Now showing items 21-40 of 217

    • A submillimeter wave parabolic reflector by additive manufacturing 

      Romeu Robert, Jordi; Aguasca Solé, Alberto; Blanch Boris, Sebastián; O'Callaghan Castellà, Juan Manuel; Jofre Roca, Lluís; Buitrago Ventura, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      The manufacturing of prototype of an offset parabolic reflector to operate at 120 GHz is presented. The paper describes the different metallization options to achieve a good performance.
    • Active zone self-similarity of fractal sierpinski antenna verified using infra-red thermograms 

      González, J.M.; Navarro Bernal, Manuel; Puente Baliarda, Carles; Romeu Robert, Jordi; Aguasca Solé, Alberto (Institution of Electrical Engineers, 1999-08)
      Article
      Open Access
      The surface current distribution of a Sierpinski fractal antenna shows a self-similar behaviour determined by the self-similar properties of its geometry. The application of infra-red thermography to electromagnetic near ...
    • ACÚSTICA 2 (Examen 2n quadrimestre, 2n parcial) 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2016-06-07)
      Exam
      Restricted access to the UPC academic community
    • ACÚSTICA 2 (Examen 2n quadrimestre, 2n parcial) 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2017-06-19)
      Exam
      Restricted access to the UPC academic community
    • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2014-06-16)
      Exam
      Restricted access to the UPC academic community
    • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2013-06-12)
      Exam
      Restricted access to the UPC academic community
    • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2012-06-08)
      Exam
      Restricted access to the UPC academic community
    • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

      Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2015-06-11)
      Exam
      Restricted access to the UPC academic community
    • Agrupación plana alimentada por linea de sustrato suspendido 

      Torrents Dolz, Josep M.; Romeu Robert, Jordi; Jofre Roca, Lluís (1989)
      Conference report
      Open Access
      The purpose of this design is a new type of planar antenna with hi gh-efficency and large-bandwidth requirements of TVRO. A low loss suspended substrate line (SSL ) has been developed and optimisated for feed network.
    • 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
      Open Access
      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 ...
    • An architecture analysis for millimeter-wave optically steerable antenna array 

      Ballesteros Sánchez, Christian; Maestre, Marcos; Santos Blanco, M. Concepción; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      A lens-based integrated photodiode-antenna array for a Radio over Fiber (RoF) 5G wireless base station at millimeter-wave frequencies is proposed and analyzed. The elements of the array are based on slot bow-tie antennas ...
    • 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
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      Conference report
      Open Access
      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)
      Conference report
      Open Access
    • Antenas 

      Cardama Aznar, Ángel; Jofre Roca, Lluís; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Blanch Boris, Sebastián; Ferrando Bataller, Miguel (Edicions UPC, 2002)
      Book
      Restricted access to UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC users
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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 ...