Recent Submissions

  • Dispersion coding of ENZ media via multiple photonic dopants 

    Zhou, Ziheng; Li, Hao; Sun, Wangyu; He, Yijing; Liberal Olleta, Íñigo Upna Orcid; Engheta, Nader; Feng, Zhenghe; Li, Yue (2022)   Artículo / Artikulua  OpenAccess
    Epsilon-near-zero (ENZ) media are opening up exciting opportunities to observe exotic wave phenomena. In this work, we demonstrate that the ENZ medium comprising multiple dielectric photonic dopants would yield a comb-like ...
  • Direct observation of ideal electromagnetic fluids 

    Li, Hao; Zhou, Ziheng; Sun, Wangyu; Lobet, Michaël; Engheta, Nader; Liberal Olleta, Íñigo Upna Orcid; Li, Yue (Springer Nature, 2022)   Artículo / Artikulua  OpenAccess
    Near-zero-index (NZI) media have been theoretically identified as media where electromagnetic radiations behave like ideal electromagnetic fluids. Within NZI media, the electromagnetic power flow obeys equations similar ...
  • Gas detection using LMR-based optical fiber sensors 

    Dreyer, Julián José; Ozcariz Celaya, Aritz Upna Orcid; Ascorbe Muruzabal, Joaquín Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Vitoria Pascual, Ignacio Upna Orcid; Martelli, Cicero; Cardozo da Silva, Jean Carlos; Ruiz Zamarreño, Carlos Upna Orcid (MDPI, 2018)   Artículo / Artikulua  OpenAccess
    This work presents a first approach to the utilization of Lossy Mode Resonance (LMR) based optical fiber sensors for gas detection. The optical sensor is based on a SnO2 thin-film fabricated onto the core of cladding ...
  • Strain sensing based on resonant states in 2D dielectric photonic quasicrystals 

    Andueza Unanua, Ángel María Upna Orcid; Pérez Conde, Jesús Upna Orcid; Sevilla Moróder, Joaquín Upna Orcid (Optica, 2021)   Artículo / Artikulua  OpenAccess
    This paper reports the numerical and experimental study of the strain sensing effect of bidimensional quasiperiodic structures made with dielectric cylinders. Structures of around 100 cylinders arranged following a Penrose ...
  • A dual-wavelength fiber laser sensor with temperature and strain discrimination 

    Sánchez-González, Arturo; Pérez Herrera, Rosa Ana Upna Orcid; Roldán Varona, Pablo; Durán Escudero, Miguel; Rodríguez Cobo, Luis; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
    This work presents a dual-wavelength C-band erbium-doped fiber laser assisted by an artificial backscatter reflector. This fiber-based reflector, inscribed by femtosecond laser direct writing, was fabricated into a single ...
  • Design and on-field validation of an embedded system for monitoring second-life electric vehicle lithium-ion batteries 

    Castillo Martínez, Diego Hilario; Rodríguez Rodríguez, Adolfo Josué; Soto Cabria, Adrián Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Vargas Requena, Dávid Tomás; Matías Maestro, Ignacio Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid; Rodríguez Rodríguez, Wenceslao Eduardo (MDPI, 2022)   Artículo / Artikulua  OpenAccess
    In the last few years, the growing demand for electric vehicles (EVs) in the transportation sector has contributed to the increased use of electric rechargeable batteries. At present, lithium-ion (Li-ion) batteries are the ...
  • Impact of micro-cycles on the lifetime of lithium-ion batteries: an experimental study 

    Soto Cabria, Adrián Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Mateos Inza, Miren; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
    Experimental aging studies are commonly conducted on lithium-ion batteries by full charge and discharge cycles. However, such profiles may differ from the actual operation of batteries in electric vehicles and stationary ...
  • Enabling customizable services for multimodal smart mobility with city-platforms 

    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 Upna Orcid (IEEE, 2021)   Artículo / Artikulua  OpenAccess
    In the last decades, the cities' capacity for generating digital information has grown exponentially. In this context, the successful implementation of smart cities' concept depends on the current possibility of handling ...
  • Design and empirical validation of a LoRaWAN IoT Smart Irrigation System 

    Fraga Lamas, Paula; Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; López iturri, Peio Upna Orcid; Falcone Lanas, Francisco Upna Orcid; Fernández Caramés, Tiago M. (MDPI, 2020)   Artículo / Artikulua  OpenAccess
    In some parts of the world, climate change has led to periods of drought that require managing efficiently the scarce water and energy resources. This paper proposes an IoT smart irrigation system specifically designed for ...
  • Basketball player on-body biophysical and environmental parameter monitoring based on wireless sensor network integration 

    Picallo Guembe, Imanol Upna Orcid; López iturri, Peio Upna Orcid; Astrain Escola, José Javier Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Azpilicueta Fernández de las Heras, Leyre; Celaya-Echarri, Mikel; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Upna Orcid (IEEE, 2021)   Artículo / Artikulua  OpenAccess
    Sport activities have benefited in recent years from the progressive adoption of different technological assets in order to improve individual as well as group training, collect different statistics or enhance the spectator ...
  • In-field energy performance of solar PV module made of UMG silicon 

