Now showing items 1-20 of 126

    • 100 GHz retina for THz tomographic imaging 

      Alonso, Maria; Guerra, C.; Nova, Enrique; Abril, Jordi; Romeu Robert, Jordi; Llombart, Nuria; Jofre Roca, Lluís (2011)
      Conference report
      Restricted access - publisher's policy
      In a tomographic imaging system, the key is to collect a sufficient number of scattered field points to recover the currents in the inverse scattering problem. This can be accomplished by using a real array of multiplexed ...
    • 3D beamsteering low complexity reconfigurable multilevel antenna 

      Zhou, Ivan; Ramirez, German; Montero, Luca; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2020-04)
      Article
      Open Access
      A low-complexity reconfigurable antenna (RA) capable of steering its beam into nine different directions corresponding to ¿={-42°,0°,42°} in the ¿={25°,0°,155°} planes, and ¿=±25° in the ¿=90° plane, using a reduced number ...
    • 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 ...
    • 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 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
      Restricted access - publisher's policy
      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 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 ...
    • 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)
      Conference lecture
      Open Access
      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 ...
    • 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 ...
    • 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 ...
    • 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 a multiband monopole handset antenna combined with a slotted ground plane. 

      Picher, Cristina; Anguera Pros, Jaume; Bujalance Jurado, Adrián; Andújar Linares, Aurora; Puente Baliarda, Carles (2013-01-01)
      Article
      Restricted access - publisher's policy
      The ground plane of a handset device plays an importants role in radiations process. As a consequence, thorugh a ground plane modification, it is possible to obtain a multiband performance while keeping small antenna dimensions.
    • 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 ...
    • 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 ...
    • 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 ...