Recent Submissions

  • Distributed opportunistic wireless mapping system towards smart city service provision 

    Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid; López Martín, Antonio Upna Orcid; Astrain Escola, José Javier Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    The knowledge of wireless signal distribution within an urban scenario can provide useful information to users as well as to enhance connectivity and device operation or to perform municipal logistics based on crowd density ...
  • Dual-mode soft-transition control for single-phase grid-connected photovoltaic inverters 

    Elizondo Martínez, David Upna Orcid; Urtasun Erburu, Andoni Upna Orcid (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 ...
  • The promising combination of thermoelectric generators with IoT technologies for autonomous monitoring systems 

    Garacochea Sáenz, Amaia; Catalán Ros, Leyre Upna Orcid; Casi Satrústegui, Álvaro Upna Orcid; Gubía Villabona, Eugenio Upna Orcid; Astrain Ulibarrena, David Upna Orcid (2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Monitoring stations becomes essential in any volcanic system in the world but, because of their remote location, both the electricity supply and the communications represent a technological challenge. The present work ...
  • Ramp-rate control in large PV plants: battery vs. short-term forecast 

    Marcos Álvarez, Javier Upna Orcid; Parra Laita, Íñigo de la Upna Orcid; Cires Buey, Eulalia; Wang, Guang Chao; García Solano, Miguel Upna Orcid; Marroyo Palomo, Luis Upna Orcid (2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The changeability in the power produced by utility-scale PV plants caused by shadows due to passing clouds can compromise grid stability. Traditionally, some kind of energy storage systems (ESS) is proposed as the solution ...
  • An IoT framework for SDN based city mobility 

    Al-Rahamneh, Anas; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Klaina, Hicham Upna; Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (Springer, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    The Internet of Things (IoT) is becoming more widespread, with global application in a wide range of commercial sectors, utilizing a variety of technologies for customized use in specific environments. The combinationof ...
  • THz tripod metasurfaces for sensing applications: from the basic, to more elaborated designs 

    Jáuregui López, Irati Upna Orcid; Orazbayev, Bakhtiyar Upna Orcid; Pacheco-Peña, Víctor Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    In this work, we propose, design, and evaluate three types of : three types of metasurfaces using tripod-shaped unit cells when working as thin-film sensing devices. The three meta-atoms of the proposed metasensors area ...
  • Design of a slotted Substrate Integrated waveguide antenna using a metasurface 

    Chocarro Álvarez, Javier; Pérez Escudero, José Manuel Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    In this paper, the use of a metasurface to improve the radiation properties of a Substrate Integrated Waveguide based slotted antenna is proposed. The design process of a metasurface covered 8 element slot antenna array ...
  • Compact bull's-eye antenna in ridge gap waveguide with circular polarization at 60 GHz 

    Pérez Quintana, Dayan Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena
    In this work, a Bull's-Eye (BE) antenna with circular polarization (CP) based on ridge gap waveguide (RGW) technology, working in the millimeter-wave band (60 GHz) is numerically and experimentally demonstrated. The structure ...
  • Compact antennas in ridge gap waveguide with circular polarization 

    Pérez Quintana, Dayan Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
    In this paper, two compact antennas in Ridge Gap Waveguide (RGW) technology, working at 60 GHz, with a high-purity circular polarization (CP) within a broad bandwidth are manufactured and measured. The antennas are fed ...
  • Modeling the inherent damping of high-power inverters 

    Erdocia Zabala, Ioseba Upna; Urtasun Erburu, Andoni Upna Orcid; Marroyo Palomo, Luis Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In order to decide whether passive or active damping is required in a three-phase inverter, a previous step is to assess the intrinsic damping of the system. However, few works focus on modeling this damping for DC/AC ...
  • Super-gain-boosted miller op-amp based on nested regulated cascode techniques with FoMAOLDC =24,614kV/V.MHz.pF/µWatt 

