Recent Submissions

  • Telecommunications on Earth and their possible relation with the anthropic principle 

    del Villar, Ignacio Upna (Nicolaus Copernicus University, 2019)   Artículo / Artikulua  OpenAccess
    The society of the information is based on the ability of humans to communicate in real time. This is possible thanks to the emission of electromagnetic waves. In this work it is discussed, by analyzing the round trip time ...
  • Super-wide impedance bandwidth planar antenna for microwave and millimeter-wave applications 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna; Limiti, Ernesto (MDPI, 2019)   Artículo / Artikulua  OpenAccess
    A feasibility study of a novel configuration for a super-wide impedance planar antenna is presented based on a 2 × 2 microstrip patch antenna (MPA) using CST Microwave Studio. The antenna comprises a symmetrical arrangement ...
  • Layer-by-layer nano-assembly: a powerful tool for optical fiber sensing applications 

    Rivero Fuente, Pedro Upna; Goicoechea Fernández, Javier Upna; Arregui San Martín, Francisco Javier Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
    The ability to tune the composition of nanostructured thin films is a hot topic for the design of functional coatings with advanced properties for sensing applications. The control of the structure at the nanoscale level ...
  • Intelligent control of wind-assisted PHEVs smart charging station 

    Hassan, Syed Zulqadar; Kamal, Tariq; Riaz, Muhammad Hussnain; Shah, Syed Aamir Hussain; Ali, Hina Gohar; Riaz, Muhammad Tanveer; Sarmad, Muhammad; Zahoor, Amir; Khan, Muhammad Abbas; Pascual Miqueleiz, Julio María Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
    Two technology opportunities, integration of renewable energy sources and the electrification of vehicles are being encouraged to reduce dependency on fossil fuels and pollution problems. Nevertheless, the huge increase ...
  • Fluorescent sensors for the detection of heavy metal ions in aqueous media 

    Acha Morrás, Nerea de Upna; Elosúa Aguado, César Upna; Corres Sanz, Jesús María Upna; Arregui San Martín, Francisco Javier Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
    Due to the risks that water contamination implies for human health and environmental protection, monitoring the quality of water is a major concern of the present era. Therefore, in recent years several efforts have been ...
  • Evaluation of the electromyography test for the analysis of the aerobic-anaerobic transition in elite cyclists during incremental exercise 

    Latasa Zudaire, Iban Alexander; Córdova Martínez, Alfredo; Quintana Ortí, Gregorio; Lavilla Oiz, Ana; Navallas Irujo, Javier Upna; Rodríguez Falces, Javier Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
    (1) Background: The aim of this study was to investigate the validity and reliability of surface electromyography (EMG) for automatic detection of the aerobic and anaerobic thresholds during an incremental continuous cycling ...
  • Diseño, desarrollo y evaluación preliminar de un novedoso monitor de signos vitales llevable para vacunos 

    Quispe Bonilla, Max David; Poma Gutiérrez, Adolfo; Serrano Arriezu, Luis Javier Upna; Led Ramos, Santiago Upna; Quispe, E. (Universidad Nacional Mayor de San Marcos (Perú), 2019)   Artículo / Artikulua  OpenAccess
    El monitoreo de los diferentes signos vitales en vacunos tiene importancia desde el punto de vista productivo, sanitario y de bienestar animal; sin embargo, existen pocos equipos que tengan el potencial de uso a nivel ...
  • Cloud tomography applied to sky images: a virtual testbed 

    Mejía, Felipe A.; Kurtz, Ben; Levis, Aviad; Parra Laita, Íñigo de la Upna; Kleissl, Jan (Elsevier, 2018)   Artículo / Artikulua
    Two tomographic techniques are applied to two simulated sets of sky images with different cloud fraction. The Algebraic Reconstruction Technique (ART) is applied to optical depth maps from sky images to reconstruct 3-D ...
  • Labyrinth metasurface for biosensing applications: numerical study on the new paradigm of metageometries 

    Jáuregui López, Irati; Rodríguez Ulibarri, Pablo Upna; Kuznetsov, Sergei A.; Quemada Mayoral, Carlos; Beruete Díaz, Miguel Upna (MDPI, 2019)   Artículo / Artikulua  OpenAccess
    The use of metasurfaces operating in the terahertz regime as biosensor devices has attracted increased interest in recent years due to their enhanced sensitivity and more accurate detection capability. Typical designs are ...
  • Multiplexing optical fiber Fabry-Perot interferometers based on air-microcavities 

    Pérez Herrera, Rosa Ana Upna; Novais, S.; Bravo Acha, Mikel Upna; Leandro González, Daniel Upna; Silva, Susana; Frazão, Orlando; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work we demonstrate the multiplexing capability of new optical fiber Fabry-Perot interferometers based on airmicrocavities using a commercial FBG interrogator. Three optimized air-microcavity interferometer sensors ...
  • Micro-drilled optical fiber for enhanced laser strain sensors 

