Now showing items 1-8 of 8

    • All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: experimental results 

      Orazbayev, Bakhtiyar Upna; Torres Landívar, Víctor Upna; Pacheco Peña, Víctor Upna; Falcone Lanas, Francisco Javier Upna; Teniente Vallinas, Jorge Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna; Navarro Cía, Miguel Upna; Engheta, Nader (IEEE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Here we perform numerical and experimental investigation of plano-concave all-metallic ε-near-zero (ENZ) lens with operational frequency f = 144 GHz. The ENZ lens is achieved by stacking an array of narrow hollow rectangular ...
    • Analysis of surface-plasmon-like modes under an engineering perspective 

      Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna (2011)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this communication we show how one can exploit equivalent circuits to analyze surface-plasmon-like modes (slit and hole arrays, Sievenpiper mushrooms and coaxial hole arrays) and to propose new designs with outstanding ...
    • The beauty of anisotropy in extraordinary transmission fishnet metamaterials 

      Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna (2011)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, we explore both numerically and experimentally, the possibility to obtain positive and negative refraction regimes that depend on the wave polarization, exploiting the strong anisotropy of extraordinary ...
    • 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. ...
    • Comportamiento de propagacion electromagnetica en el apilamiento de agujeros sublambda y agujeros propagantes 

      Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Falcone Lanas, Francisco Javier Upna; Campillo, Igor; Sorolla Ayza, Mario Upna (2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, we provide more insight on the physics underlying the transmission through subwavelength hole arrays metaprism by comparing it with propagating hole arrays prism. We show the critical role that the size ...
    • Lentes metálicas basadas en el fenómeno de transmisión extraordinaria para conseguir índices de refracción negativos 

      Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna; Campillo, Igor (2009)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this communication we report plano-concave and bi-concave metamaterial lenses based on the close stack of subwavelegnth hole arrays. Contrary to what is expected from cut-off holes, an engineered array of holes ...
    • Low profile THz periodic leaky-wave antenna 

      Beaskoetxea Gartzia, Unai Upna; Beruete Díaz, Miguel Upna; Rodríguez Ulibarri, Pablo Upna; Etayo Salinas, David Upna; Sorolla Ayza, Mario Upna; Navarro Cía, Miguel Upna; Zehar, Mokhtar; Blary, Karine; Chahadih, Abdallah; Han, Xiang-Lei; Akalin, Tahsin (IEEE, 2014)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this work, a 0.566THz flat leaky-wave antenna, consisting of a central λ0/2 slot surrounded by straight parallel wedge corrugations, is numerically and experimentally analyzed. Simulations show a moderately high gain ...
    • New regimes to achieve enhanced transmission through subwavelength hole arrays 

      Navarro Cía, Miguel Upna; Beruete Díaz, Miguel Upna; Sorolla Ayza, Mario Upna (2011)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this communication we present millimetre- and THz-waves experimental confirmation of enhanced transmission through subwavelength hole arrays with rectangular lattice when the incident electric field is parallel to ...