Browsing by Subject "Metamaterials"

Now showing items 1-20 of 34

    • A study of super-oscillatory lenses of high frecuencies using metamaterials 

      Legaria Lerga, Santiago (2020)   Trabajo Fin de Máster/Master Amaierako Lana  OpenAccess
      The first part of this work deals with the design, numerical demonstration and experimental characterization of an ultra-thin super-oscillatory lens (SOL) based on metamaterials (MTMs) at the Terahertz range, with a ...

    • Accurate circuit modeling of fishnet structures for negative-index-medium applications 

      Torres Landívar, Víctor Upna; Mesa, Francisco; Navarro Cía, Miguel Upna; Rodríguez Berral, Raúl; Beruete Díaz, Miguel Upna; Medina, Francisco (IEEE, 2016)   Artículo / Artikulua  OpenAccess
      Metallic plates with a two-dimensional (2D) periodic distribution of sub-wavelength apertures are known to exhibit extraordinary transmission of electromagnetic waves. Stacking two or more of such plates gives place to the ...

    • Advanced metamaterials for high resolution focusing and invisibility cloaks 

      Orazbayev, Bakhtiyar Upna (2016)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Los metamateriales, descendientes de los dieléctricos artificiales, tienen parámetros electromagnéticos inusuales y proporcionan más posibilidades que los dieléctricos naturales para el control de la propagación de la luz. ...

    • Blind spot mitigation in phased array antenna using metamaterials 

      Crépin, Thomas; Martel, Cédric; Gabard, Benjamin; Boust, Fabrice; Martinaud, Jean-Paul; Dousset, Thierry; Rodríguez Ulibarri, Pablo Upna; Beruete Díaz, Miguel Upna; Loecker, Claudius; Bertuch, Thomas; Marcotegui, José Antonio Upna; Maci, Stefano (IEEE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a metaradome based on a fakir’s bed of nails is designed and tested in order to suppress the blind directions of a 100-element antenna array. The antenna is a microstrip array designed to operate in X-band. ...

    • Desfasadores para microstrip empleando metamateriales 

      Cantora Álvarez, Alejandro; Gonzalo García, Ramón Upna (2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper an application of LH materials at microwave frequencies (10GHz) is presented. A compact quarter-wave impedance transformer is proposed using alternating sections of left handed media (LHM) and conventional ...

    • Design of a planar meta-surface based on dipoles and wires for antenna applications 

      Sáenz Sáinz, Elena Upna; Gonzalo García, Ramón Upna; Ederra Urzainqui, Íñigo Upna; Maagt, Peter de (2006)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, the design of a planar meta-surface based on dipoles and wires is presented. The unit cell is formed by three independent layers, which contain two parallel dipoles and one wire. The behaviour of these ...

    • Design of terahertz sensors based on metasurfaces for fungal infection detection 

      Jáuregui López, Irati (2016)   Trabajo Fin de Grado/Gradu Amaierako Lana  OpenAccess
      El trabajo propuesto trata sobre el diseño de sensores en la banda de terahercios para la detección de “thin films” y microorganismos, en particular de hongos. En primer lugar, se ha realizado un estudio profundo de ...

    • Dipolos y metamateriales: mejora de las características de radiación 

      Sáenz Sáinz, Elena Upna; Gonzalo García, Ramón Upna; Ederra Urzainqui, Íñigo Upna; Maagt, Peter de (2004)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, pass band properties of Left Handed Media (LHM) are demonstrated. These properties have been used in order to make a LHM super-substrate that is put over a dipole antenna. This super-substrate is going to ...

    • Diseño, simulación, fabricación y medida de lentes de metamaterial acopladas a antenas de bocina 

      Osuna Ruiz, David (2015)   Proyecto Fin de Carrera / Ikasketen Amaierako Proiektua  OpenAccess
      En este proyecto fin de carrera se presenta un sistema formado por una antena de bocina y una lente metálica de metamaterial basada en transmisión extraordinaria. Como ya se ha demostrado en el pasado, la aplicación de ...

    • Electroinductive waves in chain of complementary metamaterial elements 

      Beruete Díaz, Miguel Upna; Falcone Lanas, Francisco Javier Upna; Freire, M. J.; Marqués, R.; Baena, J.D. (AIP Publishing, 2006)   Artículo / Artikulua  OpenAccess
      Electronductive waves supported by chains of resonators drilled on a metallic plate are presented. Propagation of energy comes as a consequence of the electric coupling between these resonators. Therefore, these waves ...

