• 3D-printed 96 GHz bull’s-eye antenna with off-axis beaming 

      Beaskoetxea Gartzia, Unai; Maci, Stefano; Navarro Cía, Miguel; Beruete Díaz, Miguel (IEEE, 2017)   Artículo / Artikulua
      Reducing the profile, footprint and weight of antennas embarked on aircrafts, drones or satellites has been a long pursued objective. Here we tackle this issue by developing a millimeter-wave 96 GHz elliptical Bull’s-Eye ...
    • Accurate circuit modeling of fishnet structures for negative-index-medium applications 

      Torres Landívar, Víctor; Mesa, Francisco; Navarro Cía, Miguel; Rodríguez Berral, Raúl; Beruete Díaz, Miguel; Medina, Francisco (IEEE, 2016)   Artículo / Artikulua
      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 ...
    • All-dielectric periodic terajet waveguide using an array of coupled cuboids 

      Minin, Igor V.; Minin, Oleg V.; Pacheco Peña, Víctor; Beruete Díaz, Miguel (AIP Publishing, 2015)   Artículo / Artikulua
      In this paper, the recently proposed technique to produce photonic jets (terajets at terahertz (THz) frequencies) using 3D dielectric cuboids is applied in the design of a mesoscale cuboid-chain wave- guide. The chains are ...
    • Analysis and description of HOLTIN service provision for AECG monitoring in complex indoor environments 

      Led Ramos, Santiago; Azpilicueta Fernández de las Heras, Leyre; Aguirre Gallego, Erik; Martínez de Espronceda Cámara, Miguel; Serrano Arriezu, Luis Javier; Falcone Lanas, Francisco Javier (MDPI, 2013)   Artículo / Artikulua
      In this work, a novel ambulatory ECG monitoring device developed in-house called HOLTIN is analyzed when operating in complex indoor scenarios. The HOLTIN system is described, from the technological platform level to its ...
    • Analysis of wireless sensor network topology and estimation of optimal network deployment by deterministic radio channel characterization 

      Aguirre Gallego, Erik; López Iturri, Peio; Azpilicueta Fernández de las Heras, Leyre; Astrain Escola, José Javier; Villadangos Alonso, Jesús; Falcone Lanas, Francisco Javier (MDPI, 2015)   Artículo / Artikulua
      One of the main challenges in the implementation and design of context-aware scenarios is the adequate deployment strategy for Wireless Sensor Networks (WSNs), mainly due to the strong dependence of the radiofrequency ...
    • An antibacterial coating based on a polymer/sol-gel hybrid matrix loaded with silver nanoparticles 

      Rivero Fuente, Pedro José; Urrutia Azcona, Aitor; Goicoechea Fernández, Javier; Ruiz Zamarreño, Carlos; Arregui San Martín, Francisco Javier; Matías Maestro, Ignacio (Springer, 2011)   Artículo / Artikulua
      In this work a novel antibacterial surface composed of an organic-inorganic hybrid matrix of tetraorthosilicate and a polyelectrolyte is presented. A precursor solution of tetraethoxysilane (TEOS) and poly(acrylic acid ...
    • Application of gold complexes in the development of sensors for volatile organic compounds 

      Luquin, Asunción; Elosúa Aguado, César; Vergara, Elena; Estella, Juncal; Cerrada, Elena; Bariáin Aisa, Cándido; Matías Maestro, Ignacio; Garrido Segovia, Julián José; Laguna, Mariano (World Gold Council, 2007)   Artículo / Artikulua
      Two different kinds of sensors have been developed by using the same kind of vapochromic complexes. The vapochromic materials [Au2Ag2(C6F5)(4)L-2](n) have different colours depending on the ligand L. These materials change, ...
    • Application of remote power-by-light switching in a simplified BOTDA sensor network 

      Bravo Acha, Mikel; Zornoza Indart, Ander; Loayssa Lara, Alayn; López-Amo Sáinz, Manuel; López Higuera, José Miguel; Ullán Nieto, Angel (MDPI, 2013)   Artículo / Artikulua
      We propose and demonstrate the use of spatial multiplexing as a means to reduce the costs of distributed sensing networks. We propose a new scheme in which remote power-by-light switching is deployed to scan multiple ...
    • BOTDA measurements tolerant to non-local effects by using a phase-modulated probe wave and RF demodulation 

      Urricelqui Polvorinos, Javier; Sagüés García, Mikel; Loayssa Lara, Alayn (Optical Society of America, 2013)   Artículo / Artikulua
      We demonstrate a Brillouin optical time domain analysis sensor based on a phase modulated probe wave and RF demodulation that provides measurements tolerant to frequency dependent variations of the pump pulse power induced ...
    • Brillouin optical time-domain analysis sensor assisted by Brillouin distributed amplification of pump pulses 

      Urricelqui Polvorinos, Javier; Sagüés García, Mikel; Loayssa Lara, Alayn (Optical Society of America, 2015)   Artículo / Artikulua
      We demonstrate the extension of the measurement range of Brillouin optical time-domain analysis (BOTDA) sensors using a distributed Brillouin amplifier (DBA). The technique is based on injecting a DBA pump wave in the ...
    • Brillouin optical time-domain analysis sensor with pump pulse amplification 

