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Ara es mostren els items 31-50 de 248

    • An iterative model for fractal antennas: application to the Sierpinski gasket antenna 

      Puente Baliarda, Carles; Borja Borau, M.Carmen; Navarro Rodero, Mònica; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05-31)
      Article
      Accés obert
      A simple model that explains the behavior of the Sierpinski fractal antenna is presented. This model shows that the multiband behavior of the Sierpinski fractal antenna is a consequence of its fractal nature. The model is ...

    • An optimum method to design probe-fed single-layer single-path wideband microstrip antenna 

      Anguera Pros, Jaume; Puente Baliarda, Carles; Romeu Robert, Jordi; Borja, C.; Font, Gisela (European Space Agency (ESA), 2000)
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      Accés restringit per política de l'editorial
      A simple electrical network for a Single Layer Microstrip Patch Antenna (SLMPA) and the feeding structure (coaxial probe and compensating capacitor) is proposed to predict the input impedance. The mathematical analysis ...

    • Análisis de Errores de Medida en Campo Próximo Cilíndrico 

      Soneira Ferrando, M. José; Clavera, Jordi; Jofre Roca, Lluís; Romeu Robert, Jordi; de los Reyes, Elías (Universidad Politécnica de Madrid (UPM), 1988)
      Text en actes de congrés
      Accés obert
      A prograrn to compute near and far fields generated by a planar array has been developed . Sirnulations on the effect of antenna and rnesurernent errors in the cylindrical near-far field transforrnations algorithrns have ...

    • Análisis de la difracción de cuerpos metálicos mediante el método incremental 

      Broquetas Ibars, Antoni; Romeu Robert, Jordi; Jofre Roca, Lluís (1989)
      Text en actes de congrés
      Accés obert
      An incremental method for diffraction analysis of metalic bodies of arbitrary shape is presented. The algorithm has been evaluated for metalic cylinders and for tridimensional bodies using a scalar approximation of the field.

    • Antena impresa de banda ancha 

      Pérez, Luis Andrés; Romeu Robert, Jordi (Unión Científica Internacional de Radio (URSI), 1990)
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    • 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 als usuaris de la UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC
      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. ...

    • Antenna input impedance measurement using multi-load MST 

      Romeu Robert, Jordi; Capdevila Cascante, Santiago; Bolomey, Jean Charles; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      This paper presents the practical use of modulated scatterer technique (MST) for the measurement of the antenna input impedance using a multi-load automatic switching device, and it also includes the analysis of the ...

    • Antenna packaging for in-body applications 

      Romeu Robert, Jordi; González López, Giselle; Blanch Boris, Sebastián; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      A cylindrical mode expansion of the fields produced by an embedded antenna is used to determine the dimensions of the antenna packaging in order to minimize antenna impedance changes when the antenna is immersed in a varying ...

    • Antenna reconfigurability based on a novel parasitic pixel layer 

      Rodrigo López, Daniel; Damgaci, Yasin; Unlu, M.; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (2011)
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      A novel reconfiguration method based in the use of pixel surfaces as parasitic elements is presented. This concept can be used to provide reconfigurability to a wide variety of non-reconfigurable antennas without requiring ...

    • Aplicación del método de la descomposición modal al análisis de radomos esféricos 

      Romeu Robert, Jordi (Universidad de Málaga, 1992)
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    • Aprendizaje y asistencia virtual en red 

      Fuentes Fort, Maria; González Bermúdez, Meritxell; Guardiola Garcia, Marta; Jofre Roca, Lluís; Romeu Robert, Jordi; Vallverdú Bayés, Sisco (2011-01-20)
      Report de recerca
      Accés obert
      Favorecer el uso de las Tecnologías de Información y la Comunicación (TIC) en entornos educativos puede abarcar varios aspectos del proceso de aprendizaje. La incorporación de TICs en las aulas contribuye, por un lado a ...

