Now showing items 1-20 of 200

  • 100 GHz retina for THz tomographic imaging 

    Alonso, Maria; Guerra, C.; Nova, Enrique; Abril, Jordi; Romeu Robert, Jordi; Llombart, Nuria; Jofre Roca, Lluís (2011)
    Conference report
    Restricted access - publisher's policy
    In a tomographic imaging system, the key is to collect a sufficient number of scattered field points to recover the currents in the inverse scattering problem. This can be accomplished by using a real array of multiplexed ...
  • 3D arrayed microwave tomographic system for medical imaging 

    Guardiola Garcia, Marta; Jofre Roca, Lluís; Gedda, F.; Capdevila Cascante, Santiago; Romeu Robert, Jordi; Blanch Boris, Sebastián (2010)
    Conference report
    Open Access
    In this paper, a combined tomographic imaging system comprising the rotation of a multiplexed linear antenna array around the object under test is designed. With this system a cylindrical sampling is obtained, allowing to ...
  • 3-D printed UWB microwave bodyscope for biomedical measurements 

    Rashid, Saba; Jofre Roca, Lluís; Garrido, Alejandra; González, Giselle; Ding, Yongsheng; Aguasca Solé, Alberto; O'Callaghan Castellà, Juan Manuel; Romeu Robert, Jordi (2019-02-15)
    Article
    Open Access
    In this letter, a three-dimensional (3-D) printed compact ultrawideband (UWB) extended gap ridge horn (EGRH) antenna designed to be used for biological measurements of the human body is described. The operational frequency ...
  • 3D UWB magnitude-combined tomographic imaging for biomedical applications. Algorithm validation 

    Guardiola Garcia, Marta; Jofre Roca, Lluís; Capdevila Cascante, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi (2011-06)
    Article
    Open Access
    Biomedical microwave imaging is a topic of continuous research for its potential in different areas especially in breast cancer detection. In this paper, 3D UWB Magnitude-Combined tomographic algorithm is assessed for ...
  • 3D UWB tomography for medical imaging applications 

    Guardiola Garcia, Marta; Jofre Roca, Lluís; Romeu Robert, Jordi (2010)
    Conference report
    Open Access
    In this paper, a novel 3D UWB tomographic algorithm has been presented for brain hemorrhagic stroke detection. While 2D reconstructions are unable to distinguish between features at different heights, 3D reconstructions ...
  • 60GHz channel characterization using a Scatterer Mapping Technique 

    Papió, Anna; Grau, Alfred; Balcells Ventura, Jordi; Romeu Robert, Jordi; Jofre Roca, Lluís; Flaviis, Franco de (2010)
    Conference report
    Open Access
    In this paper, a Scatterer Mapping Technique based on a Multi-Frequency Bi-focusing operator with good imaging capabilities is used to characterize the 60GHz wireless channel in an office environment. The measurement data ...
  • A combined spectral-parabolic equation approach for propagation prediction in tunnels 

    Izquierdo Fernandez, Benjamin; Alonso, Javier; Capdevila Cascante, Santiago; Romeu Robert, Jordi (2010)
    Conference report
    Open Access
    Several techniques can be used to study electromagnetic propagation in tunnels. A combination of two of such techniques is presented in this paper to model propagation inside a rectangular tunnel. They are combined in ...
  • A compact dual-band planar monopole antenna using fractal rings and A Y-shaped feeding transmission line 

    Djafri, Kahina; Challal, Mouloud; Romeu Robert, Jordi (De Gruytr, 2018-01-01)
    Article
    Open Access
    This paper presents a novel design approach of a compact dual-band monopole antenna with an overall size of 18.9x13x1.6mm3. The proposed antenna is composed of a fractal ring shaped patch fed by a Y-shaped transmission ...
  • A contact-less small antenna characterization through impedance modulation 

    Monsalve Carcelen, Beatriz; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Conference report
    Open Access
    In smalls antennas S-parameters measurements are highly influenced by the measurement equipment as well as the environment. In order to avoid this inconvenience, a wireless and non-invasive characterization setup is required. ...
  • 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, 2017-06-19)
    Exam
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  • ACÚSTICA 2 (Examen 2n quadrimestre, 2n parcial) 

    Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2016-06-07)
    Exam
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  • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

    Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2012-06-08)
    Exam
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  • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

    Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2013-06-12)
    Exam
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  • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

    Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2015-06-11)
    Exam
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  • ACÚSTICA II (Examen 2n quadrimestre, 2n parcial) 

    Romeu Robert, Jordi (Universitat Politècnica de Catalunya, 2014-06-16)
    Exam
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  • A cylindrical system for quasy-real time microwave tomography 

    Jofre Roca, Lluís; Reyes, E De Los; Ferrando Bataller, Miquel; Elias Fusté, Antoni; Romeu Robert, Jordi; Baquero, M; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 1986)
    Conference report
    Open Access
    A cylindrical system for biomedical microwave tomography is presented. The circular algorithms and some numerical reconstructions are discussed. Finally the experimental set-up is described and some preliminary measurements ...
  • A figure-of-merit for pattern reconfigurable antennas 

    Rodrigo López, Daniel; Romeu Robert, Jordi; Capdevila Cascante, Santiago; Jofre Roca, Lluís (2013-03)
    Article
    Restricted access - publisher's policy
    The performance of pattern reconfigurable antennas is evaluated with the purpose of deriving a figure-of-merit for pattern reconfigurability. A general formulation is provided for the average gain achieved by a ...
  • A figure of merit to assess the performance of photoconductive antennas at terahertz band 

    Romeu Robert, Jordi; Cea Falcó, Marc de; Jofre Roca, Lluís; Yazgan, Ahmet Utku (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    Photoconductive antennas are one of the most efficient ways to radiate and receive EM waves around the 1 THz frequency band. The physical processes involved in photoconductive terahertz signal generation are complex enough ...
  • 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.