Now showing items 1-20 of 88

    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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  OpenAccess
      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 ...
    • 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 ...
    • Synthetic wind speed generation for the simulation of realistic diurnal cycles 

      D’Ambrosio, D.; Schoukens, Johan; Troyer, T. De; Zivanovic, Miroslav Upna Orcid; Runacres, Mark (IOP Publishing, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Synthetic wind-speed generators can provide a detailed characterisation of the wind variability at different time scales. A keen interest in the availability of synthetic wind speeds has recently risen in wind power modelling ...
    • A gap waveguide fed circular polarization antennas in the millimeter wave range 

      Pérez, Dayan Upna Orcid; Torres García, Alicia E. Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a novel circular polarization (CP) antennas in ridge gap waveguide (RGW) working in the V-band of the millimeter-wave spectrum is presented. CP is generated in a simple and effective way by means of two ...
    • Gaze estimation problem tackled through synthetic images 

      Garde Lecumberri, Gonzalo Upna; Larumbe Bergera, Andoni Upna Orcid; Bossavit, Benoît Upna Orcid; Cabeza Laguna, Rafael Upna Orcid; Porta Cuéllar, Sonia Upna Orcid; Villanueva Larre, Arantxa Upna Orcid (Association for Computing Machinery (ACM), 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, we evaluate a synthetic framework to be used in the field of gaze estimation employing deep learning techniques. The lack of sufficient annotated data could be overcome by the utilization of a synthetic ...
    • 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 ...
    • Active control for medium-frequency transformers flux-balancing in a novel three-phase topology for cascaded conversion structures 

      Lumbreras Magallón, David Upna Orcid; Barrios Rípodas, Ernesto Upna Orcid; Navarrete, Manuel; Balda Belzunegui, Julián; González Senosiain, Roberto Upna; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Efficiency and power density are important parameters in the design of power electronics converters. In many applications, low-frequency transformers are being substituted for medium-frequency and high-frequency transformers ...
    • Compact harmonic rejection filter for C-band high-power satellite applications 

      Teberio Berdún, Fernando Upna Orcid; Martín Iglesias, Petronilo; Arregui Padilla, Iván Upna Orcid; Arnedo Gil, Israel Upna Orcid; Lopetegui Beregaña, José María Upna Orcid; Gómez Laso, Miguel Ángel Upna Orcid (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A compact high-power low-pass filter for C-band broadband satellite applications is presented in this paper. The filter is composed of three different sections. A 9th-order compact high-power multi-ridge structure achieves ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...
    • 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 ...