Exploració per tema "Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Antenes i agrupacions d'antenes"

Ara es mostren els items 1-20 de 402

    • 100 GHz MST retina for real time near field imaging 

      Garg, Vaibhav (Universitat Politècnica de Catalunya, 2012-06-26)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] For an imaging system, a good compromise is needed between the resolution of the image and the penetration ability of the electromagnetic wave. In order to obtain a good resolution, a high frequency system is ...

    • 100 GHz retina for THz tomographic imaging 

      Alonso, Maria; Guerra, C.; Nova, Enrique; Abril, Jordi; Romeu Robert, Jordi; Llombart, Nuria; Jofre Roca, Lluís (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...

    • 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
      Accés obert
      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 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)
      Text en actes de congrés
      Accés obert
      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 ...

    • 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
      Accés obert
      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 ...

    • 5G automotive antenna design and integration 

      Febrer Mercadal, Adrià (Universitat Politècnica de Catalunya, 2022-07-08)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      This report represents the study and results of my 5G Automotive antenna design and integration project. The aperture of a whole new frequency band dedicated to 5G mmWave communications will represent a huge step forward ...

    • 5G Evaluation platform for connected and autonomous vehicles 

      Romero Garrido, Alejandro (Universitat Politècnica de Catalunya, 2021-10-25)
      Treball Final de Grau
      Accés obert
      La nueva generación de comunicaciones móviles, es decir, 5G, promete una capacidad sin precedentes, vínculos y flexibilidad para admitir una amplia variedad de casos de uso. Se espera que la mejora en rendimiento en términos ...

    • A combined spectral-parabolic equation approach for propagation prediction in tunnels 

      Izquierdo Fernandez, Benjamin; Alonso, Javier; Capdevila Cascante, Santiago; Romeu Robert, Jordi (2010)
      Text en actes de congrés
      Accés obert
      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 communication-based algorithm to avoid the human body effect on antennas 

      Martínez García, Javier (Universitat Politècnica de Catalunya, 2011-07-21)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Qing hua da xue
      English: The aim of this project is to design and implement a simple and reliable system able to minimize the negative effect that users cause on the antenna performance of mobile devices when interacting with these. The ...

    • 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
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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. ...

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...

    • A figure-of-merit for pattern reconfigurable antennas 

      Rodrigo López, Daniel; Romeu Robert, Jordi; Capdevila Cascante, Santiago; Jofre Roca, Lluís (2013-03)
      Article
      Accés restringit per política de l'editorial
      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 frequency reconfigurable cell for beam-scanning reflectarrays 

      Rodrigo López, Daniel; Jofre Roca, Lluís; Perruisseau Carrier, Julien (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Reflectarray antennas are excellent candidates for beam-scanning applications thanks to their low loss, light and quasi-planar structure and ease of electronic control. However, reflectarray antennas suffer from narrower ...

    • A graphene based plasmonic antenna design for communication in the THz regime 

      Suessmeier, Christoph; Schaeffer, Stephan; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José; Hosseininejad, Seyed Ehsan; Wigger, Anna K.; Stock, Daniel; Wagner, Stefan; Cabellos Aparicio, Alberto; Lemme, Max; Bolívar, Peter Haring (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      We show the first THz emission of a graphene based plasmonic antenna structure. Furthermore we present the minimum material requirements for an operational graphene antenna in terms of chemical potential µc and relaxation time t.

    • A high-resolution UWB IR superregenerative receiver front end with an SRD quench shaper 

      Moncunill Geniz, Francesc Xavier; Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2012-02-03)
      Article
      Accés restringit per política de l'editorial
      We present a simple receiver front end that makes use of the baseband superregeneration principle to detect ultrawideband (UWB) impulse radio signals. The UWB antenna is directly connected to the core circuit consisting ...

    • A Ku band circularly polarized 2×2 microstrip antenna array for remote sensing applications 

      Ferré, Roger; Mira, Fermín; Luzi, Guido; Mateu Mateu, Jordi; Kalialakis, C. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper reports the development of a Circularly Polarized (CP) microstrip patch array working at Ku band and in particular between 16.9-17.2GHz for remote sensing applications. The design is based on a sequential ...

    • A low-complexity method for antenna selection in spatial modulation systems 

      Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013-11-13)
      Article
      Accés restringit per política de l'editorial
      In this Letter, a low-complexity Euclidean distancebased method for antenna subset selection in Spatial Modulation systems is presented. The proposed method avoids the high complexity of both the optimal exhaustive ...

    • A low-profile textile MIMO antenna using felt substrate for industrial, scientific and medical band 

      Ullah, Sana; Fernández García, Raúl; Gil Galí, Ignacio (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A low profile textile MIMO antenna design for Industrial scientific and medical bands at 5.8 GHz is presented. The design consists of 2 embroidered antennas based on vertical and horizontal strips with a shared partial ...

    • A mechanism to electrically enlarge the ground plane of handset antennas: A bandwidth enhancement technique 

      Anguera, Jaume; Andújar Linares, Aurora; Puente Baliarda, Carles (2011-07)
      Article
      Accés restringit per política de l'editorial
      There is a need of developing new techniques for enhancing the bandwidth of handset antennas without increasing the antenna volume in order to incorporate more frequency bands into the cell phones. The technique to enhance ...