    • Epsilon-near-zero metalenses operating in the visible 

      Pacheco-Peña, Víctor Upna; Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna (Elsevier, 2016)   Artículo / Artikulua  OpenAccess
      Several converging lenses working in the permittivity near to zero (ENZ) regime at optical frequencies are designed using an array of metal-dielectric-metal plasmonic waveguides. These plasmonic waveguides show a dispersive ...

    • Estudio sobre resonadores en tecnología microstrip como sensor de medida de grosor de materiales a 24GHz 

      Lezaun Capdevila, Carlos (2019)   Trabajo Fin de Grado/Gradu Amaierako Lana  OpenAccess
      Diversas aplicaciones industriales requieren de la caracterización y medición de materiales con alta precisión. En las últimas décadas se han investigado métodos para realizar dichas mediciones ...

    • Experimental demonstration of a millimeter-wave metallic ENZ lens based on the energy squeezing principle 

      Torres Landívar, Víctor Upna; Orazbayev, Bakhtiyar Upna; Pacheco Peña, Víctor Upna; Teniente Vallinas, Jorge Upna; Beruete Díaz, Miguel Upna; Navarro Cía, Miguel Upna; Sorolla Ayza, Mario Upna (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      The performance of an epsilon-near zero (ENZ) plano-concave lens is experimentally demonstrated and verified at the D-band of the millimeter-waves. The lens is comprised of an array of narrow metallic waveguides near cut-off ...

    • Experimental demonstration of metamaterials application for mitigating scan blindness in phased array antennas 

      Rodríguez Ulibarri, Pablo Upna; Crépin, Thomas; Martel, Cédric; Boust, Fabrice; Falcone Lanas, Francisco Javier Upna; Loecker, Claudius; Herbertz, Kai; Bertuch, Thomas; Dousset, Thierry; Martinaud, Jean-Paul; Maci, Stefano; Marcotegui, José Antonio Upna; Beruete Díaz, Miguel Upna (EDP Sciences, 2016)   Artículo / Artikulua  OpenAccess
      This paper presents two metamaterial-inspired solutions to mitigate the scan blindness effects in a phased array antenna. In the first solution, portions of a bed of nails are introduced in the radome to prevent the excitation ...

    • Experimental realization of an epsilon-near-zero graded-index metalens at terahertz frequencies 

      Pacheco-Peña, Víctor Upna; Engheta, Nader; Kuznetsov, Sergei A.; Gentselev, Alexandr; Beruete Díaz, Miguel Upna (American Physical Society, 2017)   Artículo / Artikulua  OpenAccess
      The terahertz band has been historically hindered by the lack of efficient generators and detectors, but a series of recent breakthroughs have helped to effectively close the “terahertz gap.” A rapid development of terahertz ...

    • Full three-dimensional isotropic transformation media 

      García Meca, Carlos; Ortuño Molinero, Rubén Upna; Martí, J.; Martínez, Alejandro (IOP Publishing, 2014)   Artículo / Artikulua  OpenAccess
      We present a method that enables the implementation of full three-dimensional (3D) transformation media with minimized anisotropy. It is based on a special kind of shape-preserving mapping and a subsequent optimization ...

    • Hedgehog subwavelength hole arrays: control over the THz enhanced transmission 

      Navarro Cía, Miguel Upna; Rodríguez Ulibarri, Pablo Upna; Beruete Díaz, Miguel Upna (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 ...

    • Lensing system and Fourier transformation using epsilon-near-zero metamaterials 

      Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna; Engheta, Nader (American Physical Society, 2012)   Artículo / Artikulua  OpenAccess
      Metamaterials and metastructures with effective relative permittivity near zero exhibit unusual wave properties such as uniform phase distributions across such domains. Here we discuss the possibility of using ε-near-zero ...

    • Meta-material behaviour of the new Coherently Radiating Periodic Structures (CORPS) 

      Betancourt Quiñones, Diego Upna; Ibáñez Loinaz, Asier; García Esparza, Raúl Upna; Río Bocio, Carlos del Upna (2005)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this paper, the study of the new Coherently Radiating Periodic Structures (CORPS) like a Metamaterial sets out. The shape of the structure under study is composed by two different layers, one layer is an array of ...

    • Metamaterials and extraordinary transmission structures applied to microwave, millimeter and terahertz waves devices 

      Rodríguez Ulibarri, Pablo Upna (2017)   Tesis doctoral / Doktoretza tesia  OpenAccess
      Los metamateriales aparecen en los primeros años del siglo XXI como materiales artificiales que presentan un comportamiento electromagnético de alguna manera exótico. Al mismo tiempo, se descubre un nuevo fenómeno ...

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