí Franquet, Jordi Joan; Rius Casals, Juan Manuel; Jofre Roca, Lluís; Cardama Aznar, Ángel (1993-11)
    Article
    Accés restringit per política de l'editorial
    In this work the active tomographic imaging of biological bodies which exhibits a high dielectric contrast is studied. Two approaches based on the Born approximation are presented: a differential reconstruction method which ...
  • An approximate expression to estimate signal-to-noise improvement in cylindrical near-field measurements 

    Romeu Robert, Jordi; Jofre Roca, Lluís; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-07-01)
    Article
    Accés obert
    A very simple approximate expression for the process gain (PG) for the cylindrical case is derived. The different approximations and assumptions required to obtain this expression are shown. This expression might be useful ...
  • Analysis of electrically large concave scatterers with the integral equation mei 

    Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Michalski, Krzysztof (1997-04)
    Article
    Accés restringit per política de l'editorial
    The integral equation MEI (IE-MEI) is a new, sparse matrix formulation of the boundary-element method, which is particularly well suited for large convex scatterers. In this Letter we explain why the original implementation ...
  • Análisis de antenas de reflector mediante procesado gráfico 

    Vall-Llossera Ferran, Mercedes Magdalena; Salazar, C; Rius Casals, Juan Manuel; Cardama Aznar, Ángel (Universidad de Valladolid, 1995)
    Text en actes de congrés
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    The aim of this article is to show a new technique for calculating the Radiation Pattern of arbitrary geometry reflector antennas. We use the Graphical processing technique developed in this group for Radar Cross Section ...
  • Antenas 

    Cardama Aznar, Ángel; Jofre Roca, Lluís; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Blanch Boris, Sebastián; Ferrando Bataller, Miguel (Edicions UPC, 2002)
    Llibre
    Accés restringit a la comunitat UPC
    En este libro se presentan los métodos fundamentales de análisis de antenas con un nivel de detalle que permite comprender sus principios de funcionamiento y conocer los parámetros de diseño que son de interés práctico. ...
  • Antenas centenarias 

    Cardama Aznar, Ángel (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1994)
    Article
    Accés obert
  • Automatic self-matching network for industrial microwave heating based on the conjugate gradient algorithm 

    Mallorquí Franquet, Jordi Joan; Aguasca Solé, Alberto; Cardama Aznar, Ángel; Pagès Serra, Romà; Haro Sánchez, Jose (IEE-INST ELEC ENG, 1999-02-28)
    Article
    Accés obert
    An automatic matching network has been implemented using a waveguide magic T with two sliding short circuit stubs whch are adjusted by a microcontroller running a conjugate gradient algorithm. The inclusion of this device ...
  • Calculo rcs de bordes arbitrarios y cavidades en aviones complejos 

    Rius Casals, Juan Manuel; Cardama Aznar, Ángel (1991)
    Text en actes de congrés
    Accés obert
    Diffraction by edges and cavities play an importan! role in obtaining the global Radar Cross Section of complex targets.We discuss here how the Modal Serie-Boundary Element Method can be used to provide the far-field ...
  • Creació de recursos en línea per a l’autoaprenentage, foment de l’esperit crític i emprenedor i formació d’un comité d’avaluació externa en el màster MERIT 

    Pradell i Cara, Lluís; Cabrera Beán, Margarita Asuncion; Canal Bienzobas, Fernando; Cardama Aznar, Ángel; Gasull Llampallas, Antoni; González Arbesú, José María; Giró Nieto, Xavier; Heldring, Alexander; Herranz Luis, Jaime; Jofre Roca, Lluís; Mallorquí Franquet, Jordi Joan; Nadeu Camprubí, Climent; Olmos Bonafé, Juan José; Romeu Robert, Jordi; Rius Casals, Juan Manuel; Torres Torres, Francisco; Úbeda Farré, Eduard; Coderch Collell, Marcel; Kerans, Mary Ellen; Ros Giralt, Jordi; García, Antonio; González Font, Blanca; Guardiola Garcia, Marta; Hernández, Antoni; Melgarejo, Natali; Mestres, Albert (2009-02-12T10:25:51Z)
    Comunicació de congrés / Text en actes de congrés
    Accés obert
    El projecte es desenvolupa en el marc de la titulació oficial de màster MERIT del Departament de Teoria del Senyal i Comunicacions. El màster, orientat a la recerca i integrat dins del programa Erasmus Mundus, presenta ...
  • Cylindrical geometry: a further step in active microwave tomography 

    Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel; Elias Fusté, Antonio; Rius Casals, Juan Manuel; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1991-05-01)
    Article
    Accés obert
    A prototype imaging system for active microwave tomography using cylindrical geometry has been developed, making it possible to obtain images of the dielectric properties of biological targets at 2.45 GHz. This configuration ...
  • Cylindrical geometry: a further step in active microwave tomography 

    Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel; Elias Fusté, Antonio; Rius Casals, Juan Manuel; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1991-05-01)
    Article
    Accés obert
    A prototype imaging system for active microwave tomography using cylindrical geometry has been developed, making is possible to obtain images of the dielectric properties of biological targets at 2.45 GHz. The system ...
  • Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms 

    Vall-Llossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; Cardama Aznar, Ángel (JOHN WILEY & SONS INC, 2000-12-31)
    Article
    Accés obert
    A genetic algorithm (GA) has been developed for designing single-shaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation ...
  • Desplegament de recursos en línea per a l’avaluació i l’autoaprenentage dels alumnes, i foment de l’especialització i competències transversals en el màster MERIT 

    Pradell i Cara, Lluís; Cardama Aznar, Ángel; Canal Bienzobas, Fernando; Jofre Roca, Lluís; Junyent Giralt, Gabriel; Herranz Luis, Jaime; Mallorquí Franquet, Jordi J.; Nadeu Camprubí, Climent; Pagès Zamora, Alba Maria; Pradell i Cara, Lluís; Rius Casals, Juan Manuel; Rodríguez Fonollosa, Javier; Romeu Robert, Jordi; Coderch Collell, Marcel; Kerans, Mary Ellen; Law, Carolyn; García Hernández, Antonio; Gutiérrez Martos, David; Hernández Bonet, Antoni; Ferrer Bosch, Anna; Pérez Trufero, Javier; Torre Lara, Jordi de la; Torres Matabosch, Núria (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2010-02-11)
    Comunicació de congrés / Text en actes de congrés
    Accés obert
    El projecte es desenvolupa en el marc de la titulació oficial de màster MERIT del Departament de Teoria del Senyal i Comunicacions. El màster, orientat a la recerca i integrat dins del programa Erasmus Mundus, presenta ...
  • Diseño y construcción de un sistema compact range reducido hasta 40 ghz 

    Xarrié, Jaume; Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel (Unión Científica Internacional de Radio (URSI), 1990)
    Text en actes de congrés
    Accés obert
    The design of a polarimetric Compact Range system covering 12-40 GHz is presented. Includes a preliminar error analysis, feeder design, and plane wave evaluation.
  • Far-field errors due to random noise in cylindrical near-field measurements 

    Romeu Robert, Jordi; Jofre Roca, Lluís; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-01-31)
    Article
    Accés obert
    A full characterization of the far-field noise obtained from cylindrical near-field to far-field transformation, for a white Gaussian, space stationary, near-field noise is derived. A possible source for such noise is the ...
  • Formación de imagenes de blancos radar mediante tecnicas de apertura sintetica inversa con iluminación de onda esferica en campo próximo (SWISAR) 

    Broquetas Ibars, Antoni; Garriga, Adan; Jofre Roca, Lluís; Cardama Aznar, Ángel (1991)
    Text en actes de congrés
    Accés obert
    The paper presents a new Inverse Synthetic Aperture Radar (ISAR) algorithm intended for radar targets reflectivity imaging from scattering measurements. The method is based on a spherical wave near-field illumination of ...
  • Frequency extrapolation in the integral equation mei 

    Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Mosig, J R (Institution of Electrical Engineers, 1996-12)
    Article
    Accés obert
    An algorithm to extrapolate in frequency the matrix coefficients of the IE-MEI method is presented. This results in a total operation count to compute the induced current in electromagnetic scattering problems proportional ...