Now showing items 1-20 of 59

    • AC/DC millivoltage sensor by means of ITO-coated optical fibers: towards monitoring of biosignals 

      Aginaga Etxamendi, Concepción Isabel Upna; Socorro Leránoz, Abián Bentor Upna Orcid; Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This contribution shows the monitoring of AC and DC millivoltage signals by means of lossy mode resonances generated by Indium Tin Oxide (ITO) on optical fibers. Sensors were obtained by sputtering ITO thin-films onto 25 ...
    • Active damping based on the capacitor voltage positive-feedback for grid-connected power converters with LCL filter 

      Samanes Pascual, Javier Upna Orcid; Gubía Villabona, Eugenio Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The capacitor voltage positive-feedback is a widely extended active damping strategy. It can effectively damp the LCL output filter resonant poles for low ratios of resonance to sampling frequencies. However, the existing ...
    • Adjustment of the fuzzy logic controller parameters of the energy management strategy of a grid-tied domestic electro-thermal microgrid using the Cuckoo search algorithm 

      Arcos Avilés, Diego; García Gutiérrez, Gabriel; Guinjoan Gispert, Francesc; Pascual Miqueleiz, Julio María Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      During the last century, population growth, together with economic development, has considerably increased the energy demand and, although renewable energies are becoming an alternative, still total energy supply is mainly ...
    • Analysis of the main battery characterization techniques and experimental comparison of commercial 18650 Li-ion cells 

      Soto Cabria, Adrián Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Over the coming years, major growth in the use of Li-ion batteries is expected, both in electric mobility as well as in stationary applications, be it in self-consumption systems and micro grids or in large renewable power ...
    • Angle-susceptible sensing metasurface in terahertz regime 

      Nikolaev, Nazar A.; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna Orcid (EDP Sciences, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Nowadays thin-film coatings and structures are widely used in advanced industrial and scientific ap-plications that makes the tasks of thin-film sensing highly demanded in practice. Last decade, stimulated by progress in ...
    • Automated reconfigurable antenna impedance for optimum power transfer 

      Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper presents an approach to implement an automatically tuning antenna for optimising power transfer suitable for software defined radio (SDR). Automatic tuning is accomplished using a closed loop impedance tuning ...
    • Characterization and capacity dispersion of lithium-ion second-life batteries from electric vehicles 

      Braco Sola, Elisa Upna; San Martín Biurrun, Idoia Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Nowadays, electric vehicle batteries reutilization is considered such as a feasible alternative to recycling, as it allows to benefit from their remaining energy and to enlarge their lifetime. Stationary applications as ...
    • Characterization of 3D-printed choke horn antenna for 5G backhaul applications 

      Biurrun Quel, Carlos Upna Orcid; Lacombe, Elsa; Gianesello,Frederic; Luxe, Cyril; Río Bocio, Carlos del Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The 200 and 320 GHz frequency band constitutes an interesting window with approximately constant attenuation, which could potentially have applications in the area of ultrahigh-capacity wireless links. The user's demand ...
    • CMOS low-voltage indirect current feedback instrumentation amplifiers with improved performance 

      Carrillo, Juan M.; Domínguez, Miguel A.; Pérez Aloe, Raquel; Duque Carrillo, J. Francisco; Cruz Blas, Carlos Aristóteles de la Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Indirect current feedback (ICF) is a very common operation principle used in the design of CMOS instrumentation amplifiers (IA). The input and output transconductors required in an ICF IA usually consist on resistive-degenerated ...
    • Comparison of modified soret lenses for dual band integrated detectors 

      Torres García, Alicia E. Upna Orcid; Pérez Escudero, José Manuel Upna Orcid; Gonzalo García, Ramón Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper presents the comparison of different modified Soret lenses suitable for a millimeter and submillimeterwave dualband integrated pixel detectors. The approach is based on the modification of a printed planar Soret ...
    • Critical comparison of energy management algorithms for lithium-ion batteries in renewable power plants 