    Guerra, Moisés R.; Parra Laita, Íñigo de la Upna Orcid; García Solano, Miguel Upna Orcid; Pascual Miqueleiz, Julio María Upna Orcid (IEEE, 2022)   Artículo / Artikulua
    Upgraded metallurgical grade silicon (UMG-Si) PV modules have failed to make their space in the PV market, which was partly to the uncertainty on their in-field performance that brings the wide disparity of results published ...
  • Analysis of low power wide area network wireless technologies in smart agriculture for large-scale farm monitoring and tractor communications 

    Klaina, Hicham; Picallo Guembe, Imanol Upna Orcid; López Iturri, Peio Upna Orcid; Campo-Bescós, Miguel Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Aghzout, Otman; Vázquez Alejos, Ana; Falcone Lanas, Francisco Javier Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
    In this paper, the assessment of multiple scenario cases for large-scale farm monitoring using Low-Power Wide-Area Network (LPWAN) based near-ground sensor nodes with the interaction of both tractors and farmers are ...
  • Gamification for photonics students: labescape 

    Pérez Herrera, Rosa Ana Upna Orcid; Tainta Ausejo, Santiago Upna Orcid; Elosúa Aguado, César Upna Orcid (MDPI, 2021)   Artículo / Artikulua  OpenAccess
    The idea of utilizing game elements in non-gaming situations has sparked a lot of attention in recent years, especially in topics such as education and training. Game-based techniques appear to be an increasing trend in a ...
  • Lossy mode resonance based microfluidic platform developed on planar waveguide for biosensing applications 

    Benítez Pérez, Melanys; Zubiate Orzanco, Pablo Upna Orcid; Del Villar, Ignacio Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
    The development of resonance phenomena-based optical biosensors has gained relevance in recent years due to the excellent optical fiber properties and progress in the research on materials and techniques that allow resonance ...
  • AC coupled amplifier with a resistance multiplier technique for ultra-low frequency operation 

    Martincorena Arraiza, Maite Upna Orcid; Cruz Blas, Carlos Aristóteles de la Upna Orcid; Carlosena García, Alfonso Upna Orcid; López Martín, Antonio Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
    This paper proposes a novel, tunable AC coupled capacitive feedback amplifier, exhibiting an ultra-low high pass corner frequency. This is accomplished by actively boosting the output resistive value of a MOS transistor ...
  • A PV ramp-rate control strategy to extend battery lifespan using forecasting 

    González Moreno, Alejandro; Marcos Álvarez, Javier Upna Orcid; Parra Laita, Íñigo de la Upna Orcid; Marroyo Palomo, Luis Upna Orcid (Elsevier, 2022)   Artículo / Artikulua  OpenAccess
    This study analyses and presents a new ramp-rate control algorithm for smoothing PV power fluctuations, designed to address three fundamental objectives: to reduce battery cycling, to meet minimum storage requirements and ...
  • A frequency reconfigurable compact planar inverted-F antenna for portable devices 

    Ghaffar, Adnan; Altaf, Ahsan; Aneja, Aayush; Li, Xue Jun; Khan, Salahuddin; Alibakhshikenari, Mohammad; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (Hindawi, 2022)   Artículo / Artikulua  OpenAccess
    In this paper, a low-profile, compact size, inexpensive, and easily integrable frequency reconfigurable antenna system is proposed. The proposed antenna consists of an inverted-F shape antenna, capacitors, and switching ...
  • A compact CPW-fed ultra-wideband multi-input-multi-output (mimo) antenna for wireless communication networks 

    Ahmad, Sarosh; Khan, Shahid; Manzoor, Bilal; Soruri, Mohammad; Alibakhshikenari, Mohammad; Dalarsson, Mariana; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2022)   Artículo / Artikulua  OpenAccess
    In this article, a compact coplanar waveguide (CPW) technique based ultra-wideband multiple-input-multiple-output (MIMO) antenna is proposed. The design is characterized by a broad impedance bandwidth starting from 3 GHz ...
  • Electromagnetic characterization of uhf-rfid fixed reader in healthcare centers related to the personal and labor health 

    Ramos, Victoria; Suarez, Oscar javier; Febles Santana, Víctor M.; Suarez Rodriguez, David samuel; Aguirre Gallego, Erik Upna Orcid; Miguel-Bilbao, Silvia de; Marina, Pablo; Rabassa Lopez Calleja, Luis Enrique; Celaya Echarri, Mikel; Falcone Lanas, Francisco Javier Upna Orcid; Hernandez Armas, Jose Ángel (IEEE, 2022)   Artículo / Artikulua  OpenAccess
    Hospitals and healthcare centers are experiencing a remarkable implementation of new systems based on wireless communications technologies. Many of these systems provide location services and identification of materials, ...
  • Self-referenced optical fiber sensor based on LSPR generated by gold and silver nanoparticles embedded in layer-by-layer nanostructured coatings 

    Martínez Hernández, María Elena Upna Orcid; Goicoechea Fernández, Javier Upna Orcid; Rivero Fuente, Pedro J. Upna Orcid; Sandúa Fernández, Xabier; Arregui San Martín, Francisco Javier Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
    In this work, an optical fiber sensor based on the localized surface plasmon resonance (LSPR) phenomenon has been designed for the detection of two different chemical species (mercury and hydrogen peroxide) by using ...

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