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

Mostrando ítems 631-648 de 648

    • Vertically coupled microring resonators using one epitaxial growth step and single-side lithography 

      García López, Óscar; Thourhout, Dries Van; Lasaosa Medarde, Daniel Upna; López-Amo Sáinz, Manuel Upna Orcid; Baets, Roel; Galarza Galarza, Marko Upna Orcid (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
      A new concept for the fabrication of integrated microring resonators, requiring only one single epitaxial growth and two single-side lithographic steps, is proposed in what is the simplest fabrication scheme for vertical ...

    • Very short and efficient feeder design from monomode waveguide 

      Gonzalo García, Ramón Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Río Bocio, Carlos del Upna Orcid (IEEE, 1997)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we present an original and short corrugated horn antenna profile to obtain the HE11 corrugated circular waveguide mode exciting with a pure TE11 monomode smooth circular waveguide mode. We will obtain ...

    • Vibration detection using optical fiber sensors 

      Rodríguez García, Yoany; Corres Sanz, Jesús María Upna Orcid; Goicoechea Fernández, Javier Upna Orcid (Hindawi, 2010)   Artículo / Artikulua  OpenAccess
      Condition monitoring of heavy electromechanical equipment is commonly accomplished in the industry using vibration analysis. Several techniques, mainly based on capacitive and piezoelectric accelerometers, have been applied ...

    • Vibrato in singing voice: the link between source-filter and sinusoidal models 

      Carlosena García, Alfonso Upna Orcid; Arroabarren Alemán, Ixone Upna (Springer Open, 2004)   Artículo / Artikulua  OpenAccess
      The application of inverse filtering techniques for high-quality singing voice analysis/synthesis is discussed. In the context of source-filter models, inverse filtering provides a noninvasive method to extract the voice ...

    • Volatile organic compound optical fiber sensors: a review 

      Elosúa Aguado, César Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Bariáin Aisa, Cándido Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2006)   Artículo / Artikulua  OpenAccess
      Volatile organic compound (VOC) detection is a topic of growing interest with applications in diverse fields, ranging from environmental uses to the food or chemical industries. Optical fiber VOC sensors offering new and ...

    • Wavelength and phase detection based SMS fiber sensors optimized with etching and nanodeposition 

      Cardona-Maya, Yamile; Del Villar, Ignacio Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Botero-Cadavid, Juan F. (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      The development of an optical fiber refractometer by hydrogen fluoride etching and sputtering deposition of a thin-film of indium tin oxide on a single-mode-multimode-single-mode fiber structure has been analyzed with ...

    • WDM bi-directional transmission over 35 km amplified fiber-optic bus network using Raman amplification for optical sensors 

      Díaz Lucas, Silvia Upna Orcid; Lasheras, Gorka; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2005)   Artículo / Artikulua  OpenAccess
      We demonstrate a novel distributed fiber Raman amplified bus topology used for WDM transmission over 35 km of single-mode fiber by use of a multiwavelength Raman pump laser and eight Fiber Bragg gratings (FBGs). This ...

    • Wide angle terahertz sensing with a cross-dipole frequency selective surface 

      Rodríguez Ulibarri, Pablo Upna Orcid; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna Orcid (AIP Publishing, 2016)   Artículo / Artikulua  OpenAccess
      In this work, a terahertz sensor based on a cross dipole frequency selective surface is analyzed and experimentally tested. The sensing structure is optimized for operation at the fundamental band- stop resonance near ...

    • Wideband backscattering reduction at terahertz using compound reflection grating 

      Orazbayev, Bakhtiyar Upna Orcid; Rodríguez Ulibarri, Pablo Upna Orcid; Beruete Díaz, Miguel Upna Orcid (Optical Society of America, 2017)   Artículo / Artikulua  OpenAccess
      Backscattering reduction is usually achieved by using either absorbers or diffractions gratings at the expense of a narrow bandwidth. In this paper, we propose a different strategy based on a metallic compound reflection ...

