Listar Artículos de revista DIEE - IEES Aldizkari artikuluak por título

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    • Small wind turbines sensorless MPPT: robustness analysis and lossless approach 

      Urtasun Erburu, Andoni Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2014)   Artículo / Artikulua  OpenAccess
      The configuration Permanent Magnet Synchronous Generator (PMSG) with diode bridge is frequently used in small Wind Energy Conversion Systems (WESC) thanks to its reliability and low cost. In order to perform a sensorless ...

    • SnO2-MOF-Fabry-Perot optical sensor for relative humidity measurements 

      López Aldaba, Aitor Upna; López Torres, Diego Upna Orcid; Elosúa Aguado, César Upna Orcid; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; Arregui San Martín, Francisco Javier Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Elsevier, 2018)   Artículo / Artikulua  OpenAccess
      In this paper, a new optical fiber sensor for relative humidity measurements is presented and characterized. The sensor is based on a SnO2 sputtering deposition on a microstructured optical fiber (MOF) low-finesse Fabry-Pérot ...

    • Soret fishnet metalens antenna 

      Orazbayev, Bakhtiyar Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Pacheco-Peña, Víctor Upna Orcid; Crespo López, Gonzalo Upna; Teniente Vallinas, Jorge Upna Orcid; Navarro Cía, Miguel Upna Orcid (Springer Nature, 2015)   Artículo / Artikulua  OpenAccess
      At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate refractive lenses without the need of large profiles. Unfortunately, they also present larger Fresnel reflection loss ...

    • Spatial characterization of radio propagation channel in urban vehicle-to-infrastructure environments to support WSNs deployment 

      Granda, Fausto; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Vargas Rosales, César; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      Vehicular ad hoc Networks (VANETs) enable vehicles to communicate with each other as well as with roadside units (RSUs). Although there is a significant research effort in radio channel modeling focused on vehicle-to-vehicle ...

    • Spectral evolution with incremental nanocoating of long period fiber gratings 

      Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Achaerandio, Miguel Upna; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optical Society of America, 2006)   Artículo / Artikulua  OpenAccess
      The incremental deposition of a thin overlay on the cladding of a long-period fiber grating (LPFG) induces important resonance wavelength shifts in the transmission spectrum. The phenomenon is proved theoretically with ...

    • Split ring resonator-based left-handed coplanar waveguide 

      Martín, F.; Bonache, J.; Falcone Lanas, Francisco Javier Upna Orcid; Sorolla Ayza, Mario Upna; Marqués, R. (AIP Publishing, 2003)   Artículo / Artikulua  OpenAccess
      In this letter, a planar left-handed propagating medium consisting of a coplanar waveguide (CPW) inductively coupled to split ring resonators (SRR) and periodically loaded with narrow metallic wires is proposed. The wires ...

    • Stability comparison of two ring resonator structures for multiwavelength fiber lasers using highly doped Er-fibers 

      Pérez Herrera, Rosa Ana Upna Orcid; Quintela, M. A.; Fernández Vallejo, Montserrat Upna; Quintela, Antonio; López-Amo Sáinz, Manuel Upna Orcid; López Higuera, José Miguel (IEEE / OSA, 2009)   Artículo / Artikulua  OpenAccess
      An experimental comparison of stability between two different fiber laser topologies is carried out. The lasers are based on ring resonators that include highly-doped Er-fibers. Both topologies use fiber Bragg grating ...

    • Stabilization of dual-wavelength erbium doped ring fiber lasers by single-mode operation 

      Quintela, M. A.; Pérez Herrera, Rosa Ana Upna Orcid; Canales, Irene; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2010)   Artículo / Artikulua  OpenAccess
      In this work, a novel single-longitudinal-mode (SLM) dual-wavelength laser configuration is proposed and demonstrated. This laser is based on ring resonators, and employs fiber Bragg gratings to select the operation ...

    • Stable multi-wavelength erbium fiber ring laser with optical feedback for remote sensing 

      Díaz Lucas, Silvia Upna Orcid; Leandro González, Daniel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (IEEE / OSA, 2015)   Artículo / Artikulua  OpenAccess
      In this work, we demonstrate a stable fiber sensing system for remote temperature measurements, where the sensing element is an array of four fiber Bragg gratings (FBGs) and sensor interrogation is achieved with a ...

    • State-of-charge-based droop control for stand-alone AC supply systems with distributed energy storage 

      Urtasun Erburu, Andoni Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Marroyo Palomo, Luis Upna Orcid (Elsevier, 2015)   Artículo / Artikulua  OpenAccess
      The droop method is an advantageous technique for stand-alone AC supply systems, allowing for power sharing among various inverters with no need for communication cables. However, in stand-alone systems with multiple ...