      Berrueta Irigoyen, Alberto Upna Orcid; Soto Cabria, Adrián Upna Orcid; García Solano, Miguel Upna Orcid; Parra Laita, Íñigo de la Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Lithium-ion batteries are gaining importance for a variety of applications due to their price decrease and characteristics improvement. A good energy management strategy is required in order to increase the profitability ...
    • DC capacitance reduction in three-phase photovoltaic inverters by using virtual impedance emulation 

      Urtasun Erburu, Andoni Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      DC voltage regulation in grid-connected three-phase PV inverters is a fundamental requirement. In order to reduce the influence of the PV non-linear behavior and ensure stability in the whole operating range, the input ...
    • Design of a groove gap waveguide to microstrip inline transition 

      Pérez Escudero, José Manuel Upna Orcid; Torres García, Alicia E. Upna Orcid; Gonzalo García, Ramón Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper the design of an inline transition between microstrip and groove gap waveguide operating at Wband is presented. The transition consists of two sections: a tapered microstrip line and a Chebyshev transformer. ...
    • Development of energy management strategies for the sizing of a fast charging station for electric buses 

      Ojer Palacios, Iñaki Upna; Berrueta Irigoyen, Alberto Upna Orcid; Pascual Miqueleiz, Julio María Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
      The electric vehicle contributes to reduce greenhouse gases emissions and get a greater integration of renewable energy. In this context, the implementation of urban buses implies the development of new grid infrastructures ...
    • Dual-mode soft-transition control for single-phase grid-connected photovoltaic inverters 

      Elizondo Martínez, David; Urtasun Erburu, Andoni Upna Orcid (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Single-phase grid-connected inverters for photovoltaic power generation have been strongly analysed for improvement. Dual-mode control for two-stage inverters makes it possible to improve the efficiency by alternating ...
    • Economic analysis of residential PV self-consumption systems with Li-ion batteries under different billing scenarios 

      Galilea Gil, Carlos Upna; Pascual Miqueleiz, Julio María Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena
      In this paper, an economic analysis for four houses with a PV self-consumption system with and without Li-ion batteries is carried out. In particular three different ways of sizing PV and batteries are analyzed under three ...
    • Effective analysis of secure web response time 

      López Romera, Carlos Upna; Morató Osés, Daniel Upna Orcid; Magaña Lizarrondo, Eduardo Upna Orcid; Izal Azcárate, Mikel Upna Orcid (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The measurement of response time in web based applications is a common task for the evaluation of service responsiveness and the detection of network or server problems. Traffic analysis is the most common strategy for ...
    • Folded Cascode OTA with 5540 MHzpF/mA FoM 

      Garde Luque, María Pilar Upna Orcid; López Martín, Antonio Upna Orcid; Carvajal, Ramón G.; Ramírez-Angulo, Jaime (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A micropower single-stage folded cascode amplifier able to drive a wide range of capacitive loads is presented. It features class AB operation and includes power-efficient adaptive biasing techniques, which provide enhanced ...
    • Fuzzy-based energy management of a residential electro-thermal microgrid based on power forecasting 

      Arcos Avilés, Diego; Gordillo, Rodolfo; Guinjoan Gispert, Francesc; Sanchis Gúrpide, Pablo Upna Orcid; Pascual Miqueleiz, Julio María Upna Orcid; Marietta, Martin P.; Marroyo Palomo, Luis Upna Orcid; Ibarra, Alexander (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, an energy management strategy based on microgrid power forecasting is applied to a residential grid-connected electro-thermal microgrid with the aim of smoothing the power profile exchanged with the grid. ...
    • Gamma radiation measurements using an optical fiber laser 

      Pérez Herrera, Rosa Ana Upna Orcid; Stancalie, Andrei; Cabezudo Sánchez-Valverde, Pablo Miguel; Sporea, Dan; Negut, Daniel; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A fiber ring laser cavity configuration was used to analyze the effect of gamma-irradiation over the performance of different types of erbium doped fibers. Preliminary results validates this method to monitor gamma-radiation ...