Recent Submissions

  • Accurate, grid-robust and versatile combined-field discretization for the electromagnetic scattering analysis of perfectly conducting targets 

    Úbeda Farré, Eduard; Sekulic, Ivan; Rius Casals, Juan Manuel; Heldring, Alexander (2020-04-15)
    Article
    Restricted access - publisher's policy
    Recent implementations of the Electric-Field Integral Equation (EFIE) for the electromagnetic scattering analysis of perfectly conducting targets rely on the electric current expansion with the monopolar-RWG basis functions, ...
  • Improving the accuracy of the adaptive cross approximation with a convergence criterion based on random sampling 

    Heldring, Alexander; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (2020-07-27)
    Article
    Open Access
    The accuracy of the Adaptive Cross Approximation (ACA) algorithm, a popular method for the compression of low rank matrix blocks in Method of Moment computations, is sometimes seriously compromised by unpredictable errors ...
  • Hybrid massive MIMO for urban V2I: Sub-6 GHz vs mmWave performance assessment 

    Pfadler, Andreas; Ballesteros Sánchez, Christian; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020-03)
    Article
    Open Access
    The relevance of vehicle communications in next-generation networks entails the necessity of studying their performance in the framework of upcoming massive architectures. In this regard, a study of the wireless channel ...
  • Nested fast adaptive cross approximation algorithm for solving electromagnetic scattering problems 

    Fang, Xiaoxing; Heldring, Alexander; Rius Casals, Juan Manuel; Chen, Xinlei; Cao, Qunsheng (IEEE Microwave Theory and Techniques Society, 2020-09-28)
    Article
    Open Access
    In this paper, a Nested Fast Adaptive Cross Approximation (NFACA) algorithm is presented to accelerate the solution of electromagnetic scattering problems. It is based on the Fast Adaptive Cross Approximation (FACA) and ...
  • Wireless sensing of concrete setting process 

    González López, Giselle; Romeu Robert, Jordi; Cairó, Ignasi; Segura Pérez, Ignacio; Ikumi Montserrat, Tai; Jofre Roca, Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-21)
    Article
    Open Access
    An RFID-based wireless system to measure the evolution of the setting process of cement-based materials is presented in this paper. The system consists of a wireless RFID temperature sensor that works embedded in concrete, ...
  • Terahertz frequency-scaled differential imaging for Sub-6 GHz vehicular antenna signature analysis 

    Solano-Sanchez, Jose-Antonio; Martinez-Ingles, Maria-Teresa; Molina García-Pardo, José María; Romeu Robert, Jordi; Jofre Roca, Lluís; Ballesteros Sánchez, Christian; Rodriguez, Jose-Victor; Mateo-Aroca, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-02)
    Article
    Open Access
    The next generation of connected and autonomous vehicles will be equipped with high numbers of antennas operating in a wide frequency range for communications and environment sensing. The study of 3D spatial angular responses ...
  • 3D-printed UHF-RFID tag for embedded applications 

    Vidal, Neus; Lopez-Villegas, Josep Maria; Romeu Robert, Jordi; Salas Barenys, Arnau; Garcia-Miquel, Aleix; González López, Giselle; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020-08-10)
    Article
    Open Access
    This paper presents the design, manufacture and characterization of a novel 3D passive UHF-RFID tag for embedded applications. The prototype is fabricated using additive manufacturing techniques: 3D printing and copper ...
  • 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 ...
  • Enhanced discretization of surface integral equations for resonant scattering analysis of sharp-edged plasmonic nanoparticles 

    Sekulic, Ivan; Tzarouchis, Dimitrios C.; Ylä-Oijala, Pasi; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (American Physical Society (APS), 2019-04-10)
    Article
    Open Access
    The surface integral equation (SIE) method, discretized with the method of moments, is a well-established methodology for the scattering analysis of subwavelength plasmonic nanoparticles. SIEs are usually discretized with ...
  • Linear and Circular UWB Millimeter-Wave and Terahertz Monostatic Near-Field Synthetic Aperture Imaging 

    solano perez, jose antonio; Martinez-Ingles, Maria-Teresa; Molina-Garcia Pardo, Jose Maria; Romeu Robert, Jordi; Jofre Roca, Lluís; Rodríguez, José Victor; Mateo-Aroca, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2020-03-10)
    Article
    Open Access
    Millimeter-wave and terahertz frequencies offer unique characteristics to simultaneously obtain good spatial resolution and penetrability. In this paper, a robust near-field monostatic focusing technique is presented and ...
  • Error vector magnitude, intermodulation and radiation characteristics of a bandwidth and pattern reconfigurable antenna 

    Towfiq, Asaduzzaman; Khalat, Abdurazag Mohamed; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís; Cetiner, Bedri Artug (2019-10)
    Article
    Open Access
    This letter presents the error vector magnitude (EVM), intermodulation (IM), and radiation performances of a reconfigurable antenna capable of varying its bandwidth between 3.4-3.6 and 3.1-3.9 GHz bands, and steering its ...
  • Debye frequency-extended waveguide permittivity extraction for high complex permittivity materials. Concrete setting process characterization 

    Gonzalez, Giselle; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2019-12)
    Article
    Open Access
    A waveguide with central frequency 868 MHz is used in transmission/reflection operation regime to accurately measure the behaviour of the complex permittivity of high complex permittivity granular materials and it has been ...

View more