Browsing by Subject "Electromagnetism"

Now showing items 1-20 of 158

    • 60GHz material characterization and waveguide antenna array design 

      Papio Toda, Anna (Universitat Politècnica de Catalunya, 2009-01-08)
      Master thesis (pre-Bologna period)
      Open Access
      Cálculo de la permitividad compleja de materiales usados en PCB y diseño de una agrupación de antenas para la banda de 60GHz.

    • A comparison of analytical models for resonant inductive coupling wireless power transfer 

      Bou Balust, Elisenda; Alarcón Cot, Eduardo José; Gutiérrez Cabello, Jordi (The Electromagnetics Academy, 2012)
      Conference report
      Open Access
      Recent research in wireless power transfer (WPT) using resonant inductive coupling has demonstrated very high e±ciencies (above 40%) at large distances compared to the antenna dimensions, which has exponentially increased ...

    • A conceptual discussion on electromagnetic units - Extending mechanical units towards a global system of units 

      Jaen Herbera, Javier; Bohigas Janoher, Xavier; Pejuan Alcobé, Arcadi (2014-05)
      Article
      Restricted access - publisher's policy
      A comparative review of the different systems of units that are most usual in electromagnetism leads to the proposal of a new system of units. In this system, the gravitational constant acquires the role of an interaction ...

    • A GNU library for high order boudary integral equation methods in electromagnetism 

      Vico, Felipe (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Conference report
      Open Access
      In this talk we will present a GNU library made by The Simons Foundation, Inc (Leslie Greengard and Manas Racch), Michael O’Neil, Felipe Vico and others. The library can be downloaded from https://fastalgorithms.github.io/ ...

    • A hybrid modal-boundary element method for electromagnetic scattering from arbitrary conducting wedges 

      Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1990)
      Conference report
      Open Access
      A hybrid technique is used to determine the electromagnetic scattering contribution of arbitrary conducting wedges in electrically large objects. The boundary integral equation is discretized in a fictitious contour, and ...

    • A hydrodynamic model for particle beam-driven plasmon wakefield in carbon nanotubes 

      Martín-Luna, Pablo; Resta-López, Javier; Perera, Aravinda (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Conference report
      Open Access
      Charged particles moving through a carbon nanotube may be used to excite electromagnetic modes in the electron gas produced by π and σ orbitals in the cylindrical graphene shell that makes up a nanotube wall [1]. This ...

    • A new hybrid mode-matching method for the analysis of inductive obstacles and discontinuities 

      Boria Esbert, Vicente; Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Conference report
      Open Access
      A new and efficient hybrid mode-matching method for the analysis of arbitrarily shaped inductive obstacles and discontinuities is presented. An open-space spectral method is used to model the electrical behavior of the ...

    • A new strategy to design SIW-fed arrays 

      Gómez García, A.; Rubio, J.; Masa-Campos, J.L; Córcoles, J.; Campos-Roca, Y.; Gómez Alcalá, R. (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Conference report
      Open Access
      In this work, a new full-wave strategy, with very low iteration times, is proposed for the optimization and design of antenna arrays fed by substrate integrated waveguides. The device is decomposed into fixed and ...

    • A nodal-based finite element approximation of the Maxwell problem suitable for singular solutions 

      Badia, Santiago; Codina, Ramon (2009-11-17)
      Article
      Open Access
      A new mixed finite element approximation of Maxwell’s problem is proposed, its main features being that it is based on a novel augmented formulation of the continuous problem and the introduction of a mesh dependent ...

    • A Novel Type of Hybrid Reluctance Motor Drive 

      Andrada Gascón, Pedro; Blanqué Molina, Balduino; Martínez Piera, Eusebio; Torrent Burgués, Marcel (Institute of Electrical and Electronics Engineers (IEEE), 2014-08-01)
      Article
      Restricted access - publisher's policy
      In this paper, a novel type of hybrid reluctance motor (HRM) drive is presented. This new motor is characterized by a stator formed by a combination of independent magnetic structures, each one composed of an electromagnet, ...

