Listar Dpto. Ingeniería Eléctrica y Electrónica - Ingeniaritza Elektriko eta Elektronikoa Saila por título

Mostrando ítems 474-493 de 648

    • Photonic crystal fiber temperature sensor based on quantum dot nanocoatings 

      Larrión Zabaleta, Beatriz Upna; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Bravo Larrea, Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Hindawi / Wiley, 2009)   Artículo / Artikulua  OpenAccess
      Quantum dot nanocoatings have been deposited by means of the Layer-by-Layer technique on the inner holes of Photonic Crystal Fibers (PCFs) for the fabrication of temperature sensors. The optical properties of these sensors ...

    • Photonic crystal fibers for sensing applications 

      Rodrigues Pinto, Ana Margarida Upna; López-Amo Sáinz, Manuel Upna Orcid (Hindawi Publishing Corporation, 2012)   Artículo / Artikulua  OpenAccess
      Photonic crystal fibers are a kind of fiber optics that present a diversity of new and improved features beyond what conventional optical fibers can offer. Due to their unique geometric structure, photonic crystal fibers ...

    • Planar DNG superstrate for dipole antenna gain enhancement 

      Sáenz Sáinz, Elena Upna; Gonzalo García, Ramón Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Ikonen, Pekka; Tretyakov, Sergei A.; Maagt, Peter de (2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, a volumetric double-negative (DNG) superstrate based on grids of dipoles and wires for dipole antenna applications is proposed.

    • Planar holographic metasurfaces for terahertz focusing 

      Kuznetsov, Sergei A.; Astafev, Mikhail A.; Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid (Springer Nature, 2015)   Artículo / Artikulua  OpenAccess
      Scientists and laymen alike have always been fascinated by the ability of lenses and mirrors to control light. Now, with the advent of metamaterials and their two-dimensional counterpart metasurfaces, such components can ...

    • Planar magnetoinductive wave transducers: theory and applications 

      Freire, M. J.; Marqués, R.; Medina, Francisco; Gómez Laso, Miguel Ángel Upna Orcid; Martín, F. (AIP Publishing, 2004)   Artículo / Artikulua  OpenAccess
      Transduction of magnetoinductive waves (MIWs) in planar technology is demonstrated. A transducer consisting of a one-dimensional periodic array of metallic split squared ring resonators (SSRR), placed between a pair of ...

    • Planoconcave lens by negative refraction of stacked subwavelength hole arrays 

      Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Sorolla Ayza, Mario Upna; Campillo, Igor (Optical Society of America, 2008)   Artículo / Artikulua  OpenAccess
      This work presents the design of a planoconcave parabolic negative index metamaterial lens operating at millimeter wavelengths fabricated by using stacked subwavelength hole arrays. A staircase approximation to the ideal ...

    • Plasmonics and metamaterials at terahertz frequencies 

      Torres Landívar, Víctor Upna (2014)   Tesis doctoral / Doktoretza tesia  OpenAccess
      The research presented in this manuscript falls under the framework of metamaterials and plasmonics. It is mainly focused on applications at terahertz (THz) frequencies, a spectral band located between microwaves and ...

    • Polarization diversity for Brillouin distributed fiber sensors based on a double orthogonal pump 

      Urricelqui Polvorinos, Javier Upna Orcid; López Fernandino, Felipe; Sagüés García, Mikel Upna Orcid; Loayssa Lara, Alayn Upna Orcid (SPIE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We demonstrate a novel Brillouin optical time domain analysis sensor deploying a polarization diversity technique which eliminates the need for polarization scrambling, providing measurements that are largely immune to the ...

    • Polarization diversity scheme for BOTDA sensors based on a double orthogonal pump interaction 

      Urricelqui Polvorinos, Javier Upna Orcid; López Fernandino, Felipe; Sagüés García, Mikel Upna Orcid; Loayssa Lara, Alayn Upna Orcid (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      We introduce a Brillouin optical time domain analysis (BOTDA) sensor deploying a novel polarization diversity technique based on the use of two orthogonal pump pulses which simultaneously interact with a phase modulated ...

    • Polarization selection with stacked hole array metamaterial 

      Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Sorolla Ayza, Mario Upna; Campillo, Igor (AIP Publishing, 2008)   Artículo / Artikulua  OpenAccess
      Polarization rotation or selection appears in materials with optical activity, or those with Faraday effect, or in liquid crystals. In this letter we present a structure, with an analogous response, using stacked ...

