Now showing items 1-20 of 206

  • 100 GHz MST retina for real time near field imaging 

    Garg, Vaibhav (Universitat Politècnica de Catalunya, 2012-06-26)
    Master thesis
    Open Access
    [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 ...
  • 60GHz material characterization and waveguide antenna array design 

    Papio Toda, Anna (Universitat Politècnica de Catalunya, 2009-01-08)
    Master thesis (pre-Bologna period)
    Open Access
    Cálculo de la permitividad compleja de materiales usados en PCB y diseño de una agrupación de antenas para la banda de 60GHz.
  • A communication-based algorithm to avoid the human body effect on antennas 

    Martínez García, Javier (Universitat Politècnica de Catalunya, 2011-07-21)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  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
    Restricted access - publisher's policy
    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 ...
  • Active microwave imaging: a cylindrical system for biomedical applications 

    Jofre Roca, Lluís; Broquetas Ibars, Antoni; Hawley, Mark (1988)
    Conference report
    Open Access
    The authors examine the use of active microwave tomography as an imaging technique which gives information on the dielectric properties of the body. They show that a cylindrical system is an efficient option to obtain ...
  • Advanced embedded UWB T-Match Antenna System for RFID sensing 

    González López, Giselle (Universitat Politècnica de Catalunya, 2018-07)
    Master thesis
    60 months embargo
    A great deal of interest is placed nowadays in the so called Internet of Things (IoT), it is said to be part of the society of the future where all devices are at the same time connected to the internet and among them. ...
  • Advances in antenna technology for wireless handheld devices 

    Anguera Pros, Jaume; Andújar Linares, Aurora; Huynh, Minh-Chau; Orlenius, Charlie; Picher, Cristina; Puente Baliarda, Carles (2013)
    Article
    Open Access
    The constant evolution of wireless handheld devices together with the apparition of multiple wireless communication systems fosters the antenna community to design new radiating and measurements systems capable of satisfying ...
  • 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)
    Conference lecture
    Restricted access - publisher's policy
    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.
  • Agrupación submuestreada operando en modo fractón utilizando antenas microstrip inspiradas en el fractal de Sierpinski 

    Anguera Pros, Jaume; Montesinos, Gemma; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (Unión Científica Internacional de Radio (URSI), 2003)
    Conference report
    Open Access
    A high-directivity microstrip array using mul- tilevel elements based on a fractal geometry is theoretically compared with one using a circular patches. Within the same electrical area, the same directivity can be ...
  • 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
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Alineament d'interferències, gestió d'interferències i diversitat de polarització 

    Gurrera Edo, Aniol (Universitat Politècnica de Catalunya, 2015-03-19)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] This project deals with the interference management in multiuser environments through the K-User MxN MIMO Interference Channel (IC)
  • 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
    Restricted access - publisher's policy
    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 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
    Restricted access - publisher's policy
    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 ...
  • A microstrip array operating in a fracton mode [fractal geometry] 

    Anguera Pros, Jaume; Montesinos, Gemma; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2003)
    Conference report
    Restricted access - publisher's policy
    A high-directivity microstrip array using multilevel elements based on a fractal geometry is theoretically compared with one using a circular patches. Within the same electrical area, the same directivity can be obtained. ...
  • A microwave invisibility cloak: the design, simulation, and measurement of a simple and effective frequency-selective surface-based mantle cloak 

    Yuste, Pedro; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Blanch Boris, Sebastián; Heldring, Alexander; Úbeda Farré, Eduard (2018-06-26)
    Article
    Open Access
    In recent years, there has been a growing interest in developing invisibility cloaks that can conceal an object. These techniques are often based either on coating a dielectric or conducting object with a homogeneous ...
  • Analisis de antenas de reflector mediante procesado grafico 

    Rius Casals, Juan Manuel (1991)
    Conference report
    Open Access
    This paper shows a fast algorithm to calculate first contribution to the pattern radiation of a reflector antenna using the hardware capabilities of a high performance graphic workstation . It allows to design interactively ...
  • 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 Soluciones de Antena para Smartphones 

    Teotino Márquez, Anna (Universitat Politècnica de Catalunya, 2015-11)
    Master thesis (pre-Bologna period)
    Open Access
    Nowadays phones must integrate a great number of services in a limited space in order to satisfy the user demands. New frequency bands appear for allocate new communication standards and the physical limitations of the ...
  • An alternative wearable tracking system based on a low-power wide-area network 

    Fernández García, Raúl; Gil Galí, Ignacio (2017-03-14)
    Article
    Open Access
    This work presents an alternative wearable tracking system based on a low-power wide area network. A complete GPS receiver was integrated with a textile substrate, and the latitude and longitude coordinates were sent to ...