Ara es mostren els items 94-113 de 245

    • Electromagnetic modeling and characterization of steel fiber reinforced concrete during the pouring process 

      Roqueta Crusats, Gemma; Romeu Robert, Jordi; Jofre Roca, Lluís (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06)
      Text en actes de congrés
      Accés obert
      In this paper, a complex electromagnetical model for the SFRC is derived, and a mathematical model for the obtention of the effective relative permittivity is described. A static analysis setup is presented and results ...
    • Electromagnetic monitoring of biological microorganisms 

      Zarrinkhat, Faezeh; Garrido, Alejandra; Jofre Roca, Lluís; Romeu Robert, Jordi; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The investigation of the electromagnetic properties of biological cells in the microwave frequencies may enable wireless monitoring of functional activity of microorganisms. Both theoretical and experimental methodologies ...
    • Enhancing RFID sensing capabilities: multi-load backscattering 

      Capdevila Cascante, Santiago; Jofre Roca, Lluís; Romeu Robert, Jordi; Bolomey, Jean Charles (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This conference paper presents some experimental results using the concept of an multi-loaded enhanced RFID tag capable of switching between different loads to fully determine the input impedance of the RFID tag antenna ...
    • Error Bounds Due to Random Noise in Cylindrical Near-Field Measurements 

      Romeu Robert, Jordi; Jofre Roca, Lluís (1991)
      Text en actes de congrés
      Accés obert
      The far field errors due to near field random noise are statistically bounded when performing cylindrical near to far field transform. In this communication, the far field noise variance it is expressed as a function of ...
    • Error vector magnitude, intermodulation and radiation characteristics of a bandwidth and pattern reconfigurable antenna 

      Towfiq, Asaduzzaman; Khalat, Abdurazag Mohamed; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís; Cetiner, Bedri Artug (2019-10)
      Article
      Accés obert
      This letter presents the error vector magnitude (EVM), intermodulation (IM), and radiation performances of a reconfigurable antenna capable of varying its bandwidth between 3.4-3.6 and 3.1-3.9 GHz bands, and steering its ...
    • Errores de posicionado y degradacion de la onda plana sintetizada en medidas de campo próximo 

      Pujolar, Xavier; Romeu Robert, Jordi (1991)
      Text en actes de congrés
      Accés obert
      Positioning errors are an importan! so urce of error in near field measurements. So far there are not expressions available that relate a given positioning error to the far field error. In this communication the cylindrical ...
    • EuCAP 2010: Not raking over the ashes 

      Roqueta Crusats, Gemma; Jofre Cruanyes, Lluís; Sierra, M.; Romeu Robert, Jordi (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2011)
      Article
      Accés obert
    • Exact representation of antenna system diversity performance from input parameter description 

      Blanch Boris, Sebastián; Romeu Robert, Jordi; Corbella Sanahuja, Ignasi (2003-05-31)
      Article
      Accés obert
      A simplc formulation Io compute thc envelope correlation of an antenna divemiry system is dcrired. 11 is shown how to compute the envelope correlation hom the S-parameter descnplian of the antenna system. This approach ...
    • Examen Final 

      Rius Casals, Juan Manuel; Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2014-01-20)
      Examen
      Accés restringit a la comunitat UPC
    • Examen Final 

      Romeu Robert, Jordi; Aguasca Solé, Alberto (Universitat Politècnica de Catalunya, 2014-06-25)
      Examen
      Accés restringit a la comunitat UPC
    • Experimental exploration of longitudinal modes in spherical shells at 220 GHz – 330 GHz: applications to corneal sensing 

      Zarrinkhat, Faezeh; Lamberg, Joel; Baggio, Mariangela; Tamminen, Aleksi; Ala-Laurinaho, Juha; Khaled, Elsayed E. M.; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Taylor, Zachary (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Submillimeter-wave and THz sensing of cornea leverage the layered tissue structure for assessments of corneal water content and thickness. The cornea is bounded by air on the anterior and an optically thick body of water ...
    • Experimental verification of dielectric models with a capacitive wheatstone bridge biosensor for living cells: E. coli 

      Zarrinkhat, Faezeh; Jofre Cruanyes, Marc; Jofre Roca, Lluís; Rius Casals, Juan Manuel; Romeu Robert, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2022-03-23)
      Article
      Accés obert
      Detection of bioparticles is of great importance in electrophoresis, identification of biomass sources, food and water safety, and other areas. It requires a proper model to describe bioparticles’ electromagnetic ...
    • Fabrication and measurement of homemade standard antennas 

      Guardiola Garcia, Marta; Monsalve Carcelen, Beatriz; Calafell Rueda, Irena; Roqueta Crusats, Gemma; Romeu Robert, Jordi (2012)
      Article
      Accés restringit per política de l'editorial
      Apprenticeship is linked to training. This paper is intended to be a tutorial on how to design, fabricate, and measure antennas in an economical and easy way, using recycled materials and common electronic devices such ...
    • 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 imágenes ISAR de alta resolución 

      Fabregas Canovas, Francisco Javier; Romeu Robert, Jordi; Broquetas Ibars, Antoni (1992)
      Text en actes de congrés
      Accés obert
      This paper presents the results of ISAR processing of RCS measurements performed over a broad frequency band (12 GHz - 40 GHz). The main purpose is to reach the highest resolution in reflectivity maps in order to identify ...
    • Formulación espectral de la radiación: aplicación al caso cilíndrico 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 1991-07-08)
      Tesi
      Accés obert
      Formulación espectral de la radiación en coordenadas cartesianas, cilíndricas y esféricas. Aplicación de la formulación a problemas de diagnostico de antenas, análisis del efecto de radomos y transformación campo próximo ...
    • Fourier analysis of submillimeter-wave scattering from the human cornea 

      Zarrinkhat, Faezeh; Lamberg, Joel; Tamminen, Aleksi; Baggio, Mariangela; Ala-Laurinaho, Juha; Khaled, Elsayed E. M.; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Taylor, Zachary (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      Wave scattering from a human cornea illuminated with a submillimeter-wave Gaussian beam is explored with Fourier analysis. This new approach enabled us to investigate the cornea as a coated sphere rather than a homogenized ...
    • Fractal FSS: a novel dual band frequency selective surface 

      Romeu Robert, Jordi; Rahmat-Samii, Yahya (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-07-31)
      Article
      Accés obert
      The multiband properties of self-similar fractals can be advantageously exploited to design multiband frequency selective surfaces (FSS). A Sierpinski dipole FSS has been analyzed and measured and the results show an ...
    • Fractal multiband antenna based on the sierpinski gasket 

      Puente Baliarda, Carles; Romeu Robert, Jordi; Pous Andrés, Rafael; García, X; Benítez, F (Institution of Electrical Engineers, 1996-01)
      Article
      Accés obert
      Experimental and computed results show a multiband behaviour over five bands for the new fractal Sierpinski antenna. Such a behaviour is based on the self-similarity properties of the antenna's fractal shape, which might ...
    • Fractal multiband patch antenna 

      Borja, C.; Puente Baliarda, Carles; Romeu Robert, Jordi; Anguera Pros, Jaume (European Space Agency (ESA), 2000)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The multiband behaviour of the Sierpinski patch antenna is described in this paper. Experimental results show that the self similarity properties of the fractal shape are translated into its electromagnetic behaviour.