    • A stopband filter design using a 1-D non-periodic defected ground structure 

      Garde Irigoyen, Ieltxu Aitor Upna; Río Bocio, Carlos del Upna Orcid (Wiley, 2003)   Artículo / Artikulua  OpenAccess
      The one-dimensional (1-D) defected ground structure is used to control the cutoff frequency characteristic. In this paper three non-periodic filters are built, in order to show the versatility of the DGS. Five unit cells ...

    • Strategies for fabrication of hydrogen peroxide sensors based on electrostatic self-assembly (ESA) method 

      Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Echeverría Morrás, Jesús Upna Orcid; Claus, Richard O. (Elsevier, 2004)   Artículo / Artikulua  OpenAccess
      An optical fiber sensor has been fabricated for detection of 5 M–0.1mM concentrations of hydrogen peroxide with a linear response. The deposition method used is electrostatic self-assembly (ESA) of polymer cationic and ...

    • Strong lateral displacement in polarization anisotropic extraordinary transmission metamaterial 

      Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Sorolla Ayza, Mario Upna (IOP Publishing Ltd, 2010)   Artículo / Artikulua  OpenAccess
      In this paper, a deep numerical as well as experimental study of the anisotropy response of extraordinary transmission metamaterials constructed by stacking subwavelength hole arrays is presented. Two-dimensional (2D) ...

    • Study and optimization of self-assembled polymeric multilayer structures with neutral red for pH sensing applications 

      Goicoechea Fernández, Javier Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Hindawi / Wiley, 2008)   Artículo / Artikulua  OpenAccess
      The characterization of nanostructured thin films is critical in the design and fabrication of optical sensors. Particularly, this work is a detailed study of the properties of layer-by-layer electrostatic self-assembled ...

    • Study of optical fiber sensors for cryogenic temperature measurements 

      Miguel Soto, Verónica de Upna Orcid; Leandro González, Daniel Upna Orcid; López Aldaba, Aitor Upna; Beato López, Juan Jesús Upna Orcid; Pérez de Landazábal Berganzo, José Ignacio Upna Orcid; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      In this work, the performance of five different fiber optic sensors at cryogenic temperatures has been analyzed. A photonic crystal fiber Fabry-Pérot interferometer, two Sagnac interferometers, a commercial fiber Bragg ...

    • Superbackscattering antenna arrays 

      Liberal Olleta, Íñigo Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Gonzalo García, Ramón Upna Orcid; Ziolkowski, Richard W. (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      This article discusses the theory, design and practical implementation of superbackscattering antenna arrays. In analogy with Uzkov’s maximal directivity theorem, it is demonstrated that the maximal backscattering ...

    • Surface waves of finite size electromagnetic band gap woodpile structures 

      Ederra Urzainqui, Íñigo Upna Orcid; Iriarte Galarregui, Juan Carlos Upna Orcid; Gonzalo García, Ramón Upna Orcid (EMW Publishing, 2011)   Artículo / Artikulua  OpenAccess
      This paper studies the surface modes at the interface of finite size Electromagnetic Band Gap (EBG) woodpile structures. The impact of different types of woodpile terminations on the properties of these surface modes is ...

    • Suspended-core fiber Sagnac combined dual-random mirror Raman fiber laser 

      Rodrigues Pinto, Ana Margarida Upna; Bravo Acha, Mikel Upna Orcid; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid; Kobelke, J.; Schuster, K. (Optical Society of America, 2011)   Artículo / Artikulua  OpenAccess
      In the present work, a multiwavelength fiber laser based in the combination of a double-random mirror and a suspended-core Sagnac interferometer is presented. The double-random mirror acts by itself as a random laser, ...

    • Swept optical single sideband modulation for spectral measurement applications using stimulated Brillouin scattering 

      Sagüés García, Mikel Upna Orcid; Loayssa Lara, Alayn Upna Orcid (Optical Society of America, 2010)   Artículo / Artikulua  OpenAccess
      We propose a technique for the generation of broadband optical single sideband modulated signals. The technique is based on optically processing an optical double sideband signal using stimulated Brillouin scattering effect. ...

    • Switchable erbium doped fiber ring laser system for temperature sensors multiplexing 

      Rota Rodrigo, Sergio Upna; Rodríguez Cobo, Luis; Quintela, M. A.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2013)   Artículo / Artikulua  OpenAccess
      In this paper a proof of concept of a switchable erbium doped fiber ring laser (EDFRL) system, demonstrated for temperature sensors multiplexing, was carried out showing a high linearity and a sensitivity of 1.55 GHz/°C. ...
      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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