Listar Artículos de revista DIEE - IEES Aldizkari artikuluak por título

Mostrando ítems 287-306 de 391

    • Radio characterization for ISM 2.4 GHz wireless sensor networks for judo monitoring applications 

      López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2014)   Artículo / Artikulua  OpenAccess
      In this work, the characterization of the radio channel for ISM 2.4GHz Wireless Sensor Networks (WSNs) for judo applications is presented. The environments where judo activity is held are usually complex indoor scenarios ...

    • Random DFB fiber laser for remote (200 km) sensor monitoring using hybrid WDM/TDM 

      Leandro González, Daniel Upna Orcid; Miguel Soto, Verónica de Upna Orcid; Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      In this paper, a random distributed feedback fiber laser is proposed as a multiplexing scheme for ultralong range measurements (up to 200 km). Optical fiber sensors are time and wavelength multiplexed overcoming one of the ...

    • A ray launching-neural network approach for radio wave propagation analysis in complex indoor environments 

      Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Rawat, Meenakshi; Rawat, Karun; Ghannouchi, Fadhel; Falcone Lanas, Francisco Upna Orcid (IEEE, 2014)   Artículo / Artikulua  OpenAccess
      A novel deterministic approach to model the radio wave propagation channels in complex indoor environments reducing computational complexity is proposed. This technique combines a neural network and a 3D ray launching ...

    • Real-time FFT analysis for interferometric sensors multiplexing 

      Leandro González, Daniel Upna Orcid; Bravo Acha, Mikel Upna Orcid; Ortigosa Cayetano, Amaia; López-Amo Sáinz, Manuel Upna Orcid (IEEE / OSA, 2015)   Artículo / Artikulua  OpenAccess
      In this paper, a theoretical and experimental study of two interferometric sensor multiplexing schemes has been carried out by means of the fast Fourier transform (FFT) analysis. This work addresses one of the main drawbacks ...

    • Real-time imaging with frequency scanning array antenna for industrial inspection applications at W band 

      Larumbe Gonzalo, Belén Upna; Laviada, Jaime; Ibáñez Loinaz, Asier; Teniente Vallinas, Jorge Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
      A real-time imaging system based on a frequency scanning antenna for conveyor belt setups is presented in this paper. The frequency scanning antenna together with an inexpensive parabolic reflector operates at the W band ...

    • Real-time simulation technique of a microgrid model for DER penetration 

      Mentesidi, Konstantina; Rikos, Evangelos; Kleftakis, Vasilis; Kotsampopoulos, Panos; Aguado Alonso, Mónica Upna (EAI, 2014)   Artículo / Artikulua  OpenAccess
      Comprehensive analysis of Distributed Energy Resources (DER) integration requires tools that provide computational power and flexibility. In this context, throughout this paper PHIL simulations are performed to emulate the ...

    • Recent developments in fiber optics humidity sensors 

      Ascorbe Muruzabal, Joaquín Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      A wide range of applications such as health, human comfort, agriculture, food processing and storage, and electronic manufacturing, among others, require fast and accurate measurement of humidity. Sensors based on optical ...

    • Rectangular waveguide filters with meandered topology 

      Teberio Berdún, Fernando Upna Orcid; Percaz Ciriza, Jon Mikel Upna Orcid; Arregui Padilla, Iván Upna Orcid; Martín Iglesias, Petronilo; Lopetegui Beregaña, José María Upna Orcid; Gómez Laso, Miguel Ángel Upna Orcid; Arnedo Gil, Israel Upna Orcid (IEEE, 2018)   Artículo / Artikulua  OpenAccess
      In this paper, a new topology for rectangular waveguide bandpass and low-pass filters is presented. A simple, accurate, and robust design technique for these novel meandered waveguide filters is provided. The proposed ...

    • Refractometric sensors based on multimode interference in a thin-film coated singlemode– multimode–single-mode structure with reflection configuration 

      Del Villar, Ignacio Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Optical Society of America, 2014)   Artículo / Artikulua  OpenAccess
      Thin-film coated single-mode–multimode–single-mode (SMS) structures have been analyzed both theoretically and experimentally with the aim of detecting different refractive indices. By adequate selection of the thickness ...

    • Regular and anomalous extraordinary optical transmission at the THz-gap 

      Kuznetsov, Sergei A.; Navarro Cía, Miguel Upna Orcid; Kubarev, V. V.; Gelfand, A. V.; Beruete Díaz, Miguel Upna Orcid; Campillo, Igor; Sorolla Ayza, Mario Upna (Optical Society of America, 2009)   Artículo / Artikulua  OpenAccess
      In this paper Anomalous Extraordinary Transmission (ET) is reported for s-polarization of low loss doubly periodic subwavelength hole arrays patterned on polypropylene (PP) substrates by conventional contact photolithography ...