    Paul, Anindita; Ramírez-Angulo, Jaime; López Martín, Antonio Upna Orcid; González Carvajal, Ramón; Díaz Sánchez, Alejandro (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A simple technique to greatly enhance the DC open-loop gain of a Miller op-amp is introduced here. It is based on the utilization of nested regulated cascode amplifiers. It uses conventional Miller compensation and does ...
  • Lossy mode resonance enabling ultra-low detection limit for fibre-optic biosensors (INVITED) 

    Chiavaioli, Francesco; Giannetti, Ambra; Tombelli, Sara; Trono, Cosimo; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid; Baldini, Francesco (Springer, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The combination of optical fibre-based biosensors with nanotechnologies is providing the opportunity for the development of in situ, portable, lightweight, versatile and high-sensitivity optical sensing platforms. We report ...
  • Novel three-phase topology for cascaded multilevel medium-voltage conversion systems in large-scale PV plants 

    Lumbreras Magallón, David Upna Orcid; Barrios Rípodas, Ernesto Upna Orcid; Balda Belzunegui, Julián; González Senosiain, Roberto Upna; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Solar photovoltaic renewable energy systems are expanding in the power sector thanks to its increasingly competitive prices. Traditionally, large-scale PV plants have reduced their cost by increasing the power ratings of ...
  • Metal 3D printed D-Band waveguide to surface wave transition 

    Freer, Suzanna; Martinez, Rafael; Pérez Quintana, Dayan Upna Orcid; Beruete Díaz, Miguel Upna Orcid; Hanham, Stephen M.; Attallah, Moataz M.; Navarro Cía, Miguel Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The coupling efficiency between free space waves and surface waves is low, narrowband, or both. Highly efficient broadband (better than 20% fractional bandwidth) coupling from waveguide modes can be achieved through ...
  • Analytical modeling of high-frequency winding loss in round-wire toroidal inductors 

    Elizondo Martínez, David Upna Orcid; Barrios Rípodas, Ernesto Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Toroidal inductors are present in many different industrial applications, thus, still receive researchers' attention. AC winding loss in these inductors have become a major issue in the design process, since switching ...
  • Monitoring of electric buses within an urban smart city environment 

    Astrain Escola, José Javier Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid; López Martín, Antonio Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Villadangos Alonso, Jesús Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A practical experience on monitoring the data generated by electric buses is presented, focusing on energy consumption, charge and state of the batteries. The work is carried out in the framework of a global smart city ...
  • Supervised descent method (SDM) applied to accurate pupil detection in off-the-shelf eye tracking systems 

    Larumbe Bergera, Andoni Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (ACM, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The precise detection of pupil/iris center is key to estimate gaze accurately. This fact becomes specially challenging in low cost frameworks in which the algorithms employed for high performance systems fail. In the last ...
  • Improved strategies for HPE employing learning-by-synthesis approaches 

    Larumbe Bergera, Andoni Upna Orcid; Ariz Galilea, Mikel Upna; Bengoechea, José J.; Segura, Rubén; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (IEEE, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The first contribution of this paper is the presentation of a synthetic video database where the groundtruth of 2D facial landmarks and 3D head poses is available to be used for training and evaluating Head Pose Estimation ...
  • SeTA: semiautomatic tool for annotation of eye tracking images 

    Larumbe Bergera, Andoni Upna Orcid; Porta Cuéllar, Sonia Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (ACM, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Availability of large scale tagged datasets is a must in the field of deep learning applied to the eye tracking challenge. In this paper, the potential of Supervised-Descent-Method (SDM) as a semiautomatic labelling tool ...
  • Integration of second-life battery packs for self-consumption applications: analysis of a real experience 

    Soto Cabria, Adrián Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Zorrilla, Pablo; Iribarren Zabalegui, Álvaro Upna; Castillo, Diego H.; Wenceslao E., Rodríguez; Rodríguez, Adolfo J.; Vargas, David T.; Matías Maestro, Ignacio Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2021)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This contribution presents a methodology for the integration of Li-ion batteries discarded from electric vehicle into a collective self-consumption installation, showing the technical feasibility of such battery second ...

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