• Generation of the HE11 mode in rectangular waveguide using gaussian techniques 

      Teniente Vallinas, Jorge Upna Orcid; Gonzalo García, Ramón Upna Orcid; Sorolla Ayza, Mario Upna; Río Bocio, Carlos del Upna Orcid (IEEE, 1999)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A new and efficient design of a rectangular corrugated waveguide mode converter, from TE10 mode in a smooth rectangular monomode waveguide to HE11 mode in a corrugated rectangular waveguide, is proposed. The main idea ...
    • Geometry influence on the transmission spectra of dielectric single layers of spheres with different compactness 

      Andueza Unanua, Ángel María Upna Orcid; Echeverría, R.; Morales Zimmermann, Paola Andrea Upna; Sevilla Moróder, Joaquín Upna Orcid (AIP Publishing, 2010)   Artículo / Artikulua  OpenAccess
      The transmission of spectra of different dielectric spheres single layer arrangements has been measured. High dielectric permittivity ε =7 spheres of several millimeters of diameter were used to build the samples whose ...
    • Geometry-invariant resonant cavities 

      Liberal Olleta, Íñigo Upna Orcid; Mahmoud, A. M.; Engheta, Nader (Springer Nature, 2016)   Artículo / Artikulua  OpenAccess
      Resonant cavities are one of the basic building blocks in various disciplines of science and technology, with numerous applications ranging from abstract theoretical modelling to everyday life devices. The eigenfrequencies ...
    • Giant sensitivity of optical fiber sensors by means of lossy moderesonance 

      Arregui San Martín, Francisco Javier Upna Orcid; Del Villar, Ignacio Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Here we show an optical refractometer with a giant sensitivity of 304,360 nm per refractive index unit(nm/RIU). This sensitivity corresponds to a resolution of 3.28 × 10−9RIU if a standard optical spectrumanalyzer with a ...
    • Glottal spectrum based inverse filtering 

      Arroabarren Alemán, Ixone Upna; Carlosena García, Alfonso Upna Orcid (ISCA, 2003)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper a new inverse filtering technique for the time-domain estimation of the glottal excitation is presented. This approach uses the DAP modeling for the vocal tract characterization, and a spectral model for the ...
    • Gramática de las gráficas: pistas para mejorar las representaciones de datos 

      Sevilla Moróder, Joaquín Upna Orcid (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2005)   Libro / Liburua  OpenAccess
      Periodistas, científicos, sociólogos, ingenieros, economistas... En multitud de profesiones nos encontramos con la necesidad de interpretar o de realizar gráficas. Las gráficas son elementos habituales en multitud de ...
    • Grid integration of large-scale PV plants 

      Parra Laita, Íñigo de la Upna Orcid (2015)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Over the last few years, the considerable increase in the number of multi-MW PV plants has led transmission system operators (TSO) to express concern over potential PV power fluctuations caused by transient clouds. As a ...
    • Growth in the number of references in engineering journal papers during the 1972-2013 period 

      Úcar Marqués, Iñaki; López Fernandino, Felipe; Rodríguez Ulibarri, Pablo Upna Orcid; Sesma Sánchez, Laura Upna; Urrea Micó, Verónica Upna; Sevilla Moróder, Joaquín Upna Orcid (Springer, 2014)   Artículo / Artikulua  OpenAccess
      The number of references per paper, perhaps the best single index of a journal’s scholarliness, has been studied in different disciplines and periods. In this paper we present a four decade study of eight engineering ...
    • Hedgehog subwavelength hole arrays: control over the THz enhanced transmission 

      Navarro Cía, Miguel Upna Orcid; Rodríguez Ulibarri, Pablo Upna Orcid; Beruete Díaz, Miguel Upna Orcid (Institute of Physics Publishing, 2013)   Artículo / Artikulua  OpenAccess
      By backing or sandwiching a holey metal layer with or between isotropic dielectric slabs, additional peaks of transmission within the long-wavelength regime arise as a result of the induced transverse magnetic (TM) or ...
    • High aperture efficiency wide corrugations bull’s-eye antenna working at 60 GHz 

      Beaskoetxea Gartzia, Unai Upna Orcid; Beruete Díaz, Miguel Upna Orcid (IEEE, 2017)   Artículo / Artikulua  OpenAccess
      A full metallic Bull’s-Eye (BE) antenna operating at 60 GHz is numerically and experimentally analyzed. The antenna presents wide grooves, rather than narrow ones, which support higher order resonances that lead to a large ...
    • High efficient dipole antennas by using left-handed superstrates 

