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Ara es mostren els items 41-60 de 63

    • Infrared thermograms applied to near-field testing 

      González Arbesú, José María; Aguasca Solé, Alberto; Blanch Boris, Sebastián; Romeu Robert, Jordi (European Space Agency, 2000)
      Text en actes de congrés
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      Electromagnetic fields close to radiant structures can be measured quickly using an infrared camera. Examples of induced fields by wire antennas over a detection screen at distances shorter than one wavelength are presented. ...

    • Input impedance measurements of cell phone antennas using backscattering modulation 

      Monsalve, Beatriz; Blanch Boris, Sebastián; Romeu Robert, Jordi (2012)
      Text en actes de congrés
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      This contribution presents an overview of the backscattering modulation applied to input impedance measurements of cell phone antennas.

    • Lens based switched beam antenna for a 5G smart repeater 

      Romeu Robert, Jordi; Blanch Boris, Sebastián; Pradell i Cara, Lluís; Barlabe Dalmau, Antoni; Rius Casals, Juan Manuel; Albert Galí, Miquel; Jofre Roca, Lluís; Mazzucco, Christian; Flamini, Roberto (2023-10)
      Article
      Accés obert
      A 16 switched beam lens based antenna with a coverage area of ±30° in the horizontal plane and from 0 to -20° in the vertical plane has been built and tested. The intended use of the antenna is as part of a smart repeater ...

    • LTCC-based dielectric flat lens performance evaluation at 94 GHz 

      Imbert Villà, Marc; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís; Baquero Escudero, M. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      The design and performance evaluation of an inhomogeneous LTCC-based dielectric flat lens at 94 GHz is presented. A previously introduced dielectric flat lens design with its effective permittivity (r) circularly distributed ...

    • Magnetoelectric dipole antenna framework supporting orbital angular momentum modes 

      Jofre Cruanyes, Marc; Akazzim, Youness; Blanch Boris, Sebastián; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (2024-04)
      Article
      Accés restringit per política de l'editorial
      The ability to utilize resources to meet the need of growing diversity of communication services and user behavior marks the future of cognitive wireless communication systems. Cognitive wireless technologies for vehicular ...

    • Multiport small integrated antenna impedance matrix measurement by backscattering modulation 

      Monsalve, Beatriz; Blanch Boris, Sebastián; Romeu Robert, Jordi (2013-01)
      Article
      Accés restringit per política de l'editorial
      A method to characterize small antennas in their actual operating conditions is presented. The proposed procedure is based on the radar cross section (RCS) measurement technique using backscattering modulation. A theoretical ...

    • Near field in the vicinity of wireless base-station antennas: an exposure compliance approach 

      Blanch Boris, Sebastián; Romeu Robert, Jordi; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-05-31)
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      Accés obert
      Great social concern has risen about the potential health hazard of living near a cellular telephony base-station antenna, and certain technical questions have been posed on the appropriate way to measure exposure in ...

    • near field to far field tranfsormation of bipolar measurements by equivalent magnetic current approach 

      Blanch Boris, Sebastián; Romeu Robert, Jordi (ieee ieee, 1996)
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      An equivalent magnetic current (EMC) approach has been proposed as an alternative method to the classical modal formulation for computing the far-field pattern of a radiating antenna from planar near-field measurements. ...

    • Optically beamformed wideband array performance 

      Jofre Roca, Lluís; Stoltidou, Chysavgi; Blanch Boris, Sebastián; Mengual, Teresa; Vidal, Borja; Marti, Javier; Mckenzie, Iain; Cura, J.M. del (2008-06)
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      Accés obert
      Optical beamforming networks (OBFNs) are an interesting alternative for the design of wideband antenna arrays, mainly due to their low losses and weight, their high parallel processing capabilities and their electromagnetic ...

    • Optimization of linear multielement antennas for selection combining by means of a Butler matrix in different MIMO environments 

      Grau Besolí, Alfred; Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-11-30)
      Article
      Accés obert
      An optimized linear multielement antenna (MEA) is presented for selection combining schemes that improves the selection diversity gain and selection diversity capacity in medium and low multipath environments, with ...

