Now showing items 13-24 of 334

    • Antenna packaging for in-body applications 

      Romeu Robert, Jordi; González López, Giselle; Blanch Boris, Sebastián; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      A cylindrical mode expansion of the fields produced by an embedded antenna is used to determine the dimensions of the antenna packaging in order to minimize antenna impedance changes when the antenna is immersed in a varying ...
    • Study on beamforming V2I scenarios for sub-6 GHz and mmWave channels 

      Ballesteros Sánchez, Christian; Ramírez Arroyave, Germán Augusto; Montero Bayo, Luca; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      The study of the wireless channel between a hybrid massive MIMO Base Station (BS) and a vehicular platform is proposed. Several multi-antenna geometries and MIMO architectures in both vehicle and BS are numerically modeled ...
    • Design and characterization of non-planar 3D-printed passive UHF-RFID tag 

      Vidal Martínez, Neus; Salas Barenys, Arnau; Garcia Miquel, Aleix; Romeu Robert, Jordi; González López, Giselle; Jofre Roca, Lluís; López Villegas, José María (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      This paper presents the design and preliminary characterization of a novel 3D passive UHF-RFID tag. The prototype is fabricated using additive manufacturing techniques: 3D printing and copper electroplating. The design, ...
    • A 3D printed lens antenna for 5G applications 

      Ballesteros, Christian; Maestre, Marcos; Santos Blanco, M. Concepción; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Open Access
      A switchable multi-antenna architecture for lens-assisted beamsteering in the Ka-band region allocated for 5G communications (24-30 GHz) is proposed. The radiating elements are bow-tie antennas mounted with a 3D printed ...
    • Study of interconnecting switch currents in reconfigurable parasitic layer antennas 

      Ramirez, German; Araque, Javier; Ballesteros Sánchez, Christian; Blanch Boris, Sebastián; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (2019)
      Conference lecture
      Restricted access - publisher's policy
      This work presents an approach for calculating the currents across the switches of a reconfigurable parasitic layer intended to add beam-steering capabilities to a reference antenna. The method of analysis is based on the ...
    • Efficient and accurate electromagnetic scattering analysis of perfectly conducting thick plates 

      Úbeda Farré, Eduard; Sekulic, Ivan; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      The scattering analysis with the Electric-Field Integral Equation by the Method of Moments of perfectly conducting plates is normally carried out through the thin-plate approximation, which models the closed surface as an ...
    • Geometric algebra formulation of the Calderon Projector 

      López Menchón, Héctor; Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Heldring, Alexander (2019)
      Conference lecture
      Restricted access - publisher's policy
      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. ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • A model for photocurrent generation in photoconductive antennas 

      López Menchón, Héctor; Revuelta Martinez, Sergio; Santos Blanco, M. Concepción; Romeu Robert, Jordi; Rius Casals, Juan Manuel (2019)
      Conference lecture
      Restricted access - publisher's policy
      The laser-induced current carrier generation and transport under large biasing voltages in photoconductive materials located in electrode gap region of photoconductive antennas is a complex process involving many different ...
    • An architecture analysis for millimeter-wave optically steerable antenna array 

      Ballesteros Sánchez, Christian; Maestre, Marcos; Santos Blanco, M. Concepción; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      A lens-based integrated photodiode-antenna array for a Radio over Fiber (RoF) 5G wireless base station at millimeter-wave frequencies is proposed and analyzed. The elements of the array are based on slot bow-tie antennas ...
    • Electromagnetic monitoring of biological microorganisms 

      Zarrinkhat, Faezeh; Garrido, Alejandra; Jofre Roca, Lluís; Romeu Robert, Jordi; Rius Casals, Juan Manuel (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      The investigation of the electromagnetic properties of biological cells in the microwave frequencies may enable wireless monitoring of functional activity of microorganisms. Both theoretical and experimental methodologies ...
    • Imaging system for automotive radome characterization 

      Buitrago Ventura, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      In this paper, a setup to obtain an image of the attenuation and the reflectivity of an automotive radome in the 77 GHz band is presented.The characterization of the reflectivity is becoming an important issue to be ...