• Challenges in wireless system integration as enablers for indoor context aware environments 

      López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2017)   Artículo / Artikulua  OpenAccess
      The advent of fully interactive environments within Smart Cities and Smart Regions requires the use of multiple wireless systems. In the case of user-device interaction, which finds multiple applications such as Ambient ...
    • Characterization and consideration of topological impact of wireless propagation in a commercial aircraft environment [wireless corner] 

      Rajo-Iglesias, Eva; Aguirre Gallego, Erik Upna Orcid; López Iturri, Peio Upna Orcid; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Arpón Díaz-Aldagalán, Javier; Falcone Lanas, Francisco Upna Orcid (IEEE, 2013)   Artículo / Artikulua  OpenAccess
      Wireless systems are gaining a relevant role for multiple communication tasks within commercial aircrafts. In this work, wireless propagation in an indoor commercial airplane cabin will be analyzed. The impact of indoor ...
    • Characterization and modeling of the capacitive HBC Channel 

      Pereira, Maicon D.; Álvarez Botero, Germán Andrés; Sousa, Fernando Rangel de (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      The increasing interest in wireless body area networks has created the need for alternative communication schemes. One example of such schemes is the use of the human body as a communication medium. This technology is ...
    • Characterization of microring filters for differential group delay applications 

      Doménech, D.; Chamorro Posada, P.; Fraile Pelaez, F.J.; Erro Betrán, María José Upna Orcid; Tainta Ausejo, Santiago Upna Orcid; Muriel, M. A.; Baños, R.; Bolten, J.; Kleinjans, H. (IEEEOptical Society of America, 2017)   Artículo / Artikulua  OpenAccess
      The longitudinal offset technique permits to improve the accuracy of the coupling coefficients of integrated directional couplers and provides designs that can be easily implemented with current fabrication tolerances. ...
    • Characterization of near-ground radio propagation channel for wireless sensor network with application in smart agriculture 

      Klaina, Hicham Upna; Alejos, Ana; Aghzout, Otman; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this contribution, we present a narrowband radio channel model for a scenario wherein the radio link operates under near-ground conditions, occurring on a ZigBee wireless sensor networks applied to smart agriculture. ...
    • Characterization of radio propagation channel in urban vehicle to infrastructure environments to support WSNs 

      Granda, Fausto; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Vargas Rosales, César; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Vehicular ad hoc Networks (VANETs) enable vehicles to communicate with each other as well as with roadside units (RSUs). Although there is a significant research effort in radio channel modelling focused in vehicle to ...
    • Characterization of RF-MOSFETs in common-source configuration at different source-to-bulk voltages from S-parameters 

      Zárate-Rincón, Fabián; Álvarez Botero, Germán Andrés; Torres-Torres, Reydezel; Murphy-Arteaga, Roberto S.; Decoutere, Stefaan (IEEE, 2013)   Artículo / Artikulua  OpenAccess
      Using a new test fixture that allows us to bias the bulk terminal through an additional compensated DC probe, a two-port S-measurement-based methodology to characterize RF-MOSFETs in common-source configuration is herein ...
    • Characterization of wireless channel impact on wireless sensor network performance in public transportation buses 

      Azpilicueta Fernández de las Heras, Leyre Upna Orcid; López Iturri, Peio Upna Orcid; Aguirre Gallego, Erik Upna Orcid; Astrain Escola, José Javier Upna Orcid; Villadangos Alonso, Jesús Upna Orcid; Zubiri Segura, Cristóbal; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      Wireless communications systems are growing rapidly during the last two decades and they are gaining a significant role for multiple communication tasks within public transportation buses. In this work, the impact of ...
    • Characterization of wireless propagation in complex indoor environments 

      Azpilicueta Fernández de las Heras, Leyre Upna Orcid (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      En este trabajo de investigación se ha propuesto un nuevo modelo de propagación determinista para analizar la propagación radioeléctrica en entornos complejos. En primer lugar, se ha realizado un profundo análisis de los ...
    • Chirping techniques to maximize the power-handling capability of harmonic waveguide low-pass filters 

      Teberio Berdún, Fernando Upna Orcid; Arregui Padilla, Iván Upna Orcid; Gómez Torrent, Adrián Upna Orcid; Arnedo Gil, Israel Upna Orcid; Chudzik, Magdalena Upna; Zedler, Michael; Goertz, Franz-Josef; Jost, Rolf; Lopetegui Beregaña, José María Upna Orcid; Gómez Laso, Miguel Ángel Upna Orcid (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      A novel chirping technique is applied to the design of very high-power waveguide harmonic low-pass filters. The technique could be used, for instance, to avoid multipactor testing in multicarrier systems such as the ...
    • Choked-gaussian corrugated horn antenna design small global coverage horn antenna for TT&C with extremely low sidelobe level 

