Browsing by Subject "Electromagnetism"

Now showing items 1-20 of 122

    • 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 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 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 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, Barón 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 ...

    • 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 ...

    • 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 interpolation method to calibrate electromagnetic probes in semi-anechoic chambers 

      Tremola, Ciro; Azpúrua Auyanet, Barón Marco Aurelio; Páez, Eduardo Javier; Ormeño, D.; Rebolledo, A. (2012)
      Article
      Restricted access - publisher's policy
      Based upon the standard IEEE 1309, a new calibration method for electromagnetic (EM) probes is proposed. The aforementioned method compares the electric field strength measured with the EM probe subject to calibration with ...

    • 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 multireflector antenna clusters by spectral methods 

      Boria Esbert, Vicente; Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1994)
      Conference report
      Open Access
      This paper analyzes multireflector antennas making use of spectral domain techniques. The behaviour of the multireflector antenna is determined by means of a transference function that relates the plane wave spectrum of ...

    • Analysis of PIFA antenna coupling in nearby traces and reduction with CSRRs in PCB at 2.45 GHz 

      Gil Galí, Ignacio; Fernández García, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Open Access
      The electromagnetic coupling of a conventional planar inverted-F antenna (PIFA) antenna in the nearby layout traces is investigated in the 2.45 GHz industrial, scientific and medical radio band. The impact of a complementary ...

    • Analysis of pre-processing techniques when using validation methods in computational electromagnetic simulations 

      Jauregui Tellería, Ricardo; Ventosa Llopart, Oriol; Silva Martínez, Fernando; Kunze, Marco (2013-05)
      Article
      Restricted access - publisher's policy
      In computational electromagnetic simulations, most validation methods have been developed to quantify the similarity of two datasets, making them an objective tool for test engineers to discuss data on a similar basis. ...

    • Análisis de reflexiones múltiples entre superficies curvas mediante técnicas espectrales 

      Boria Esbert, Vicente; Ferrando Bataller, Miquel (1994)
      Conference report
      Open Access
      This paper analyzes the reflected fields produced by parabolic and hyperbolic surfaces when an electromagnetic field falls into them. Multireflector antennas, which are integrated by such reflecting surfaces, are studied ...