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

Mostrando ítems 254-273 de 648

    • Frequency responses and synthesis methods for advanced microwave applications 

      Lujambio Genua, Aintzane Upna (2014)   Tesis doctoral / Doktoretza tesia  OpenAccess
      En esta tesis, se han propuesto unmétodo de aproximación basado en técnicas de diseño de filtros digitales y una técnica de síntesis directa basada en scattering inverso, para proporcionar flexibilidad al proceso de ...

    • Frequency selective properties of coaxial transmission lines loaded with combined artificial inclusions 

      Falcone Lanas, Francisco Javier Upna Orcid; Gil Guruceaga, Javier Upna (Hindawi, 2014)   Artículo / Artikulua  OpenAccess
      The properties of a modified coaxial transmission line by periodic inclusions will be discussed. The introduction of split ring resonators, conductor stubs, air gaps, and combination of these gives rise to new frequency ...

    • Frequency-based energy management strategy for stand-alone systems with distributed battery storage 

      Urtasun Erburu, Andoni Upna Orcid; Barrios Rípodas, Ernesto Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      Distributed generation is an attractive solution for stand-alone AC supply systems. In such systems, the installation of two or more energy-storage units is recommended for system redundancy and may also be required when ...

    • Fringe generation with non-uniformly coated long-period fiber gratings 

      Del Villar, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Cusano, Andrea; Paladino, Domenico; Cutolo, Antonello (Optical Society of America, 2007)   Artículo / Artikulua  OpenAccess
      In this work, the spectral characteristics of non-uniform symmetrically ring shaped coatings deposited on long-period fiber gratings (LPFGs) have been theoretically and experimentally investigated. To optimize the ...

    • From superhydrophilic to superhydrophobic surfaces by means of polymeric Layer-by-Layer films 

      López Torres, Diego Upna Orcid; Elosúa Aguado, César Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Elsevier, 2015)   Artículo / Artikulua

    • Frozen mode from hybridized extraordinary transmission and Fabry-Perot resonances 

      Beruete Díaz, Miguel Upna Orcid; Rodríguez Ulibarri, Pablo Upna Orcid; Pacheco-Peña, Víctor Upna Orcid; Navarro Cía, Miguel Upna Orcid; Serebryannikov, Andriy E. (American Physical Society, 2013)   Artículo / Artikulua  OpenAccess
      Frozen modes arising in stacked subwavelength hole arrays are studied in detail. Their origin is proved to be connected with the interaction between the extraordinary transmission resonance and the Fabry–Perot cavity mode. ...

    • Full three-dimensional isotropic transformation media 

      García Meca, Carlos; Ortuño Molinero, Rubén Upna; Martí, J.; Martínez, Alejandro (IOP Publishing, 2014)   Artículo / Artikulua  OpenAccess
      We present a method that enables the implementation of full three-dimensional (3D) transformation media with minimized anisotropy. It is based on a special kind of shape-preserving mapping and a subsequent optimization ...

    • Fully switchable multi-wavelength fiber lasers based on random distributed feedback for sensors interrogation 

      Bravo Acha, Mikel Upna Orcid; Miguel Soto, Verónica de Upna Orcid; Ortigosa Cayetano, Amaia; López-Amo Sáinz, Manuel Upna Orcid (IEEE / OSA, 2015)   Artículo / Artikulua  OpenAccess
      In this paper, the experimental study and characterization of a novel real-time switchable multi-wavelength fiber laser has been carried out. Two different gain materials, such as a 50 km SMF and a 2.5 km DCF fibers were ...

    • Gain dependence of measured spectra in coherent Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna Orcid; Urricelqui Polvorinos, Javier Upna Orcid; Loayssa Lara, Alayn Upna Orcid (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent detection. It is found that the large Brillouin gain that comes ...

    • Gain dependence of the phase-shift spectra measured in coherent Brillouin optical time-domain analysis sensors 

      Mariñelarena Ollacarizqueta, Jon Upna Orcid; Urricelqui Polvorinos, Javier Upna Orcid; Loayssa Lara, Alayn Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent self-heterodyne detection. These sensors are particularly ...