      Teniente Vallinas, Jorge Upna Orcid; Gonzalo García, Ramón Upna Orcid; Río Bocio, Carlos del Upna Orcid (2003)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Extremely low sidelobe horn antennas are often required for the actual technology. This type of horn antennas are important to avoid interference with other systems. In this paper we describe a new design implementing a ...
    • Circuit and multipolar approaches to investigate the balance of powers in 2D scattering problems 

      Liberal Olleta, Íñigo Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Gonzalo García, Ramón Upna Orcid; Ziolkowski, Richard W. (EMW Publishing, 2013)   Artículo / Artikulua  OpenAccess
      Circuit and multipolar approaches are presented to investigate the correlation between absorption and scattering processes in 2D problems. This investigation was inspired by earlier works of Prof.R.E. Collin, which pointed ...
    • Circuit approach to the minimal configuration of terahertz anomalous extraordinary transmission 

      Beruete Díaz, Miguel Upna Orcid; Navarro Cía, Miguel Upna Orcid; Kuznetsov, Sergei A.; Sorolla Ayza, Mario Upna (American Institute of Physics, 2011)   Artículo / Artikulua  OpenAccess
      In this letter we present an in-depth circuit analysis of anomalous extraordinary transmission ET through subwavelength slit and hole arrrays loaded by a dielectric slab. We show the key role played by the thickness of the ...
    • Ciudad y tecnología. Metodología de estudio para ciudades inteligentes 

      Branchi, Pablo Emilio Upna (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      La revolución digital actual ha revolucionado la evolución de las redes de comunicación así como el desarrollo de nuevos esquemas productivos. Los escenarios tecnológicos tradicionales asumen nuevos retos, y las ciudades ...
    • Coherently radiating periodic structures (CORPS) and the human eye: working principle 

      Betancourt Quiñones, Diego Upna; Ibáñez Loinaz, Asier; Río Bocio, Carlos del Upna Orcid (2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper a new philosophy to design antenna systems is presented. It is based on the recently proposed Coherently Radiating Periodic Structures (CORPS). These structures are essentially a periodic structure which ...
    • Coherently radiating periodic structures (CORPS): a step towards high resolution imaging systems? 

      García Esparza, Raúl Upna; Betancourt Quiñones, Diego Upna; Ibáñez Loinaz, Asier; Río Bocio, Carlos del Upna Orcid (IEEE, 2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The coherently radiating periodic structures (CORPS) uses the existing mutual coupling between the elements of an array to spread horizontally and coherently (in-phase) the complex amplitudes of each active element ...
    • Coherently radiating periodic structures (CORPS): aplicaciones prácticas 

      Ibáñez Loinaz, Asier; Betancourt Quiñones, Diego Upna; Río Bocio, Carlos del Upna Orcid (2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper some possible applications of the new philosophy to design antenna systems based on the Coherently Radiating Periodic Structures (CORPS) is presented. This principle could allow the designer to simplify ...
    • Comment on “A waveguide slit array antenna fabricated with subwavelength periodic grooves Appl. Phys. Lett. 91, 143512 (2007)” 

      Beruete Díaz, Miguel Upna Orcid; Falcone Lanas, Francisco Javier Upna Orcid; Sorolla Ayza, Mario Upna; Campillo, Igor; Dolado, J. S.; Rodríguez Seco, J. E.; Perea, E. (AIP Publishing, 2008)   Otros / Bestelakoak  OpenAccess
      We firmly think that it is proven that most of the ideas, results, and discussions presented in C. Huang, C. L. Du, and X. G. Luo, Appl. Phys. Lett. 91, 143512, 2007 were already present in our previous paper (M. Beruete, ...
    • Compact and highly-efficient polarization independent vertical resonant couplers for active-passive monolithic integration 

      Galarza Galarza, Marko Upna Orcid; Thourhout, Dries Van; Baets, Roel; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2008)   Artículo / Artikulua  OpenAccess
      Compact low-loss polarization independent vertical coupling between a 1.55 μm InGaAsP bulk active waveguide and a passive waveguide based on bimodal interference is presented. Simulation results show low coupling loss (<0.1 ...
    • Compact dual-band terahertz quarter-wave plate metasurface 

      Torres Landívar, Víctor Upna; Etayo Salinas, David Upna; Ortuño Molinero, Rubén Upna; Navarro Cía, Miguel Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2014)   Artículo / Artikulua  OpenAccess
      A dual-band quarter-wave plate based on a modified extraordinary transmission hole array is numerically analyzed and experimentally demonstrated at terahertz frequencies. To control independently orthogonal polarizations, ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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