Ara es mostren els items 21-40 de 401

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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
      Accés obert
      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 ...
    • A new class of antenna array with a reconfigurable element factor 

      Li, Zhouyuan; Rodrigo López, Daniel; Jofre Roca, Lluís; Cetiner, Bedri Artug (2013-04)
      Article
      Accés restringit per política de l'editorial
      A parasitic layer-based multifunctional reconfigurable antenna array (MRAA) formed by the linear combination of four (4 1) identical multifunctional reconfigurable antenna (MRA) elements is presented. Each MRA produces ...
    • A novel approach to MISO interference networks under maximum receive-power regulation 

      Pérez Neira, Ana Isabel; Vázquez Oliver, Miguel Ángel; Lagunas Hernandez, Miguel A. (WSEAS Press, 2018-07-01)
      Article
      Accés obert
      An aggressive frequency reuse is expected within the next years in order to increase the spectral ef¿ciency. Multiuser interference by all in-band transmitters can create a communication bottleneck and, therefore, it is ...
    • A novel compact UHF wideband antenna for near field electrical characterization of Steel Fiber Reinforced Concrete 

      Roqueta Crusats, Gemma; Irteza, I; Romeu Robert, Jordi; Jofre Roca, Lluís (IEEE Computer Society Publications, 2009)
      Text en actes de congrés
      Accés obert
      A novel, electrically small, UHF (350 MHz–750 MHz)microstrip slot antenna is presented. The antenna is designed for the characterization of Steel Fiber Reinforced Concrete (SFRC) segments. The antenna consists on a three ...
    • A novel ultra-wide band wearable antenna under different bending conditions for electronic-textile applications 

      El Gharbi, Mariam; Martínez Estrada, Marc; Fernández García, Raúl; Ahyoud, Saida; Gil Galí, Ignacio (2020-05-05)
      Article
      Accés obert
      This paper is devoted to a novel textile ultra-wideband (UWB) antenna for wearable applications. The antenna is designed and implemented on a felt textile substrate with attractive features such as a flexible full embroidered ...
    • A procedure to design wide-band electromagnetically-coupled stacked microstrip antennas based on a simple network model 

      Anguera Pros, Jaume; Puente Baliarda, Carles; Borja, C. (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      It is well known that microstrip patch antennas have a poor bandwidth due to the small spacing between the patch and the ground plane. A stacked patch configuration has been demonstrated experimentally as a feasible solution, ...
    • 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
      Accés restringit per política de l'editorial
      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 ...
    • A reconfigurable antenna with beam steering and beamwidth variability for wireless communications 

      Towfiq, Asaduzzaman; Bahceci, Israfil; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís; Cetiner, Bedri Artug (2018-07-12)
      Article
      Accés obert
      A reconfigurable antenna (RA) capable of steering its beam into the hemisphere corresponding to ¿ ¿ {-40°,0°,40°}, Ø ¿ {0°,45°,90°,-45°}, and of changing 3-dB beamwidth, where ¿3dB ¿ (40°,100°), Ø ¿ {45°,90°,-45°} for ...
    • A recursive acceleration technique for static potential Green's functions of a rectangular cavity combining image and modal series 

      Tamayo Palau, José María; López-Peña, Sergio; Mattes, Michael; Heldring, Alexander; Rius Casals, Juan Manuel; Mosig, Juan Ramón (2011-03)
      Article
      Accés restringit per política de l'editorial
      A hybrid acceleration algorithm for the computation of the static potential Green’s functions of a rectangular cavity is proposed. Similarly to Ewald’s method, it combines the series expansions in terms of images and modes. ...
    • A review on the effects of thermal inversions and electromagnetic fields on cell cultures and wireless communications 

      López Álvarez, Cibrán; López Martín, María Elena; Rodríguez González, Juan Antonio; Ares Pena, Francisco José (2023-12-01)
      Article
      Accés obert
      Thermal inversions, typical in the winter season, consist of cold air at the Earth’s surface being trapped under a layer of warmer air. Such an effect keeps normal convective overturning of the atmosphere from penetrating ...
    • A simple and effective microwave invisibility cloak based on frequency selective surfaces 

      Yuste, Pedro; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Blanch Boris, Sebastián; Heldring, Alexander; Úbeda Farré, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés obert
      This paper presents the design, simulation, manufacturing and testing of a simple invisibility cloak based on a frequency selective surface (FSS). The work is focused on cloaking an electrically thin dielectric cylinder ...
    • A single antenna ambient noise cancellation method for in-situ radiated EMI measurements in the time-domain 

      Azpúrua Auyanet, Marco Aurelio; Pous Solà, Marc; Silva Martínez, Fernando (2016)
      Text en actes de congrés
      Accés obert
      This paper presents a single antenna ambient noise cancellation method for in-situ radiated emissions measurements performed using an entirely time-domain approach and the sliding window Empirical Mode Decomposition. The ...
    • A submillimeter wave parabolic reflector by additive manufacturing 

      Romeu Robert, Jordi; Aguasca Solé, Alberto; Blanch Boris, Sebastián; O'Callaghan Castellà, Juan Manuel; Jofre Roca, Lluís; Buitrago Ventura, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The manufacturing of prototype of an offset parabolic reflector to operate at 120 GHz is presented. The paper describes the different metallization options to achieve a good performance.
    • 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
      Accés restringit per política de l'editorial
      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 ...
    • Accelerated direct solution of the MoM linear system using block compression and nested factorization 

      Heldring, Alexander; Rius Casals, Juan Manuel (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A comparison is presented between different algorithms for direct (non-iterative) accelerated solution of the Method of Moments. The alternatives are common block LU factorization and Compressed Block Decomposition (CBD), ...
    • 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)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   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 ...
    • 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
      Accés obert
      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 ...
    • 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)
      Text en actes de congrés
      Accés obert
      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 ...
    • Alineament d'interferències, gestió d'interferències i diversitat de polarització 

      Gurrera Edo, Aniol (Universitat Politècnica de Catalunya, 2015-03-19)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This project deals with the interference management in multiuser environments through the K-User MxN MIMO Interference Channel (IC)