    • Remote (250 km) fiber Bragg grating multiplexing system 

      Fernández Vallejo, Montserrat Upna; Rota Rodrigo, Sergio Upna; López-Amo Sáinz, Manuel Upna Orcid (MDPI, 2011)   Artículo / Artikulua  OpenAccess
      We propose and demonstrate two ultra-long range fiber Bragg grating (FBG) sensor interrogation systems. In the first approach four FBGs are located 200 km from the monitoring station and a signal to noise ratio of 20 dB ...

    • Remote-time division multiplexing of bending sensors using a broadband light source 

      Bravo Acha, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Hindawi Publishing Corporation, 2012)   Artículo / Artikulua  OpenAccess
      This work experimentally demonstrates a remote sensing network which interrogates bending sensors using time-division multiplexing techniques and a broadband light source. The bending sensors are located 50 km away from ...

    • Resilient amplified double ring optical networks to multiplex optical fibre sensors 

      Fernández Vallejo, Montserrat Upna; Pérez Herrera, Rosa Ana Upna Orcid; Elosúa Aguado, César Upna Orcid; Díaz Lucas, Silvia Upna Orcid; Urquhart, Paul; Bariáin Aisa, Cándido Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (IEEE / OSA, 2009)   Artículo / Artikulua  OpenAccess
      We report the experimental demonstration of two configurations of an amplified optical fibre double ring network for the multiplexing of sensors. The networks are designed to be inherently resilient to fibre failures because ...

    • Resolution capabilities of future THz cameras 

      Lizarraga Cubillos, Juan Camilo Upna; Río Bocio, Carlos del Upna Orcid (Radioengineering Society, 2011)   Artículo / Artikulua  OpenAccess
      THz technology for developing imaging systems has recently aroused great interest, mainly due to the large number of applications in which these frequencies can be used: security, vision in hard environments, etc. In ...

    • Resonances in coated long period fiber gratings and cladding removed multimode optical fibers: a comparative study 

      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 (Optical Society of America, 2010)   Artículo / Artikulua  OpenAccess
      Two optical fiber devices have been coated in parallel: a long period fiber grating (LPFG) and a cladding-removed multimode optical fiber (CRMOF). The progressive coating of the LPFG by means of the layer-by-layer ...

    • Resonant quasi-periodic structure for rectangular waveguide technology with wide stopband and band-pass behavior 

      Arregui Padilla, Iván Upna Orcid; Teberio Berdún, Fernando Upna Orcid; Arnedo Gil, Israel Upna Orcid; Percaz Ciriza, Jon Mikel Upna Orcid; Gómez Torrent, Adrián Upna Orcid; Chudzik, Magdalena Upna; Gómez Laso, Miguel Ángel Upna Orcid; Lopetegui Beregaña, José María Upna Orcid (EMW Publishing, 2016)   Artículo / Artikulua  OpenAccess
      In this paper, a novel quasi-periodic structure for rectangular waveguide technology is proposed. The constituent unit cells of the structure feature a resonant behavior, providing high attenuation levels in the stopband ...

    • Response of complementary split ring resonators in composite stratified substrate integrated waveguide 

      Pérez Escudero, José Manuel Upna Orcid; Jarauta Ayensa, Eduardo Upna; Falcone Lanas, Francisco Javier Upna Orcid; Beruete Díaz, Miguel Upna Orcid (American Institute of Physics, 2017)   Artículo / Artikulua  OpenAccess
      In this work, the behavior of a Complementary Split Ring Resonator (CSRR) operating within the quasi-static resonance regime and embedded in a composite stratified Substrate Integrated Waveguide (SIW) with two different ...

    • Review on electromagnetic band gap technology and applications 

      Maagt, Peter de; Gonzalo García, Ramón Upna Orcid; Vardaxoglou, J. (URSI, 2004)   Artículo / Artikulua  OpenAccess
      This paper reviews the primary application areas of Electromagnetic BandGap (EBG) technology at microwave and (sub)millimetre wave frequencies. Examples of EBG configurations in the microwave region are shown and include ...

    • Robust fiber-optic sensor networks 

      Pérez Herrera, Rosa Ana Upna Orcid; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (Springer, 2012)   Artículo / Artikulua  OpenAccess
      The ability to operate despite failure will become increasingly important as the use of optical sensor networks grows, and the amount of sensing information to be handled by a sensor network is increasing, especially for ...

    • Role of external cavity reflectivity for achieving polarization control and stabilization of vertical cavity surface emitting laser 

      Arizaleta Arteaga, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid; Thienpont, Hugo; Panajotov, Krassimir (AIP Publishing, 2007)   Artículo / Artikulua  OpenAccess
      The authors present the experimental results showing how the external mirror reflectivity affects the polarization properties of a vertical cavity surface emitting laser subject to optical feedback from an extremely short ...
      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).
      Logo MinisterioLogo Fecyt

      Contacto | Sugerencias