      Mompó Roselló, Juan José; Urricelqui Polvorinos, Javier; Loayssa Lara, Alayn (Optical Society of America, 2016)   Artículo / Artikulua
      We demonstrate a simple technique to provide conventional Brillouin optical time-domain analysis sensors with mitigation for pump pulse attenuation. The technique is based on operating the sensor in loss configuration so ...
    • Broadband frequency and angular response of a sinusoidal bull’s eye antenna 

      Beaskoetxea Gartzia, Unai; Navarro Cía, Miguel; Beruete Díaz, Miguel (IOP Publishing, 2016)   Artículo / Artikulua
      A thorough experimental study of the frequency and beaming angle response of a metallic leaky-wave bull’s eye antenna working at 77 GHz with a sinusoidally corrugated profile is presented. The beam scanning property of ...
    • Characterization of wireless channel impact on wireless sensor network performance in public transportation buses 

      Azpilicueta Fernández de las Heras, Leyre; López Iturri, Peio; Aguirre Gallego, Erik; Astrain Escola, José Javier; Villadangos Alonso, Jesús; Zubiri Segura, Cristóbal; Falcone Lanas, Francisco Javier (IEEE, 2015)   Artículo / Artikulua
      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 ...
    • Chirping techniques to maximize the power-handling capability of harmonic waveguide low-pass filters 

      Teberio Berdún, Fernando; Arregui Padilla, Iván; Gómez Torrent, Adrián; Arnedo Gil, Israel; Chudzik, Magdalena; Zedler, Michael; Goertz, Franz-Josef; Jost, Rolf; Lopetegui Beregaña, José María; Gómez Laso, Miguel Ángel (IEEE, 2016)   Artículo / Artikulua
      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 ...
    • Comparative study of layer-by-layer deposition techniques for poly(sodium phosphate) and poly (allylamine hydrochloride) 

      Elosúa Aguado, César; López Torres, Diego; Hernáez Sáenz de Zaitigui, Miguel; Matías Maestro, Ignacio; Arregui San Martín, Francisco Javier (Springer, 2013)   info:eu-repo/semantics/article
      An inorganic short chain polymer, poly(sodium phosphate), PSP, together with poly(allylamine hydrochloride), PAH, is used to fabricate layer-by-layer (LbL) films. The thickness, roughness, contact angle, and optical ...
    • A comparative study of two different approaches for the incorporation of silver nanoparticles into layer-by-layer films 

      Rivero Fuente, Pedro José; Goicoechea Fernández, Javier; Matías Maestro, Ignacio; Arregui San Martín, Francisco Javier (Springer, 2014)   info:eu-repo/semantics/article
      In this work, a comparative study about the incorporation of silver nanoparticles (AgNPs) into thin films is presented using two alternative methods, the in situ synthesis process and the layer-by-layer embedding deposition ...
    • Converging biconcave metallic lens by double-negative extraordinary transmission metamaterial 

      Navarro Cía, Miguel; Beruete Díaz, Miguel; Sorolla Ayza, Mario; Campillo, Igor (AIP Publishing, 2009)   Artículo / Artikulua
      In this letter we present simulation and experimental results of a left-handed converging biconcave metallic lens made of stacked subwavelength hole arrays SSHAs working in the millimeter wave range with additional ...
    • Cost-effective Brillouin optical time-domain analysis sensor using a single optical source and passive optical filtering 

      Iribas Pardo, Haritz; Urricelqui Polvorinos, Javier; Mariñelarena Ollacarizqueta, Jon; Sagüés García, Mikel; Loayssa Lara, Alayn (Hindawi Publishing Corporation, 2016)   Artículo / Artikulua
      We present a simplified configuration for distributed Brillouin optical time-domain analysis sensors that aims to reduce the cost of the sensor by reducing the number of components required for the generation of the two ...
    • Cyclic coding for Brillouin optical time-domain analyzers using probe dithering 

      Iribas Pardo, Haritz; Loayssa Lara, Alayn; Sauser, Florian; Llera, Miguel; Le Floch, Sébastien (Optical Society of America, 2017)   Artículo / Artikulua
      We study the performance limits of mono-color cyclic coding applied to Brillouin optical time-domain analysis (BOTDA) sensors that use probe wave dithering. BOTDA analyzers with dithering of the probe use a dual-probe-sideband ...
    • Description of bow-tie nanoantennas excited by localized emitters using conformal transformation 

      Pacheco Peña, Víctor; Beruete Díaz, Miguel; Fernández Domínguez, Antonio I.; Luo, Yu; Navarro Cía, Miguel (American Chemical Society, 2016)   Artículo / Artikulua
      The unprecedented advance experienced by nano- fabrication techniques and plasmonics research over the past few years has made possible the realization of nanophotonic systems entering into the so-called strong coupling ...