Envíos recientes

  • La fotónica y el año internacional de la luz 

    López-Amo Sáinz, Manuel (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2015)   Otro / Bestelakoa
  • Simultaneous measurement of humidity and vibration based on a nanowire sensor system using Fast Fourier Transform technique 

    Rota Rodrigo, Sergio; López Aldaba, Aitor; Pérez Herrera, Rosa Ana; López Bautista, María del Carmen; Esteban, Óscar; López-Amo Sáinz, Manuel (IEEEOptical Society of America, 2016)   Artículo / Artikulua
    This paper presents a new sensor system for vibration and relative humidity measurements based on its interaction with the evanescent field of a microwire. The interrogation of the sensing head is carried out by monitoring ...
  • Análisis, diseño y control de convertidores multinivel 

    Burguete Archel, Eduardo (2016)   Tesis Doctoral / Doktoretza tesia
    Esta tesis doctoral se enmarca en el proyecto “Azimut: Energía Eólica Offshore 2020" cuyo objetivo es el desarrollo de nuevas estructuras de conversión que permitan alcanzar una mayor potencia y tensión para aplicaciones ...
  • Contribution to the development of Brillouin optical time-domain analysis sensors 

    Urricelqui Polvorinos, Javier (2016)   Tesis Doctoral / Doktoretza tesia
    This thesis dissertation concentrates on solving some of the limitations described by proposing novel techniques. The first technique is based on using a phase-modulated probe wave with self-heteroyne detection and RF ...
  • Metamaterials and plasmonics applied to devices based on periodic structures at high frequencies: microwaves, terahertz and optical range 

    Pacheco Peña, Víctor (2016)   Tesis Doctoral / Doktoretza tesia
    Esta tesis muestra el trabajo de investigación desarollado bajo el programa de doctorado “tecnología de las comunicaciones” de la Universidad Pública de Navarra (UPNA), para el grado de Doctor (PhD) en Ingenieria de ...
  • Design of low-cost smart accelerometers 

    Carlosena García, Alfonso; López Martín, Antonio; Massarotto, Marco; Cruz Blas, Carlos Aristóteles de la; Lecumberri Villamediana, Pablo; Gómez Fernández, Marisol; Pintor Borobia, Jesús María; Gárriz Sanz, Sergio (Universitat Politècnica de Catalunya, 2005)   Artículo / Artikulua
    The goal of this project is to design a low-cost smart accelerometer, making use of a piezoelectric element as basic sensing material, and adding a mixed-mode conditioning circuit.
  • Computation of greatest common divisor for the blind deconvolution of transient impulsive signals 

    Lecumberri Villamediana, Pablo; Gómez Fernández, Marisol; Carlosena García, Alfonso (Universitat Politècnica de Catalunya, 2005)   Congreso / Biltzarra
    We propose a new blind deconvolution method for transient impulsive signals in a single input – multiple output (SIMO) system. The method exploits the data redundancy inherent to SIMO multichannel systems to obtain an ...
  • Advanced metamaterials for high resolution focusing and invisibility cloaks 

    Orazbayev, Bakhtiyar (2016)   Tesis Doctoral / Doktoretza tesia
    Los metamateriales, descendientes de los dieléctricos artificiales, tienen parámetros electromagnéticos inusuales y proporcionan más posibilidades que los dieléctricos naturales para el control de la propagación de la luz. ...
  • A novel PLL architecture 

    Osa, Juan I.; Carlosena García, Alfonso; López Martín, Antonio (2000)   Congreso / Biltzarra
    A novel phase-locked loop scheme is proposed in this paper, whose main distinguishing features are infinite hold-in range, pull-out range fractionally constant and also a ripple fractionally constant. To this end, it ...
  • Multichannel blind deconvolution of impulsive signals 

    Lecumberri Villamediana, Pablo; Gómez Fernández, Marisol; Carlosena García, Alfonso (2005)   Congreso / Biltzarra
    In this communication, the problem of blind deconvolution of transient, impulsive signals in a multichannel environment is addressed. This kind of signals arise naturally, or are used as external excitation, in many ...
  • Two methods for nonparametric spectrum peak discrimination 

