Recent Submissions

  • Simultaneous generation of surface plasmon and lossy mode resonances in the same planar platform 

    Fuentes Lorenzo, Omar Upna; Del Villar, Ignacio Upna Orcid; Domínguez Catena, Iris Upna Orcid; Corres Sanz, Jesús María Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2022)   Artículo / Artikulua  OpenAccess
    A planar waveguide consisting of a coverslip for a microscope glass slide was deposited in one of its two faces with two materials: silver and indium tin oxide (ITO). The incidence of light by the edge of the coverslip ...
  • Dual-polarized highly folded bowtie antenna with slotted self-grounded structure for sub-6 GHz 5G applications 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Shukla, Panchamkumar; Mansouri Moghaddam, Sadegh; Zaman, Ashraf Uz; Shafqaat, Samia; Akinsolu, Mobayode O.; Liu, Bo; Yang, Jian; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid; Limiti, Ernesto (IEEE, 2021)   Artículo / Artikulua  OpenAccess
    In this paper, a novel dual-polarized highly-folded self-grounded Bowtie antenna that is excited through I-shaped slots is proposed for applications in sub-6GHz 5G multiple-input-multiple-output (MIMO) antenna systems. The ...
  • A metasurface-based single-layered compact AMC-backed dual-band antenna for off-body IoT devices 

    Ahmad, Sarosh; Paracha, Kashif Nisar; Sheikh, Yawar Ali; Ghaffar, Adnan; Butt, Arslan Dawood; Alibakhshikenari, Mohammad; Soh, Ping Jack; Khan, Salahuddin; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2021)   Artículo / Artikulua  OpenAccess
    In this article, a compact printed monopole dual-band antenna using artificial magnetic conductor (AMC)-plane with improved gain and broader bandwidth, applicable for off-body internet of things (IoT) devices is presented. ...
  • A comprehensive survey on 'circular polarized antennas' for existing and emerging wireless communication technologies 

    Nadeem, Iram; Alibakhshikenari, Mohammad; Babaeian, Fatemeh; Althuwayb, Ayman Abdulhadi; Virdee, Bal S.; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Khan, Salahuddin; Huynen, Isabelle; Falcone Lanas, Francisco Javier Upna Orcid; Denidni, Tayeb A.; Limiti, Ernesto (IOP Publishing, 2022)   Artículo / Artikulua  OpenAccess
    Circular polarized (CP) antennas are well suited for long-distance transmission attainment. In order to be adaptable for beyond 5G communication, a detailed and systematic investigation of their important conventional ...
  • Experimental assessment of first- and second-life electric vehicle batteries: performance, capacity dispersion, and aging 

    Braco Sola, Elisa Upna; San Martín Biurrun, Idoia Upna Orcid; Berrueta Irigoyen, Alberto Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid (IEEE, 2021)   Artículo / Artikulua  OpenAccess
    Nowadays, the reuse of electric vehicle batteries is considered to be a feasible alternative to recycling, as it allows them to benefit from their remaining energy capacity and to enlarge their lifetime. Stationary ...
  • Optimum power transfer in RF front end systems using adaptive impedance matching technique 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; See, Chan H.; Abd-Alhameed, Raed; Althuwayb, Ayman Abdulhadi; Falcone Lanas, Francisco Javier Upna Orcid; Huynen, Isabelle; Denidni, Tayeb A.; Limiti, Ernesto (Nature Research, 2021)   Artículo / Artikulua  OpenAccess
    Matching the antenna’s impedance to the RF-front-end of a wireless communications system is challenging as the impedance varies with its surround environment. Autonomously matching the antenna to the RF-front-end is therefore ...
  • Láseres de fibra óptica 

    Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Versys, 2011)   Artículo / Artikulua  OpenAccess
    Desde su desarrollo en los años 60 hasta nuestros días, los láseres de fibra óptica han ido incrementando su importancia en diversos ámbitos de nuestra vida. Ya sea en la medicina, la electrónica de consumo o la industria, ...
  • Random DFB fiber laser for remote (200 km) sensor monitoring using hybrid WDM/TDM 

    Leandro González, Daniel Upna Orcid; Miguel Soto, Verónica de Upna Orcid; Pérez Herrera, Rosa Ana Upna Orcid; Bravo Acha, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
    In this paper, a random distributed feedback fiber laser is proposed as a multiplexing scheme for ultralong range measurements (up to 200 km). Optical fiber sensors are time and wavelength multiplexed overcoming one of the ...
  • Simultaneous measurement of humidity and vibration based on a microwire sensor system using Fast Fourier Transform technique 

    Rota Rodrigo, Sergio Upna; López Aldaba, Aitor Upna; Pérez Herrera, Rosa Ana Upna Orcid; López Bautista, María del Carmen; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
    This paper presents a new sensor system for vibration and relative humidity measurements based on its interaction with the evanescent field of a microwire. The interrogation of the sensing head is carried out by monitoring ...
  • Fiber optic sensor networks 

    Pérez Herrera, Rosa Ana Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Elsevier, 2013)   Artículo / Artikulua  OpenAccess
    One of the main goals in fiber optic sensor technology is to multiplex together a high number of sensorsin the same network in order to share expensive terminal equipment and develop a system including multiple measuring ...
  • Low noise dual-wavelength erbium fiber laser in single-longitudinal-mode operation 

