Exploració per tema "Antennas"

Ara es mostren els items 1-20 de 42

    • 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 robust maximin approach for MIMO communications with imperfect channel state information based on convex optimization 

      Pascual Iserte, Antonio; Pérez Palomar, Daniel; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2006-01)
      Article
      Accés obert
      This paper considers a wireless communication system with multiple transmit and receive antennas, i.e., a multiple-input-multiple-output (MIMO) channel. The objective is to design the transmitter according to an imperfect ...

    • 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 ...

    • An improved interference alignment scheme for frequency selective channels 

      Shen, Minqi; Host-Madsen, Anders; Vidal Manzano, José (2008)
      Text en actes de congrés
      Accés obert
      In this paper, the achievable rate of a K-user interference channel with single antenna at individual node is studied. Interference alignment and zero forcing are applied at the transmitter and receiver, respectively. ...

    • Analysis of a plasmonic graphene antenna for microelectronic applications 

      Suessrneier, C.; Thiel, F.; Wigger, Anna K.; Bolívar, Peter Haring; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José; Cabellos Aparicio, Alberto; Banszcrus, L.; Stampfer, C.; Lemme, M. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Graphene offers a large potential to downscale antennas to the micrometer scale, due to its special dispersion relation and its ability to support plasmons in the THz frequency range. For an adequate performance of the ...

    • Analysis of reflector and horn antennas using multilevel fast multipole algorithm 

      Heldring, Alexander; Rius Casals, Juan Manuel; Parrón Granados, Josep; Cardama Aznar, Ángel; Ligthart, L P (CIMNE, 2000)
      Text en actes de congrés
      Accés obert
      The MultiLevel Fast Multipole Algorithm (MLFMA) has been implemented in a Method of Moments code for arbitrarily shaped metal surfaces discretized in Rao, Wilton and Glisson (RWG) basisfunctions. The accuracy of the ...

    • Assessment of mmwave handset arrays in the presence of the user body 

      Ballesteros Sánchez, Christian; Vähä-Savo, Lauri; Haneda, Katsuyuki; Icheln, Clemens; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
      Article
      Accés obert
      The emergence of mobile terminals operating at millimeter-wave frequencies necessitates the ability to evaluate the effect the environment, and in particular, users have on their radiation properties. Some studies evaluated ...

    • Characterization of a commercial radar to detect electric scooters 

      Febrer Mercadal, Adrià (Universitat Politècnica de Catalunya, 2020-06)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Design of a leaky-wave antenna based on Goubau line for imaging applications 

      Bock Filella, Roger (Universitat Politècnica de Catalunya, 2022-07-05)
      Treball Final de Grau
      Accés obert
      En ingeniería de antenas, uno de los aspectos más apreciados es la capacidad de apuntar el haz principal electrónicamente. Una de las técnicas más ampliamente usadas para conseguirlo es el escaneo mediante agrupaciones de ...

    • Development of a low-cost ground segment capable of receiving data from nanosatellites: a partnership between Brazil and Portugal 

      Santos, Júlio; Braga, João; Alves, Henrique; Silva, Jeremy; Resende, Daniel; Teixeira, André; Kakitani, Marcos (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      Two universities joined forces to develop a shared ground segment (Ground Stations and Mission Operation Centers) for satellite signals reception, capable of working together autonomously in a network to receive telemetry ...

    • Development of an automated environment for characterization and durability test of integrated antennas for automobiles 

      Soto Lamata, Irati (Universitat Politècnica de Catalunya, 2017-07)
      Projecte Final de Màster Oficial
      Accés obert
      During the last years, the automobile is transforming into a fully-communicated system, supporting all kind of communication types and standards (digital and analog radio, telephone, GPS and/or other positioning standards, ...

    • Electromagnetic characterization of 3D printed antennas employing conductive filament 

      Pous Solà, Marc; Azpúrua Auyanet, Marco Aurelio; Quílez Figuerola, Marcos; Mateu Mateus, Marc; Fernández Chimeno, Mireya; Silva Martínez, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This work presents the need to accurately define EM characterization of novel materials like the 3D conductive filament. Although these construction techniques and materials are currently used by the industry, the influence ...

    • Estudio y desarrollo de un sistema de captación de energía RF en redes WSN 

      Calvo Zavala, David (Universitat Politècnica de Catalunya, 2020-10-30)
      Treball Final de Grau
      Accés obert
      [CASTELLÀ] El objetivo de este proyecto es el estudio y desarrollo de un sistema de recolección de energía de radiofrecuencia, siendo capaz de rectificar esta energía eléctrica a corriente continua para poderla almacenar ...

    • Fabrication and measurement of homemade standard antennas 

      Guardiola Garcia, Marta; Monsalve Carcelen, Beatriz; Calafell Rueda, Irena; Roqueta Crusats, Gemma; Romeu Robert, Jordi (2012)
      Article
      Accés restringit per política de l'editorial
      Apprenticeship is linked to training. This paper is intended to be a tutorial on how to design, fabricate, and measure antennas in an economical and easy way, using recycled materials and common electronic devices such ...

    • Frequency extrapolation of IE-MEI linear system Coefficients in 2D 

      Rius Casals, Juan Manuel; Heldring, Alexander; Úbeda Farré, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The Integral Equation MEI (IE-MEI) method for the sparsification of Method of Moments linear system matrix is revisited here. It achieves cpu computation time and storage memory requirements of order O(N ) (for 2D perfectly ...

    • Geometric algebra formulation of the Calderon Projector 

      López Menchón, Héctor; Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Heldring, Alexander (2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Geometric Algebra provides a mathematical frame-work that allows to express many equations of physics in a more compact way [1]. It unifies the electric and the magnetic field in a single mathematical object: a multivector. ...

    • Graphene-enabled wireless communication for massive multicore architectures 

      Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José; Cabellos Aparicio, Alberto; Lemme, Max; Nemirovsky, Mario (2013-11-11)
      Article
      Accés restringit per política de l'editorial
      Current trends in microprocessor architecture design are leading towards a dramatic increase of core-level parallelization, wherein a given number of independent processors or cores are interconnected. Since the main ...

    • Grid-robust discretization of integral equations in the electromagnetic scattering analysis of homogeneous targets with geometric singularities 

      Úbeda Farré, Eduard; Sekulic, Ivan; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The conventional method-of-moment schemes of discretization for the scattering analysis of homogeneous targets, perfectly conducting or dielectric, rely on edge-based basis functions. This restricts the modelling of the ...

    • High impedance monopole antenna for indoor terahertz communication system 

      Yazgan, Ayhan; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this study, a wideband terahertz antenna for indoor wireless communication systems is proposed. Antenna has high input impedance which is reasonable for terahertz systems due to the high output impedance of terahertz ...

    • Impact of amplitude calibration errors on SMOS global images 

      Durán Martínez, Israel; Corbella Sanahuja, Ignasi; Torres Torres, Francisco; Duffo Ubeda, Núria; Oliva, Roger; Martín Neira, Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Some of the artifacts observed in SMOS brightness temperature images are originated in an inconsistency between correlation and antenna temperature calibration errors, which produces a multiplicative bias that scales with ...