    Zivanovic, Miroslav; Carlosena García, Alfonso (2002)   Congreso / Biltzarra
    The conventional DFT-oriented nonparametric interpolation methods, based on time windowing and the DTFT envelope curve resampling (zero padding, Chirp-z [1], frequency scale distortion [2], etc.), can improve the spectrum ...
  • Analysis and synthesis of vibrato in lyric singers 

    Arroabarren Alemán, Ixone; Carlosena García, Alfonso (2002)   Congreso / Biltzarra
    In this paper two aspects of the vibrato signal characterisation are presented. First, an analysis method, which breaks down the musical signal into its different partials, and decomposes them into two separate ...
  • Unified analysis of glottal source spectrum 

    Arroabarren Alemán, Ixone; Zivanovic, Miroslav; Carlosena García, Alfonso (ISCA, 2003)   Congreso / Biltzarra
    The spectral study of the glottal excitation has traditionally been based on a single time-domain mathematical model of the signal, and the spectral dependence on its time domain parameters. Opposite to this approach, ...
  • Effect of the glottal source and the vocal tract on the partials amplitude of vibrato in male voices 

    Arroabarren Alemán, Ixone; Carlosena García, Alfonso (Acoustical Society of America, 2006)   Artículo / Artikulua
    In this paper the production of vocal vibrato is investigated. The most relevant features of the acoustical vibrato signal, frequency and amplitude variations of the partials, will be related to the voice production ...
  • Design of MOS-translinear multiplier/dividers in analog VLSI 

    López Martín, Antonio; Carlosena García, Alfonso (Hindawi Publishing Corporation, 2000)   Artículo / Artikulua
    A general framework for designing current-mode CMOS analog multiplier/divider circuits based on the cascade connection of a geometric-mean circuit and a squarer/ divider is presented. It is shown how both building blocks ...
  • Glottal spectrum based inverse filtering 

    Arroabarren Alemán, Ixone; Carlosena García, Alfonso (ISCA, 2003)   Congreso / Biltzarra
    In this paper a new inverse filtering technique for the time-domain estimation of the glottal excitation is presented. This approach uses the DAP modeling for the vocal tract characterization, and a spectral model for the ...
  • Real-time image acquisition system at W band with frequency scanning array antenna 

    Larumbe Gonzalo, Belén (2016)   Tesis Doctoral / Doktoretza tesia
    El objetivo principal de esta tesis ha sido el desarrollo de un sistema de adquisición de imagen en terahercios, de bajo coste, y enfocado a aplicaciones para la industria alimentaria. Para ello primero se llevó a cabo ...
  • Metasurface-based ultrathin carpet cloaks for millimeter waves 

    Orazbayev, Bakhtiyar; Mohammadi Estakhri, Nasim; Alù, Andrea; Beruete Díaz, Miguel (2017)   Artículo / Artikulua
    A metasurface carpet cloak for millimetre-wave range with polarization independent performance is experimentally demonstrated. It is shown that the cloak is able to mimic the ground plane by fully restoring the amplitude ...
  • 3D-printed 96 GHz bull’s-eye antenna with off-axis beaming 

    Beaskoetxea Gartzia, Unai; Maci, Stefano; Navarro Cía, Miguel; Beruete Díaz, Miguel (IEEE, 2017)   Artículo / Artikulua
    Reducing the profile, footprint and weight of antennas embarked on aircrafts, drones or satellites has been a long pursued objective. Here we tackle this issue by developing a millimeter-wave 96 GHz elliptical Bull’s-Eye ...
  • Diffusive-light invisibility cloak for transient illumination 

    Orazbayev, Bakhtiyar; Beruete Díaz, Miguel; Martínez, Alejandro; García Meca, Carlos (American Physical Society, 2016)   Artículo / Artikulua
    Invisibility in a diffusive-light-scattering medium has been recently demonstrated by employing a scattering-cancellation core-shell cloak. Unlike nondiffusive cloaks, such a device can be simultaneously macroscopic, ...