    • Planar array diagnostic from cylindrical near-field measurements 

      Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1990)
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    • Projecte CLEAR: Collaborative Learning on ECTS Array Resolution 

      Anton, Mireia; Romeu Robert, Jordi; Jofre Roca, Lluís; Blanch Boris, Sebastián; Gonzalez, J.M.; Cardama Aznar, Ángel; Rius Casals, Juan Manuel (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2005-02)
      Text en actes de congrés
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      El Projecte CLEAR s’emmarca en el procés de desenvolupament del mòdul d’aprenentatge interactiu “Array Antennas” en el context de l’assignatura d’Antenes de l’Escola Tècnica Superior Enginyeria de Telecomunicació ...

    • Pulsar navigation 

      Sala Álvarez, José; Urruela Planas, Andreu; Villares Piera, Nemesio Javier; Romeu Robert, Jordi; Blanch Boris, Sebastián; Estalella Boadella, Robert; Paredes, J. M. (European Space Agency (ESA), 2008-12-31)
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      Accés restringit per política de l'editorial
      This paper evaluates the fundamental performance bounds, signal processing and technological complexity associated with the synchronization to radio and X-ray pulsars as well as its impact on the positioning accuracy of ...

    • Reconfigurable dual-polarized beam-steering broadband antenna using a crossed-strips geometry 

      Ramírez Arroyave, Germán Augusto; Zhou, Ivan; Blanch Boris, Sebastián; Towfiq, Asaduzzaman; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2021-08)
      Article
      Accés obert
      In this letter, a reconfigurable dual-polarized broadband antenna with beam-steering capabilities using a parasitic layer is proposed for 5G new radio (NR) frequency range 1 (FR-1) applications. The antenna is a dual-port ...

    • RFID based probes for EM-field measurements 

      Capdevila Cascante, Santiago; Massud, Muhammad; Serrano, Raquel; Aguasca Solé, Alberto; Blanch Boris, Sebastián; Romeu Robert, Jordi; Bolomey, J.Ch; Jofre Roca, Lluís (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
      Text en actes de congrés
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      In this paper the use of RFID for EM field measurement is studied. A novel RFID antenna with high tuning capabilities is presented and measured, and it is used in combination with several RFID IC to measure the EM ...

    • Self-similar prefractal frequency selective surfaces for multiband and dual-polarized applications 

      Gianvittorio, John P.; Romeu Robert, Jordi; Blanch Boris, Sebastián; Rahmat-Samii, Yahya (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-01-31)
      Article
      Accés obert
      Frequency-selective surfaces (FSS) that have been designed using the iterative techniques of fractals have been fabricated and measured. Fractals contain many scales of the starting geometry, each of which acts as a ...

    • Sensitivity study of the microwave spiralimetric imaging 

      Jofre Roca, Lluís; Blanch Boris, Sebastián; Cardama Aznar, Ángel; Rius Casals, Juan Manuel; Torner Sabata, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2005)
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      The use of the spiral modes-electromagnetically related to the orbital momentum of the photons- at microwave frequencies for imaging purposes is studied and some preliminary numerical and experimental results for basic ...

    • Sistema de adquisición y procesado de datos en campo próximo esférico 

      González Arbesú, José María; Blanch Boris, Sebastián (1991)
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      Near field antenna measurements supply e qua! or more accurate results than far field measurements, its main dijficulty is the post processing of the data measured in the anechoic chamber. In this paper we show a measurement ...

    • Small UAV radiocommunication channel characterization 

      Romeu Robert, Jordi; Aguasca Solé, Alberto; Alonso Valdesueiro, Javier; Blanch Boris, Sebastián; Martins, Ricardo (2010)
      Text en actes de congrés
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      Small Unmanned Aerial Vehicles (UAV) are finding different applications as platforms to carry observation payloads. The need to establish reliable high data rate channels requires to characterize the radiocommunication ...

    • Study of interconnecting switch currents in reconfigurable parasitic layer antennas 

      Ramirez, German; Araque, Javier; Ballesteros Sánchez, Christian; Blanch Boris, Sebastián; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (2019)
      Comunicació de congrés
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      This work presents an approach for calculating the currents across the switches of a reconfigurable parasitic layer intended to add beam-steering capabilities to a reference antenna. The method of analysis is based on the ...