    • Gain improvement of dual band antenna based on complementary rectangular split-ring resonator 

      Ortiz Pérez de Eulate, Noelia Upna; Falcone Lanas, Francisco Javier Upna Orcid; Sorolla Ayza, Mario Upna (Hindawi / Wiley, 2012)   Artículo / Artikulua  OpenAccess
      A simple and successful dual band patch linear polarized rectangular antenna design is presented. The dual band antenna is designed etching a complementary rectangular split-ring resonator in the patch of a conventional ...

    • Gasohol quality control for real time applications by means of a multimode interference fiber sensor 

      Rodríguez Rodríguez, Adolfo Josué; Baldovino Pantaleón, Oscar; Cruz, René; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid; May Arrioja, Daniel A. (MDPI, 2014)   Artículo / Artikulua  OpenAccess
      In this work we demonstrate efficient quality control of a variety of gasoline and ethanol (gasohol) blends using a multimode interference (MMI) fiber sensor. The operational principle relies on the fact that the addition ...

    • Gaussian beam propagation versus Huygens method in non-paraxial conditions 

      Gonzalo García, Ramón Upna Orcid; Turullols, Pedro; Río Bocio, Carlos del Upna Orcid; Sorolla Ayza, Mario Upna (1997)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we present a study about the difference between Gaussian beam propagation and Huygens method to obtain the radiation pattern in the case of non-paraxial conditions. We fix a way to determine the error in the ...

    • Gaussian profiled horn antennas 

      Gonzalo García, Ramón Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Río Bocio, Carlos del Upna Orcid (1999)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In many different applications parameters such efficiency, gain, directivity, etc., are really critical. By using the Gaussian techniques presented here, the radiating features of existing horn antenna systems can be ...

    • Gaze estimation: a mathematical challenge 

      Sesma Sánchez, Laura Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
      El interés en los sistemas de eye tracking está creciendo significativamente en la actualidad. Aunque la tecnología de eye tracking puede parecer nueva, el estudio del movimiento del ojo ya empezó a principios del siglo ...

    • Generación del modo HE11 a partir de una guía circular lisa monomodo 

      Gonzalo García, Ramón Upna Orcid; Río Bocio, Carlos del Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Sorolla Ayza, Mario Upna (1996)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we present an original taper design to obtain the HE11 corrugated circular waveguide mode exciting with a pure TE11 monomode smooth circular waveguide mode. The proposed corrugated taper has a longitudinal ...

    • A general beam-forming network made with CORPS 

      Betancourt Quiñones, Diego Upna; Río Bocio, Carlos del Upna Orcid (2006)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A new beam-forming network concept is introduced. This network is based in the design principles of CORPS. The new proposed structure presents an improvement in design over the traditional beam-forming network since, ...

    • Generation of lossy mode resonances by deposition of high-refractive-index coatings on uncladded multimode optical fibers 

      Del Villar, Ignacio Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Sánchez Zábal, Pedro Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Fernández Valdivielso, Carlos Upna; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IOP Publishing Ltd, 2010)   Artículo / Artikulua  OpenAccess
      A comparative study of lossy mode resonances generated by depositing two different materials is presented. The two materials selected are indium tin oxide (ITO) and indium oxide. The two materials present different ...

    • Generation of lossy mode resonances with absorbing thin-films 

      Del Villar, Ignacio Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2010)   Artículo / Artikulua  OpenAccess
      The generation of lossy mode resonances with absorbing thin-films is analyzed with electromagnetic theory. The main differences with surface plasmon resonances are presented and some rules are given towards an optimum ...

    • Generation of selective fringes with cascaded long-period gratings 

      Del Villar, Ignacio Upna Orcid; Achaerandio, Miguel Upna; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2006)   Artículo / Artikulua  OpenAccess
      The inscription of cascaded long-period gratings of different periods in optical fiber permits us to obtain both narrowband and wideband filters in the same spectrum. If used as an optical transducer, it may permit us ...
      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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