Now showing items 289-292 of 292

    • Zoned fishnet lens antenna with reference phase for side lobe reduction 

      Pacheco Peña, Víctor Upna; Navarro Cía, Miguel Upna; Orazbayev, Bakhtiyar Upna; Minin, Igor V.; Minin, Oleg V.; Beruete Díaz, Miguel Upna (IEEE, 2015)   Artículo / Artikulua  OpenAccess
      Reduction of first side lobe level and nulls in artificial fishnet metalenses is accomplished here by applying the reference phase concept along with the zoning technique. Higher focusing efficiency is achieved for a ...
    • Zoned near-zero refractive index fishnet lens antenna: steering millimeter waves 

      Pacheco Peña, Víctor Upna; Orazbayev, Bakhtiyar Upna; Beaskoetxea Gartzia, Unai Upna; Beruete Díaz, Miguel Upna; Navarro Cía, Miguel Upna (AIP Publishing, 2014)   Artículo / Artikulua  OpenAccess
      A zoned fishnet metamaterial lens is designed, fabricated, and experimentally demonstrated at millimeter wavelengths to work as a negative near-zero refractive index lens suitable for compact lens antenna configurations. ...
    • Zuntz optikoan oinarritutako sentsoreen prestazioen muga-efektu berria, egituren egoera monitorizatzea helburu 

      Iribas Pardo, Haritz; Mariñelarena Ollacarizqueta, Jon Upna; Loayssa Lara, Alayn Upna (Udako Euskal Unibertsitatea, 2017)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Brillouin denbora-eremu optikoaren analisian (BOTDA) oinarritutako sentsoreak estruktura handien (120 km luzerako estrukturak) deformazioa eta tenperatura neurtzeko gaitasuna dute, metro bateko bereizmen espazialarekin. ...
    • ε-near-zero (ENZ) graded index quasi-optical devices: steering and splitting millimeter waves 

      Pacheco Peña, Víctor Upna; Torres Landívar, Víctor Upna; Beruete Díaz, Miguel Upna; Navarro Cía, Miguel Upna; Engheta, Nader (IOP Publishing, 2014)   Artículo / Artikulua  OpenAccess
      Graded index ε near-zero (GRIN-ENZ) quasi-optical components such as beam steerers and power splitters are designed, simulated and analyzed. The GRIN-ENZ medium is realized using stacked narrow hollow waveguides whose ...