    • Wideband channel modeling for mm-wave inside trains for 5G-related applications 

      Moreno García-Loygorri, Juan; Briso Rodríguez, César; Arnedo Gil, Israel Upna Orcid; Calvo, César; Gómez Laso, Miguel Ángel Upna Orcid; He, Danping; Jiménez, Florentino; González Posadas, Vicente (Hindawi / Wiley, 2018)   Artículo / Artikulua  OpenAccess
      Passenger trains and especially metro trains have been identified as one of the key scenarios for 5G deployments. The wireless channel inside a train car is reported in the frequency range between 26.5GHz and 40GHz. These ...

    • Wideband printed monopole antenna for application in wireless communication systems 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid (IET, 2018)   Artículo / Artikulua  OpenAccess
      Empirical results of an electrically small printed monopole antenna are described with a fractional bandwidth of 185% (115 MHz to 2.90 GHz) for return-loss better than 10 dB, peak gain and radiation efficiency at 1.45 GHz ...

    • Wideband unidirectional transmission with tunable sign-switchable refraction and deflection in nonsymmetric structures 

      Rodríguez Ulibarri, Pablo Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Serebryannikov, Andriy E. (American Physical Society, 2013)   Artículo / Artikulua  OpenAccess
      A general theory of reciprocal unidirectional transmission with tunable sign-switchable refraction and deflection of outgoing wave in structures with broken spatial inversion symmetry is presented. Several coupling scenarios ...

    • Wood zone plate fishnet metalens 

      Orazbayev, Bakhtiyar Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid (EDP Sciences, 2015)   Artículo / Artikulua  OpenAccess
      Fresnel-zone plate lenses provide focusing performance while having low profile. Unfortunately, they usually display higher reflection losses than conventional dielectric lenses. Here, we demonstrate a low-profile Wood ...

    • Zigbee radio channel analysis in a complex vehicular environment [wireless corner] 

      Rajo-Iglesias, Eva; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Gárate, Uxue; Falcone Lanas, Francisco Upna Orcid (IEEE, 2014)   Artículo / Artikulua  OpenAccess
      In this paper, the influence of topology and morphology of a particularly complex scenario for the deployment of ZigBee wireless sensor networks is analyzed. This complex scenario is a car. The existence of loss mechanisms ...

    • Zoned fishnet lens antenna with reference phase for side lobe reduction 

      Pacheco-Peña, Víctor Upna Orcid; Navarro Cía, Miguel Upna Orcid; Orazbayev, Bakhtiyar Upna Orcid; Minin, Igor V.; Minin, Oleg V.; Beruete Díaz, Miguel Upna Orcid (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      Reduction of first side lobe level and nulls in artificial fishnet metalenses is accomplished here by applying the reference phase concept along with the zoning technique. Higher focusing efficiency is achieved for a ...

    • Zoned near-zero refractive index fishnet lens antenna: steering millimeter waves 

      Pacheco-Peña, Víctor Upna Orcid; Orazbayev, Bakhtiyar Upna Orcid; Beaskoetxea Gartzia, Unai Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid (AIP Publishing, 2014)   Artículo / Artikulua  OpenAccess
      A zoned fishnet metamaterial lens is designed, fabricated, and experimentally demonstrated at millimeter wavelengths to work as a negative near-zero refractive index lens suitable for compact lens antenna configurations. ...

    • Zuntz optikoan oinarritutako sentsoreen prestazioen muga-efektu berria, egituren egoera monitorizatzea helburu 

      Iribas Pardo, Haritz Upna Orcid; Mariñelarena Ollacarizqueta, Jon Upna Orcid; Loayssa Lara, Alayn Upna Orcid (Udako Euskal Unibertsitatea, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Brillouin denbora-eremu optikoaren analisian (BOTDA) oinarritutako sentsoreak estruktura handien (120 km luzerako estrukturak) deformazioa eta tenperatura neurtzeko gaitasuna dute, metro bateko bereizmen espazialarekin. ...

    • ε-near-zero (ENZ) graded index quasi-optical devices: steering and splitting millimeter waves 

      Pacheco-Peña, Víctor Upna Orcid; Torres Landívar, Víctor Upna; Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Engheta, Nader (IOP Publishing, 2014)   Artículo / Artikulua  OpenAccess
      Graded index ε near-zero (GRIN-ENZ) quasi-optical components such as beam steerers and power splitters are designed, simulated and analyzed. The GRIN-ENZ medium is realized using stacked narrow hollow waveguides whose ...
      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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