      Sáenz Sáinz, Elena Upna; Gonzalo García, Ramón Upna Orcid; Ederra Urzainqui, Íñigo Upna Orcid; Maagt, Peter de (2004)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This paper deals with pass band properties of Left Handed Media (LHM) to enhance dipole antenna performances. The LHM properties have been used in order to make high directivity antennas with good return loss features. The ...
    • High frequency power transformers with foil windings: maximum interleaving and optimal design 

      Barrios Rípodas, Ernesto Upna Orcid; Urtasun Erburu, Andoni Upna Orcid; Ursúa Rubio, Alfredo Upna Orcid; Marroyo Palomo, Luis Upna Orcid; Sanchis Gúrpide, Pablo Upna Orcid (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      Foil conductors and primary and secondary interleaving are normally used to minimize winding losses in high frequency transformers used for high-current power applications. However, winding interleaving complicates the ...
    • High order mode beam waveguide for technological medium power millimeter wave applications 

      Río Bocio, Carlos del Upna Orcid; Gonzalo García, Ramón Upna Orcid; Marín Pilz, Miguel Upna; Sorolla Ayza, Mario Upna; Möbius, Arnold; Thumm, Manfred (1995)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The use of medium power millimeter wave CW gyrotrons (10- 30 kW and 30-100 GHz) has several potential applications in advanced materials processing. Since a stochastic field distribution in the applicator is desirable ...
    • High resolution polarization-independent highbirefringence fiber loop mirror sensor 

      Leandro González, Daniel Upna Orcid; Bravo Acha, Mikel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
      In this work, two all polarization-maintaining (PM) highbirefringence (Hi-Bi) fiber loop mirrors (FLM) which are immune to external polarization perturbations are validated both theoretically and experimentally. Simplified ...
    • High sensitive and selective C-reactive protein detection by means of lossy mode resonance based optical fiber devices 

      Zubiate Orzanco, Pablo Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Sánchez Zábal, Pedro Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Elsevier, 2017)   Artículo / Artikulua  OpenAccess
      This work presents the development of high sensitive, selective, fast and reusable C-reactive protein (CRP) aptasensors. This novel approach takes advantage of the utilization of high sensitive refractometers based on ...
    • High sensitive refractometers based on lossy mode resonances (LMRs) supported by ITO coated D-shaped optical fibers 

      Zubiate Orzanco, Pablo Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid; Arregui San Martín, Francisco Javier Upna Orcid (Optical Society of America, 2015)   Artículo / Artikulua  OpenAccess
      Tin doped indium oxide (ITO) coatings fabricated onto D-shaped optical fibers are presented as the supporting medium for Lossy Mode Resonances (LMRs) generation. The characteristic geometry of ITO-coated D-shaped optical ...
    • High-order PLL design with constant phase margin 

      Ugarte Gil, Mikel Upna; Carlosena García, Alfonso Upna Orcid (IEEE, 2010)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper we describe a novel procedure to design high-type high-order Phase Locked Loops (PLLs) from lower order prototypes, preserving a prescribed Phase Margin (PM). The method builds on a model recently proposed ...
    • High-resolution transversal load sensor using a random distributed feedback fiber laser 

      Miguel Soto, Verónica de Upna Orcid; Leandro González, Daniel Upna Orcid; López-Amo Sáinz, Manuel Upna Orcid (SPIE, 2016)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a new application of random distributed feedback lasers to fiber optic sensing has been presented. The particular properties of these lasers, such as the lack of longitudinal modes and high stability, have ...
    • Highly-efficient fully resonant vertical couplers for InP active-passive monolithic integration using vertically phase matched waveguides 

      García López, Óscar; Lasaosa Medarde, Daniel Upna; López-Amo Sáinz, Manuel Upna Orcid; Galarza Galarza, Marko Upna Orcid (Optical Society of America, 2013)   Artículo / Artikulua  OpenAccess
      A new active-passive monolithic integration approach for photonic components based on vertical evanescent coupling is presented. Two vertically stacked waveguides are used in order to provide full resonant power transfer ...
    • Horn antenna lens for multi-beam applications 

      Lizarraga Cubillos, Juan Camilo Upna; Río Bocio, Carlos del Upna Orcid (2010)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A spherical discrete lens antenna based on the back-toback combination of two choked-horn antennae arrays interconnected through smooth waveguides sections implementing the spherical phasing law, has been designed, simulated ...

      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).
      Logo MinisterioLogo Fecyt