    • A polarimetric ultra-wide band field scatterometer 

      Broquetas Ibars, Antoni; Fabregas Canovas, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 1995)
      Conference report
      Open Access
      “TERESA” (Terrestrial Radar Equipment for Scattering Analysis) is a ground-based, fully polarimetric scatterometer operative in the S, C, X, and Ku bands. It has been designed to obtain the complete backscattering matrix ...

    • A semi-analytical method for the design of coil-systems for homogeneous magnetostatic field generation 

      Azpúrua Auyanet, Marco Aurelio (2012)
      Article
      Restricted access - publisher's policy
      This paper proposes a simple semi-analytical method for designing coil-systems for homogeneous magnetostatic field generation. The homogeneity of the magnetic field and the average magnitude of the magnetic flux density ...

    • A Simple Closed-Loop Active Gate Voltage Driver for Controlling diC/dt and dvCE/dt in IGBTs 

      Ghorbani, Hamidreza; Sala Caselles, Vicenç; Paredes Camacho, Alejandro; Romeral Martínez, José Luis (2019-01-30)
      Article
      Open Access
      The increase of the switching speed in power semiconductors leads to converters with better efficiency and high power density. On the other hand, fast switching generates some consequences like overshoots and higher switching ...

    • 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
      Open Access
      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, ...

    • Adapted ACA algorithm with improved efficiency and compression rate 

      Heldring, Alexander; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (2015)
      Conference report
      Open Access
      This contribution proposes an adapted version of the popular Adaptive Cross Approximation algorithm for block wise compression of Method of Moments impedance matrices. The estimation of the matrix block ...

    • Additive manufacturing of mode converters in Ku and Q bands by selective laser sintering: experience and results 

      Montejo-Garai, José R.; González-Calvo, Miguel; Ruiz-Cruz, Jorge A.; Rebollar, Jesús (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
      Conference report
      Open Access
      In recent years, Additive Manufacturing (AM) has turned out as a disruptive technology [1]. Fast production, rapid prototyping or adaptability, are essential concepts in sectors such as automotive, aerospace, biotech, ...

    • Adjoint-based PDE-constrained optimization using HPC techniques 

      Peredo Andrade, Oscar Francisco (Universitat Politècnica de Catalunya, 2013-10-02)
      Master thesis
      Open Access
      This work focuses in the utilization of current HPC technologies to explore mathematical optimization algorithms in which a PDE acts as main constraint. A development framework is proposed, together with a novel application ...

    • ALBA synchrotron cooling system evaluation using flowmaster® 

      Quispe, Marcos; Escaler Puigoriol, Francesc Xavier; Prieto, Montserrat; Kjeldsen, Morten (2015-06-22)
      Article
      Open Access
      ALBA is a 3rd generation Synchrotron Light facility in Barcelona, Spain. Made up of a complex network of electron accelerators that produce synchrotron light, it allows for the visualization of the atomic structure of ...

    • An alternative method to quantify the electromagnetic immunity based on the Weibull distribution 

      Fernández García, Raúl; Gil Galí, Ignacio (2013)
      Article
      Open Access
      It is accepted that the electromagnetic interference should be addressed with statistical analysis. Usually the impact of electromagnetic interference on different electronic samples is evaluated and the average immunity ...

    • An analysis of the correlation between the fast variations in the total electron content of the ionosphere and the carrier phase fluctuations of radio signals from global navigation satellite systems 

      Sala i Marco, Roger (Universitat Politècnica de Catalunya, 2021-06-22)
      Master thesis
      Open Access
      onospheric scintillation consists on rapid fluctuations in the amplitude and phase of electromagnetic signals, which includes those of the Global Navigation Satellite System (GNSS), that can lead to cycle slips and even ...