    • Polarization-tunable negative or positive refraction in self-complementariness-based extraordinary transmission prism 

      Navarro Cía, Miguel Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid; Sorolla Ayza, Mario Upna (EMW Publishing, 2010)   Artículo / Artikulua  OpenAccess
      Here we report a prism made of stacked quasi-selfcomplementary extraordinary transmission surfaces which allows simultaneously left- and right-handed propagation within the V-band for vertical and horizontal polarizations, ...

    • Polarized left-handed extraordinary optical transmission of subterahertz waves 

      Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Sorolla Ayza, Mario Upna; Campillo, Igor (Optical Society of America, 2007)   Artículo / Artikulua  OpenAccess
      In this paper we design and measure a metamaterial polarizing device working in the sub-terahertz range. The polarizer is based on a modified version of our previous miniaturized Stacked Hole Array (SHA) structure, an ...

    • Polarized optical feedback from an extremely short external cavity for controlling and stabilizing the polarization of vertical cavity surface emitting lasers 

      Arizaleta Arteaga, Mikel Upna Orcid; Parriaux, Olivier; López-Amo Sáinz, Manuel Upna Orcid; Thienpont, Hugo; Panajotov, Krassimir (AIP Publishing, 2007)   Artículo / Artikulua  OpenAccess
      The authors present experimental results showing that polarization selective optical feedback from an extremely short external cavity induces switching between the two fundamental transverse modes with orthogonal linear ...

    • Polyaniline deposition on tilted fiber Bragg grating for pH sensing 

      López Aldaba, Aitor Upna; González Vila, Á.; Debliquy, M.; López-Amo Sáinz, Manuel Upna Orcid; Caucheteur, C.; Lahem, D. (SPIE, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we present the results of a new pH sensor based on a polyaniline (PAni) coating on the surface of a tilted fiber Bragg grating. The pH-sensitive PAni was deposited by in situ chemical oxidative polymerization. ...

    • Polypropylene-substrate-based SRR- and CSRR-metasurfaces for submillimeter waves 

      Aznabet, Mariem; Navarro Cía, Miguel Upna Orcid; Kuznetsov, Sergei A.; Gelfand, A. V.; Fedorinina, N. I.; Goncharov, Yu. G.; Beruete Díaz, Miguel Upna Orcid; El Mrabet, O.; Sorolla Ayza, Mario Upna (Optical Society of America, 2008)   Artículo / Artikulua  OpenAccess
      In this paper it is presented the fabrication of low loss millimeter wave metamaterials based on patterning on polypropylene substrates by conventional contact photolitography. We study numerically and experimentally ...

    • The potential integration of distributed generation in medium & low voltage grids: the applicability of power flow and hardware-in-the-loop tools for simulation and validation 

      Mentesidi, Konstantina (2014)   Tesis doctoral / Doktoretza tesia  OpenAccess
      The current thesis is dedicated to the penetration of DG technology into a MV/LV distribution network that may loosely represent an Island or autonomous power system since MV/LV levels are of high interest as most of ...

    • Power-efficient current-mode analog circuits for highly integrated ultra low power wireless transceivers 

      Esparza Alfaro, Fermín Upna (2014)   Tesis doctoral / Doktoretza tesia  OpenAccess
      In this thesis, current-mode low-voltage and low-power techniques have been applied to implement novel analog circuits for zero-IF receiver backend design, focusing on amplification, filtering and detection stages. The ...

    • Producing and exploiting simultaneously the forward and backward coupling in EBG-assisted microstrip coupled lines 

      Percaz Ciriza, Jon Mikel Upna Orcid; Chudzik, Magdalena Upna; Arnedo Gil, Israel Upna Orcid; Arregui Padilla, Iván Upna Orcid; Teberio Berdún, Fernando Upna Orcid; Gómez Laso, Miguel Ángel Upna Orcid; Lopetegui Beregaña, José María Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      In this paper, a methodology is proposed for the design of EBG-assisted coupled line structures in microstrip technology, controlling independently the forward and backward coupling. It is based on the use of a ...

    • PV power forecasting using a parametric model 

      Muñoz Escribano, Mikel Upna; Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Marcos Álvarez, Javier Upna Orcid (2015)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Nowadays, accurate AC power output forecast of PV plants can play a significant role for both the system operators and PV plant owners. The first group has to program the dispatch of the electric system and the second one ...

    • Pyridine vapors detection by an optical fibre sensor 

      Elosúa Aguado, César Upna Orcid; Bariáin Aisa, Cándido Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Rodríguez, Antonio; Colacio, Enrique; Salinas Castillo, Alfonso; Segura Carretero, Antonio; Fernández Gutiérrez, Alberto (MDPI, 2008)   Artículo / Artikulua  OpenAccess
      An optical fibre sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in colour from blue to pink-white in ...
      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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