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Etayo Salinas, David

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Etayo Salinas

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David

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Ingeniería Eléctrica y Electrónica

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9058

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2008 - 200912010 - 20194
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Now showing 1 - 5 of 5
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    PublicationOpen Access
    Low profile THz periodic leaky-wave antenna
    (IEEE, 2014) Beaskoetxea Gartzia, Unai; Beruete Díaz, Miguel; Rodríguez Ulibarri, Pablo; Etayo Salinas, David; Sorolla Ayza, Mario; Navarro Cía, Miguel; Zehar, Mokhtar; Blary, Karine; Chahadih, Abdallah; Han, Xiang-Lei; Akalin, Tahsin; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    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 and no significant differences when compared with a typical square corrugation profile. Numerical comparison is also made for the designed and manufactured antennas. High transmission enhancement in the corrugated case is obtained, compared to that given by a single central slot with no grooves. This kind of antennas finds several applications in different frequency ranges, including the nowadays high-interest range of the THz.
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    PublicationOpen Access
    Compact dual-band terahertz quarter-wave plate metasurface
    (IEEE, 2014) Torres Landívar, Víctor; Etayo Salinas, David; Ortuño Molinero, Rubén; Navarro Cía, Miguel; Beruete Díaz, Miguel; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    A dual-band quarter-wave plate based on a modified extraordinary transmission hole array is numerically analyzed and experimentally demonstrated at terahertz frequencies. To control independently orthogonal polarizations, the original square holes are connected with vertical slits and their lateral straight sides are replaced by meander lines. This smart design enables dual-band operation with unprecedented fractional bandwidths in a compact structure. Considering a flattening deviation lower than 40% of the optimum value, a fractional bandwidth of 53.8% and 3.8% is theoretically obtained (16.8% and 2.9% in the experiment) at 1 and 2.2 THz, respectively. At these two frequencies, the structure is 0.13-λ and 0.29-λ thick, respectively. Given the compactness of the whole structure and the performance obtained, this quarter-wave plate is presented as a competitive device for the terahertz band.
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    PublicationRestricted
    Estudio de una estructura tipo Chess-Board con combinación de AMCS para disminución de la RCS en una aplicación Broadband
    (2008) Etayo Salinas, David; Escuela Técnica Superior de Ingenieros Industriales y de Telecomunicación; Telekomunikazio eta Industria Ingeniarien Goi Mailako Eskola Teknikoa
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    PublicationOpen Access
    New developments in the THz field for imaging applications
    (2014) Etayo Salinas, David; Gonzalo García, Ramón; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
    Con esta tesis se pretende avanzar en el desarrollo de la tecnología de terahercios (THz) dentro del campo de las aplicaciones de imagen. Actualmente, los THz se presentan como un rango frecuencial muy interesante para la obtención de imágenes, tal y como se ve reflejado en los numerosos trabajos presentes en la literatura. Por otro lado, aunque se han obtenido cuantiosas imágenes en este rango, aun no es posible identificar el material que compone la muestra. Es por esto que uno de los objetivos de esta tesis es completar las bases de datos de materiales existentes actualmente. Para ello, se han implementado diferentes sistemas que permiten la caracterización electromagnética de diferentes materiales en el rango de los THz.
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    PublicationOpen Access
    Mapping the conductivity of graphene with electrical resistance tomography
    (Nature Research, 2019) Cultrera, Alessandro; Serazio, Danilo; Zurutuza, Amaia; Centeno, Alba; Txoperena, Ohiana; Etayo Salinas, David; Cordón, Álvaro; Redo Sánchez, Albert; Arnedo Gil, Israel; Ortolano, Massimo; Callegaro, Luca; Ingeniería Eléctrica, Electrónica y de Comunicación; Ingeniaritza Elektrikoa, Elektronikoaren eta Telekomunikazio Ingeniaritzaren
    Electronic applications of large-area graphene films require rapid and accurate methods to map their electrical properties. Here we present the first electrical resistance tomography (ERT) measurements on large-area graphene samples, obtained with a dedicated measurement setup and reconstruction software. The outcome of an ERT measurement is a map of the graphene electrical conductivity. The same setup allows to perform van der Pauw (vdP) measurements of the average conductivity. We characterised the electrical conductivity of chemical-vapour deposited graphene samples by performing ERT, vdP and scanning terahertz time-domain spectroscopy (TDS), the last one by means of a commercial instrument. The measurement results are compared and discussed, showing the potential of ERT as an accurate and reliable technique for the electrical characterization of graphene samples.