    • Aprendizaje y asistencia virtual en red /Aprenentatge i assistència virtual en xarxa 

      Jofre Roca, Lluís; Romeu Robert, Jordi; Vallverdú Bayés, Sisco; Fuentes Fort, Maria; Guardiola Garcia, Marta (Universitat Politècnica de Catalunya. Càtedra Telefónica-UPC, 2011-01)
      Llibre
      Accés obert

    • Aprendizaje y asistencia virtual en red : la prueba Piloto : Cátedra Telefófica UPC : Análisis de le evolución y tendencias futuras de la sociedad de la información 

      Fuentes Fort, Maria; González Bermúdez, Meritxell; Guardiola Garcia, Marta; Jofre Roca, Lluís; Romeu Robert, Jordi; Vallverdú Bayés, Sisco (2011-07-29)
      Report de recerca
      Accés obert
      Hemos llevado a cabo una prueba piloto, demostradora del uso de las tecnologías del lenguaje y el habla aplicadas al aprendizaje de inglés. En general, se espera que la actividad acerque al alumno el máximo posible a la ...

    • Are space-filling curves efficient small antennas? 

      González Arbesú, José María; Blanch Boris, Sebastián; Romeu Robert, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC., 2003-09-30)
      Article
      Accés obert
      The performance of space-filling curves used as small antennas is evaluated in terms of quality factor and radiation efficiency. The influence of their topology is also considered. Although the potential use of these ...

    • Assessment of 3-D printing technologies for millimeter-wave reflectors 

      Romeu Robert, Jordi; Blanch Boris, Sebastián; Vidal, Neus; Lopez-Villegas, Jose Maria; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
      Article
      Accés obert
      Three different 3D printing technologies: Stereolithography (SLA), Fused Deposition Modeling (FDM) and HP Multi Jet Fusion Technology (MJF) are compared to build a parabolic reflector operating at 100 GHz. Fabrication ...

    • Assessment of LTCC-based dielectric flat lens antennas and switched-beam arrays for future 5G millimeter-wave communication systems 

      Imbert Villà, Marc; Romeu Robert, Jordi; Baquero Escudero, M.; Martinez Ingles, Maria Teresa; Molina-Garcia Pardo, Jose Maria; Jofre Roca, Lluís (2017-10-30)
      Article
      Accés obert
      IEEE This paper presents design, LTCC fabrication, and full experimental verification of novel dielectric flat lens antennas for future high data rate 5G wireless communication systems in the 60 GHz band. We introduce and ...

    • Assessment of mmwave handset arrays in the presence of the user body 

      Ballesteros Sánchez, Christian; Vähä-Savo, Lauri; Haneda, Katsuyuki; Icheln, Clemens; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
      Article
      Accés obert
      The emergence of mobile terminals operating at millimeter-wave frequencies necessitates the ability to evaluate the effect the environment, and in particular, users have on their radiation properties. Some studies evaluated ...

    • Automatic polyp detection using microwave endoscopy for colorectal cancer prevention and early detection: phantom validation 

      Garrido Atienza, Alejandra; Sont Colomer, Roberto; Dghoughi, Walid; Marcoval Martínez, Sergi; Romeu Robert, Jordi; Fernández-Esparrach, Glòria; Belda Reig, Ignasi; Guardiola Garcia, Marta (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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      Accés obert
      A system to integrate microwave imaging with optical colonoscopy is presented. The overarching goal is to improve the prevention and early diagnosis of one of the main health and economic burdens of an increasingly aging ...

    • Automotive radar and radome calibration to improve the direction of arrival detection performance 

      Buitrago Ventura, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      Accés restringit per política de l'editorial
      An assessment of the improvement in the Direction of Arrival (DoA) measurements in automotive radar sensor by joint calibration of the radar sensor plus the radome is presented. Nowadays, radar sensors are calibrated before ...

    • Beamforming antennas for 60 GHz positioning systems 

      Toda, Annapapió; Romeu Robert, Jordi; Jofre Roca, Lluís; de Flaviis, Franco (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Accés restringit per política de l'editorial
      In this paper we analyze the benefit of using phased arrays as the receiving antennas of indoor location systems. A 60 GHz code division multiple access carrier-based ultra-wide band positioning system for the simultaneous ...