Ara es mostren els items 82-101 de 245

    • Diseño optimizado de agrupaciones de antenas planas 

      Clavera, Jordi; Jiménez, Jesús; Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís (Unión Científica Internacional de Radio (URSI), 1990)
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    • Diseño y medida de antenas para un equipo portatil a 1.89 ghz, y su interacción con el cuerpo humano 

      Mallorquí Franquet, Jordi Joan; de Mora, J.; Blanch Boris, Sebastián; Romeu Robert, Jordi; Cardama Aznar, Ángel (Universidad de Málaga, 1992)
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    • Dual band fss with fractal elements 

      Romeu Robert, Jordi; Rahmat-Samii, Y (Institution of Electrical Engineers, 1999-04)
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      Experimental and computed results of a frequency selective surface (FSS) based on a certain type of fractal element are presented. The fractal element is a two iteration Sierpinski gasket dipole. Owing to the dual band ...
    • Dual-band Sierpinski fractal monopole antenna 

      Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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      A new top-loaded reduced-sized dual-band (1.9 GHz and 3.5 GHz) monopole antenna for wireless communications is presented. The antenna provides better than -15 dB input return loss and keeps the same radiation pattern over ...
    • Efecto de errores aleatorios en las medidas en campo próximo en coordenadas cilíndricas 

      Romeu Robert, Jordi; Jofre Roca, Lluís (1991)
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      The far field noise due to a random near field noise is an stochastic process, and it will be shown that for a white gaussian space stationary near field noise, the far field noise is a gaussian non-stationary in elevation ...
    • Efecto de la variación angular en el vértice de alimentación de la antena fractal de Sierpinski 

      Puente Baliarda, Carles; Navarro Bernal, Manuel; Romeu Robert, Jordi; Pous Andrés, Rafael (1997)
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    • Effect of random errors in antenna cylindrical near-field measurements 

      Romeu Robert, Jordi; Jofre Roca, Lluís (Institution of Electrical Engineers, 1991-02)
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      A closed expression for the autocorrelation of the far field noise due to random near field noise in a cylindrical near to far field transformation is derived. This expression is employed to obtain bounds for the computed ...
    • Effect of random errors in cylindrical 

      Romeu Robert, Jordi; Jofre Roca, Lluís (. 1991 IEEE AP-S INTERNATIONAL SYMPOSIUM, 1991)
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      Expressions have been derived previously to predict the effect of random errors in planar near-field measurements. Similar equations for cylindrical near-field measurements are not available. Random errors are due to A/D ...
    • Efficient parametric characterization of the dynamic performance of an RFID IC 

      Capdevila Cascante, Santiago; Jofre Roca, Lluís; Romeu Robert, Jordi; Bolomey, J.Ch (2012)
      Article
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      In this letter, a measurement technique for a complete parametric characterization of the input impedance of an RFID IC is presented. The use of an SPDT switch to modulate the signal from the network analyzer provides ...
    • El "Espacio Innovador" y la red 

      Jofre Roca, Lluís; Solé Parellada, Francesc; Sabaté i Garriga, Ferran; Berenguer Sau, Jordi; Marqués Acosta, Fernando; Romeu Robert, Jordi; Torres Viñals, Jordi (Cátedra Telefónica-UPC, 2005-11)
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    • El 'Espacio Profesional' y la red, más allá del 2005 

      Jofre Roca, Lluís; Solé Parellada, Francesc; Sabaté i Garriga, Ferran; Ezquerra, Norberto; Romeu Robert, Jordi; Torres Viñals, Jordi (Càtedra Telefónica-UPC: Especialización Tecnológica y Sociedad del Conocimiento, 2003-08)
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    • El 'Profesional Innovador' y la red 

      Jofre Roca, Lluís; Solé Parellada, Francesc; Sabaté i Garriga, Ferran; Marqués Acosta, Fernando; Romeu Robert, Jordi; Torres Viñals, Jordi (Cátedra Telefónica-UPC, 2004-12)
      Llibre
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    • 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)
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      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)
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      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
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      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)
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      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)
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      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)
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    • Exact representation of antenna system diversity performance from input parameter description 

      Blanch Boris, Sebastián; Romeu Robert, Jordi; Corbella Sanahuja, Ignasi (2003-05-31)
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      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 ...