    Pérez Herrera, Rosa Ana Upna; Bravo Acha, Mikel Upna; Roldán Varona, Pablo; Leandro González, Daniel Upna; Rodríguez Cobo, L.; López Higuera, José Miguel; López-Amo Sáinz, Manuel Upna (SPIE, 2019)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    In this work, we present an experimental measurement of temperature and strain sensitivities of a micro-drilled optical fiber (MDOF). The MDOF consisted of a quasi-randomly distributed reflector along a single mode fiber ...
  • General synthesis of tapered matching sections for single mode operation using the coupled-mode theory 

    Percaz Ciriza, Jon Mikel Upna; Arnedo Gil, Israel Upna; Arregui Padilla, Iván Upna; Teberio Berdún, Fernando Upna; Martín Iglesias, Petronilo; Gómez Laso, Miguel Ángel Upna; Lopetegui Beregaña, José María Upna (IEEE, 2019)   Artículo / Artikulua
    In this paper, a novel and general method to synthetize microwave waveguide tapers intended for single mode operation is proposed. The technique is based on the use of an exact series solution of the inverse scattering ...
  • Supercapacitors: electrical characteristics, modelling, applications and future trends 

    Berrueta Irigoyen, Alberto; Ursúa Rubio, Alfredo Upna; San Martín Biurrun, Idoia Upna; Eftekhari, Ali; Sanchis Gúrpide, Pablo Upna (IEEE, 2019)   Artículo / Artikulua  OpenAccess
    Energy storage systems are playing an increasingly important role in a variety of applications, such as electric vehicles or grid-connected systems. In this context, supercapacitors (SCs) are gaining ground due to their ...
  • Gamma radiation measurements using an optical fiber laser 

    Pérez Herrera, Rosa Ana Upna; Stancalie, Andrei; Cabezudo Sánchez-Valverde, Pablo Miguel; Sporea, Dan; Negut, Daniel; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    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 ...
  • Microstructured optical fiber sensor for soil moisture measurements 

    López Aldaba, Aitor Upna; López Torres, Diego Upna; Campo-Bescós, Miguel Upna; López Rodríguez, José Javier; Yerro Lizarazu, David; Elosúa Aguado, César Upna; Arregui San Martín, Francisco Javier Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    A discrete sensor based on a Sn0₂-FP (Fabry-Pérot) cavity is presented and characterized in real soil conditions. Results are compared, for the first time to our knowledge, with a commercial capacitive sensor and gravimetric ...
  • Ultra-long (275 km) random distributed feedback fiber laser for remote sensor monitoring 

    Miguel Soto, Verónica de; Leandro González, Daniel Upna; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena
    An interferometric sensor located 275 km away from the monitoring station has been interrogated by a double-pumped random distributed feedback fiber laser, reaching the longest distance in fiber optic remote sensing reported ...
  • High sensitivity fiber-optic liquid level sensor using biconical tapered fibers 

    Júdez Colorado, Aitor; Leandro González, Daniel Upna; Pérez Herrera, Rosa Ana Upna; Galarza Galarza, Marko; López-Amo Sáinz, Manuel Upna (Optical Society of America, 2018)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
    A liquid level sensor is presented using a biconical tapered standard single-mode fiber, being its main characteristic an outstanding sensitivity for a low cost transducer. Temperature compensation is enabled with the same ...
  • Watt-level green random laser at 532  nm by SHG of Yb-doped fiber laser 

    Rota Rodrigo, Sergio Upna; Gouhier, B.; Dixneuf, C.; Antoni Micollier, L.; Guiraud, G.; Leandro González, Daniel Upna; López-Amo Sáinz, Manuel Upna; Traynor, N.; Santarelli, G. (Optical Society of America, 2018)   Artículo / Artikulua  OpenAccess
    We have developed a Watt-level random laser at 532 nm. The laser is based on a 1064 nm random distributed ytterbium-gain assisted fiber laser seed with a 0.35 nm line-width and 900 mW polarized output power. A study for ...
  • Real time measuring system of multiple chemical parameters using microstructured optical fibers based sensors 

    López Aldaba, Aitor Upna; López Torres, Diego Upna; Elosúa Aguado, César Upna; Arregui San Martín, Francisco Javier Upna; Auguste, Jean-Louis; Jamier, Raphael; Roy, Philippe; López-Amo Sáinz, Manuel Upna (IEEE, 2018)   Artículo / Artikulua  OpenAccess
    In this paper, a multiplexing system for simultaneous interrogation of optical fiber sensors which measure different parameters is presented and validated. The whole system has been tested with 6 different sensing heads ...
  • Far-field and near-field physics of extraordinary THz transmitting hole-array antennas 

    Camacho, Miguel; Boix, Rafael R.; Kuznetsov, Sergei A.; Beruete Díaz, Miguel Upna; Navarro Cía, Miguel (IEEE, 2019)   Artículo / Artikulua  OpenAccess
    Despite three decades of effort, predicting accurately extraordinary transmission through subwavelength hole arrays has proven challenging. The lack of quantitative design and modeling capability to take into account ...

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