Recent Submissions

  • A gap waveguide fed circular polarization antennas in the millimeter wave range 

    Pérez, Dayan; Torres-García, Alicia Upna; Ederra Urzainqui, Íñigo Upna; Beruete Díaz, Miguel Upna (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
    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 ...
  • Optical fiber vacuum sensor based on modal interferometer and PDMS coating 

    Ascorbe Muruzabal, Joaquín Upna; Fuentes Lorenzo, Omar Upna; Corres Sanz, Jesús María Upna; Arregui San Martín, Francisco Javier; Matías Maestro, Ignacio Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This work studies the behavior of polydimethylsiloxane (PDMS) as a transducer for optical vacuum pressure measurements. The optical structure chosen for this device is a modal interferometer achieved by splicing a coreless ...
  • Labyrinth absorber based on metageometries metasurface for fungi detection 

    Jáuregui López, Irati Upna; Rodríguez Ulibarri, Pablo Upna; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
    In this paper a labyrinth metasurface based in the new paradigm of metageometries is designed to operate in the Terahertz (THz) band as a biosensor. First, a numerical study is carried out to study the performance of the ...
  • New hexagonal CORPS-BFN for multibeam antenna applications 

    Biurrun Quel, Carlos Upna; Montesano, Antonio; Ederra Urzainqui, Íñigo Upna; Iriarte Galarregui, Juan Carlos Upna; Río Bocio, Carlos del Upna (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
    This work presents a new topology of a Coherently Radiating Periodic Structure - Beam Forming Network (CORPS-BFN) and its application for multibeam systems. A unit cell, consisting of a transition from a coaxial input to ...
  • Comparison of modified soret lenses for dual band integrated detectors 

    Torres-García, Alicia Upna; Pérez Escudero, José Manuel Upna; Gonzalo García, Ramón Upna; Ederra Urzainqui, Íñigo Upna (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
    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 ...
  • Development of energy management strategies for the sizing of a fast charging station for electric buses 

    Ojer Palacios, Iñaki; Berrueta Irigoyen, Alberto Upna; Pascual Miqueleiz, Julio María Upna; Sanchís Gúrpide, Pablo Upna; Ursúa Rubio, Alfredo Upna (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 ...
  • Initiative to increment the number of women in STEM degrees: women, science and technology chair of the Public University of Navarre 

    Aranguren Garacochea, Patricia Upna; San Martín Biurrun, Idoia Upna; Catalán Ros, Leyre Upna; Martínez Ramírez, Alicia Upna; Jurío Munárriz, Aránzazu Upna; Díaz Lucas, Silvia Upna; Pérez Artieda, Miren Gurutze Upna; Gómez Fernández, Marisol Upna; Barrenechea Tartas, Edurne Upna (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena
    The Public University of Navarre joined with Navarre Government has created the Women, Science and Technology Chair. This chair arises due to the plummeting tendency of the percentage of women in STEM degrees with the aim ...
  • Gaze estimation problem tackled through synthetic images 

    Garde Lecumberri, Gonzalo Upna; Larumbe Bergera, Andoni Upna; Bossavit, Benoît Upna; Cabeza Laguna, Rafael Upna; Porta Cuéllar, Sonia Upna; Villanueva Larre, Arantxa Upna (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 ...
  • 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; Marroyo Palomo, Luis Upna (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 ...
  • Investigation on the working point of slope-assisted dynamic Brillouin distributed fiber sensing 

    Feng, Cheng; Mariñelarena Ollacarizqueta, Jon Upna; Schneider, Thomas (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, an investigation on the working point of slope-assisted dynamic distributed Brillouin sensing is presented. A comparison has been carried out between the sensing performances achieved at the inflection point ...
  • 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 (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 ...
  • Low power CMOS chopper preamplifier based on source-degeneration transconductors 

    Cinco Izquierdo, O. J.; Sanz Pascual, M. T.; Cruz Blas, Carlos Aristóteles de la Upna; Calvo López, B. (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This paper describes the design of a low-power, low-noise flicker CMOS chopper preamplifier for sensor signal conditioning. The core amplifier and the Gm-C output low pass filter of the proposed fully differential preamplifier ...
  • A novel 0.3-0.31 THz GaAs-based transceiver with on-chip slotted metamaterial antenna based on SIW technology 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This paper presents a novel on-chip antenna with fully integrated 0.3-0.31 THz transceiver is implemented on 0.5μm GaAs substrate, and comprises a voltage-controlled oscillator (VCO), a buffer amplifier, a modulator stage, ...
  • U2Eyes: a binocular dataset for eye tracking and gaze estimation 

    Porta Cuéllar, Sonia Upna; Bossavit, Benoît Upna; Cabeza Laguna, Rafael Upna; Larumbe Bergera, Andoni Upna; Garde Lecumberri, Gonzalo Upna; Villanueva Larre, Arantxa Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    Theory shows that huge amount of labelled data are needed in order to achieve reliable classification/regression methods when using deep/machine learning techniques. However, in the eye tracking field, manual annotation ...
  • Overcome the limitations of performance parameters of on-chip antennas based on metasurface and coupled feeding approaches for applications in system-on-chip for THz integrated-circuits 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    This paper proposes a new solution to improve the performance parameters of on-chip antenna designs on standard CMOS silicon (Si.) technology. The proposed method is based on applying the metasurface technique and exciting ...
  • Automated reconfigurable antenna impedance for optimum power transfer 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; 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 ...
  • 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; Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna; Corres Sanz, Jesús María Upna; Matías Maestro, Ignacio Upna (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 ...
  • Hydrogen educational activities developed by APERNA: a renewable-energy student association 

    Berrueta Irigoyen, Alberto Upna; San Martín Biurrun, Idoia Upna; Samanes Pascual, Javier Upna; Pascual Miqueleiz, Julio María Upna; Barrios Rípodas, Ernesto Upna; Parra Laita, Íñigo de la Upna; Urtasun Erburu, Andoni Upna; Sanchis Gúrpide, Pablo Upna; Ursúa Rubio, Alfredo Upna (Asociación Española del Hidrógeno, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this paper, we present APERNA, a recently-created student association at Public University of Navarre (UPNA) with the aim of promotion of renewable energies.
  • DC capacitance reduction in three-phase photovoltaic inverters by using virtual impedance emulation 

    Urtasun Erburu, Andoni Upna; Sanchis Gúrpide, Pablo Upna; Marroyo Palomo, Luis Upna (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 ...
  • On the requirements of the power converter for second-life lithium-ion batteries 

    Berrueta Irigoyen, Alberto Upna; San Martín Biurrun, Idoia Upna; Pascual Miqueleiz, Julio María Upna; Sanchis Gúrpide, Pablo Upna; Ursúa Rubio, Alfredo Upna (IEEE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    The use of lithium-ion batteries is increasing year after year, especially in the automotive sector. Given the high requirements of electric vehicles, their energy storage systems are discarded when they still have around ...

View more