    Rota Rodrigo, Sergio Upna; Pérez Herrera, Rosa Ana Upna Orcid; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (Springer, 2012)   Artículo / Artikulua  OpenAccess
    A new stable dual-wavelength fiber-ring laser based on erbium-doped fiber amplification is reported. The laser is based on ring resonators and employs fiber Bragg gratings to select the operation wavelengths. The ...
  • Stabilization of dual-wavelength erbium doped ring fiber lasers by single-mode operation 

    Quintela, M. A.; Pérez Herrera, Rosa Ana Upna Orcid; Canales, Irene; Fernández Vallejo, Montserrat Upna; López-Amo Sáinz, Manuel Upna Orcid (IEEE, 2010)   Artículo / Artikulua  OpenAccess
    In this work, a novel single-longitudinal-mode (SLM) dual-wavelength laser configuration is proposed and demonstrated. This laser is based on ring resonators, and employs fiber Bragg gratings to select the operation ...
  • Experimental optimization in terms of power stability and output power of highly Er-doped fiber lasers with single and hybrid cavities 

    Pérez Herrera, Rosa Ana Upna Orcid; Chen, Shuying; Zhao, Weizhong; Sun, Tong; López-Amo Sáinz, Manuel Upna Orcid (Taylor & Francis, 2010)   Artículo / Artikulua  OpenAccess
    In this article, the output power stability of several different highly erbiumdoped fiber ring lasers, as a function of the laser parameters, is experimentally investigated. The study is focused on the optimization of ...
  • Advances in residential design related to the influence of geomagnetism 

    Glaria, Francisco; Arnedo Gil, Israel Upna Orcid; Sánchez Ostiz, Ana (MDPI, 2018)   Artículo / Artikulua  OpenAccess
    Since the origin of the Modern Movement, there has been a basic commitment to improving housing conditions and the well-being of occupants, especially given the prediction that 2/3 of humanity will reside in cities by 2050. ...
  • End-of-fiber signals strongly influence the first and second phases of the M wave in the vastus lateralis: implications for the study of muscle excitability 

    Rodríguez Falces, Javier Upna Orcid; Place, Nicolas (Frontiers Media, 2018)   Artículo / Artikulua  OpenAccess
    It has been recurrently observed that, for compound muscle action potentials (M wave) recorded over the innervation zone of the vastus lateralis, the descending portion of the first phase generally shows an 'inflection' ...
  • Fuzzy logic-based energy management system design for residential grid-connected microgrids 

    Arcos Avilés, Diego; Pascual Miqueleiz, Julio María Upna Orcid; Marroyo Palomo, Luis Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid; Guinjoan Gispert, Francesc (IEEE, 2018)   Artículo / Artikulua  OpenAccess
    This paper presents the design of a low complexity fuzzy logic controller of only 25-rules to be embedded in an energy management system for a residential grid-connected microgrid including renewable energy sources and ...
  • Wideband printed monopole antenna for application in wireless communication systems 

    Alibakhshikenari, Mohammad; Virdee, Bal S.; See, Chan H.; Abd-Alhameed, Raed; Falcone Lanas, Francisco Javier Upna Orcid (IET, 2018)   Artículo / Artikulua  OpenAccess
    Empirical results of an electrically small printed monopole antenna are described with a fractional bandwidth of 185% (115 MHz to 2.90 GHz) for return-loss better than 10 dB, peak gain and radiation efficiency at 1.45 GHz ...
  • A masked least-squares smoothing procedure for artifact reduction in scanning-EMG recordings 

    Corera Orzanco, Íñigo Upna Orcid; Eciolaza Ferrando, Adrián Upna; Rubio Zamora, Oliver Upna; Malanda Trigueros, Armando Upna Orcid; Rodríguez Falces, Javier Upna Orcid; Navallas Irujo, Javier Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
    Scanning-EMG is an electrophysiological technique in which the electrical activity of the motor unit is recorded at multiple points along a corridor crossing the motor unit territory. Correct analysis of the scanning-EMG ...
  • Real-time imaging with frequency scanning array antenna for industrial inspection applications at W band 

    Larumbe Gonzalo, Belén Upna; Laviada, Jaime; Ibáñez Loinaz, Asier; Teniente Vallinas, Jorge Upna Orcid (Springer, 2018)   Artículo / Artikulua  OpenAccess
    A real-time imaging system based on a frequency scanning antenna for conveyor belt setups is presented in this paper. The frequency scanning antenna together with an inexpensive parabolic reflector operates at the W band ...
  • Correlation between discharge timings of pairs of motor units reveals the presence but not the proportion of common synaptic input to motor neurons 

    Rodríguez Falces, Javier Upna Orcid; Negro, Francesco; Farina, Dario (American Physiological Society, 2017)   Artículo / Artikulua  OpenAccess
    We investigated whether correlation measures derived from pairs of motor unit (MU) spike trains are reliable indicators of the degree of common synaptic input to motor neurons. Several 50-s isometric contractions of the ...

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