Now showing items 1-20 of 114

  • Accelerated direct solution of the method-of-moments linear system 

    Heldring, Alexander; Tamayo, J.M.; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (2012-08)
    Article
    Restricted access - publisher's policy
    This paper addresses the direct (noniterative) solution of the method-of-moments (MoM) linear system, accelerated through block-wise compression of the MoM impedance matrix. Efficient matrix block compression is achieved ...
  • Active corner reflector with circularly polarized array antennas to be used as a transponder for sentinel - 1 Satellite (C - band) 

    Ferre Tenas, Roger (Universitat Politècnica de Catalunya, 2018-10-30)
    Master thesis
    Restricted access - author's decision
    Covenantee:  Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
    This master thesis is about the study of an Active Corner Reflector (ACR) to be used in C-band for Sentinel-1 satellite. The purpose is to design and implement a prototype to test to extract the first outcomes and suggestion ...
  • 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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Análisis del comportamiento de antenas móviles multibanda en presencia del cuerpo humano 

    Risco, S.; Anguera Pros, Jaume; Andújar Linares, Aurora; Picher, Cristina; Puente Baliarda, Carles (Unión Científica Internacional de Radio (URSI), 2009)
    Conference report
    Open Access
    The great majority of wireless devices are used close to the human head. These changes the antenna performance compared to free space situation. The human head absorbs an amount of power from the antenna radiation. In ...
  • Analysis and calibration of Ground Penetrating Radar shielded antennas 

    Rasol, M.; Pérez Gracia, María de la Vega; Santos Assunçao, Sonia (2018)
    Conference report
    Open Access
    Ground-Penetrating Radar (GPR) is a non-destructive geophysical method applied in many civil engineering applications. The knowledge of the GPR antennas behavior is crucial to obtain accurate results and comprehensive data ...
  • Analysis of a multiband monopole handset antenna combined with a slotted ground plane 

    Picher, C.; Anguera Pros, Jaume; Bujalance, A.; Andújar Linares, Aurora; Puente Baliarda, Carles (2013-01-01)
    Article
    Restricted access - publisher's policy
    The ground plane of a handset device plays an important role in the radiation process. As a consequence, through a ground plane modification, it is possible to obtain a multiband performance while keeping small antenna ...
  • Analysis of the human body on the radiation of FM handset antenna 

    Vergés, J.; Anguera, Jaume; Puente Baliarda, Carles; Aguilar, David (2009)
    Article
    Restricted access - publisher's policy
    A simple human body phantom model is proposed and used to demonstrate that the radiation efficiency of an internal handset antenna operating at the FM band can be improved for a particular holding position up to 10 dB. ...
  • Analysis of the specific absorption rate in handset antennas with slotted ground planes 

    Picher, Cristina; Anguera Pros, Jaume; Puente Baliarda, Carles; Kahng, Sungtek; Andújar Linares, Aurora (Institute of Electrical and Electronics Engineers (IEEE), 2010)
    Conference report
    Open Access
    The study of the interaction between human head and handset antennas should be taken into account since all the mobile phones have to guarantee a biological compatibility. This research analyzes several antennas with ...
  • 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 ...
  • Antena impresa de banda ancha 

    Pérez, Luis Andrés; Romeu Robert, Jordi (Unión Científica Internacional de Radio (URSI), 1990)
    Conference report
    Open Access
  • Antenas fractales microstrip impresas en esponjas metalizables 

    Anguera Pros, Jaume; Daniel, Jean Pierre; Borja, C.; Mumbru, Josep; Puente Baliarda, Carles; Picher, Cristina; Leduc, Tiphanie; Van Roy, Peter (Unión Científica Internacional de Radio (URSI), 2009)
    Conference report
    Open Access
    Radiating elements are usually made of metallic materials which increase the antenna complexity and weight. In order to solve this drawback, an antenna manufacture process using metallized foams is presented. A microstrip ...
  • Antenes de Grafè Fractal orientades a Network-on-Chip 

    Martinavarro Armengol, Àlex (Universitat Politècnica de Catalunya, 2018-02)
    Bachelor thesis
    Open Access
    Covenantee:  NanoNetworking Center in Catalunya
    This work treats in depth the possibility and restrictions of making antennas in order to communicate the cores of a massive multicore processor. Since these must be commensurable with the processor, we will perform ...
  • Antenna array configurations for massive MIMO outdoor base stations 

    Artiga Campos, Xavier; Perruisseau Carrier, Julien; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Massive MIMO predicts unprecedented capacity and energy efficiency improvements in future networks, by the use of base stations with hundreds of antennas. However the crucial question of determining suitable, or even ...
  • 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 microstrip miniatura y de alta directividad basada en el fractal de Sierpinski 

    Puente Baliarda, Carles; Borja Borau, M. Carmen; Anguera Pros, Jaume (Unión Científica Internacional de Radio (URSI), 2011)
    Conference report
    Restricted access - publisher's policy
    he unique geometrical properties of fractals have been proven to be useful to design advanced antennas. Enhanced performance in terms of size, gain or multifre- quency behaviour is observed in fractal-shaped antennas. Here, ...
  • Antenna microstrip triplebanda basada en el triangulo fractal de Sierpinski 

    Anguera Pros, Jaume; Martínez, Enrique; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (UPV, 2005)
    Conference report
    Open Access
  • Antenna subset selection for spatial modulation: a novel and energy efficient single RF technique 

    Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013)
    Conference report
    Restricted access - publisher's policy
    In this paper, we propose a closed-loop and single RF multiple-input-multiple-output (MIMO) method, particularly suitable for the Uplink of cellular systems, which is based on the low-complexity and recently devised method ...
  • Application of the conjugate gradient method to a self-matching network for industrial microwave heating antennas 

    Mallorquí Franquet, Jordi Joan; Aguasca Solé, Alberto; Cardama Aznar, Ángel; Pages, R; Haro, J M (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Conference report
    Open Access
    One of the main problems regarding the efficiency in a heating industrial system using high power microwaves is related with the uncontrolled changes on the load. These changes can be caused both by the different kinds of ...
  • A quad-band antenna for public safety applications 

    Mopidevi, Hema Swaroop; Damgaci, T; Rodrigo López, Daniel; Jofre Roca, Lluís; Cetiner, Bedri Artug (2014-01-01)
    Article
    Restricted access - publisher's policy
    The design, fabrication, and characterization of a frequency-reconfigurable antenna for the United States Public Safety (PS) wireless communication applications are presented. This antenna is quad-band operating in the PS ...