Listar Comunicaciones y ponencias de congresos DIEE - IEES Biltzarretako komunikazioak eta txostenak por título
Mostrando ítems 69-88 de 191
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Enhanced tolerance to pulse extinction ratio in Brillouin optical time domain analysis sensors by dithering of the optical source
Iribas Pardo, Haritz
; Urricelqui Polvorinos, Javier ; Sagüés García, Mikel ; Loayssa Lara, Alayn (SPIE, 2015)
Contribución a congreso / Biltzarrerako ekarpena 
We demonstrate the relaxation of the stringent requirements placed on the pulse extinction ratio in long-range Brillouin optical time-domain analysis sensors (BOTDA) by modulating the wavelength of the laser source that ... -
Enhancement of signal-to-noise ratio in Brillouin optical time domain analyzers by dual-probe detection
Iribas Pardo, Haritz ; Loayssa Lara, Alayn ; Sauser, Florian; Llera, Miguel; Le Floch, Sébastien (SPIE, 2017)
Contribución a congreso / Biltzarrerako ekarpena
We demonstrate a simple technique to enhance the signal-to-noise ratio (SNR) in Brillouin optical time-domain analysis sensors by the addition of gain and loss processes. The technique is based on the shift of the pump ... -
Enhancement of the power radiated by a dipole antenna at boresight by means of a left handed superstrate
Sáenz Sáinz, Elena; Ederra Urzainqui, Íñigo ; Gonzalo García, Ramón ; Maagt, Peter de (IEEE, 2006)
Contribución a congreso / Biltzarrerako ekarpena
In this paper a comparison between the measured radiation performances of a single dipole and a dipole with a left handed superstrate based on a finite periodic repetition of a unit cell is presented. First of all the ... -
Enhancing the infrared and visible emission properties of calcium silicate hydrate for radiative cooling using metamaterials
Lezaun Capdevila, Carlos; Dolado, J. S.; Torres García, Alicia E. ; Pérez Escudero, José Manuel ; Liberal Olleta, Íñigo ; Beruete Díaz, Miguel (IEEE, 2022)
Contribución a congreso / Biltzarrerako ekarpena
Two periodic structures composed of metal cylinders with different orientations are used to improve the solar reflection of calcium silicate hydrate (CSH) while maintaining its atmospheric emission. Interesting effects ... -
Estado del arte de las antenas que combinan corrugaciones horizontales y verticales
Teniente Vallinas, Jorge ; Gonzalo García, Ramón ; Río Bocio, Carlos del (2005)
Contribución a congreso / Biltzarrerako ekarpena
In the present paper the state of the art, possibilities, advantages and disadvantages of the patented corrugated horn antennas that combine horizontal and vertical corrugations is being covered. These rather new type and ... -
Estudio de la posibilidad de utilizar modos de orden superior en guías de onda cuasi-ópticas
Río Bocio, Carlos del ; Gonzalo García, Ramón ; Marín Pilz, Miguel ; Sorolla Ayza, Mario ; Möbius, Arnold; Thumm, Manfred (1995)
Contribución a congreso / Biltzarrerako ekarpena
The possibility to employ low power gyrotron tubes (10-30 kW, CW) at millimeter wave frequencies (30-100 GHz) has potential applications in advanced ceramic sintering, surface coating, radar, remote sensing, etc.. In ... -
Estudio de resonancias parásitas en antenas corrugadas
Teniente Vallinas, Jorge ; Gonzalo García, Ramón ; Río Bocio, Carlos del (2001)
Contribución a congreso / Biltzarrerako ekarpena
A theoretical study reinforced with practical measurements about the origin of the return loss spikes in corrugated horn antennas is presented in this paper. These spikes are directly related to the periodic structure ... -
Etched and nanocoated SMS fiber sensor for detection of salinity concentration
Cardona-Maya, Yamile; Del Villar, Ignacio ; Socorro Leránoz, Abián Bentor ; Corres Sanz, Jesús María ; Arregui San Martín, Francisco Javier ; Botero-Cadavid, Juan F. (MDPI, 2017)
Contribución a congreso / Biltzarrerako ekarpena
An optical fibre refractometer has been developed by etching and deposition of a thin film of indium tin oxide (ITO) on a single-mode-multimode-single-mode (SMS) fibre structure. The interference between modes in this ... -
Evalución de dosimetría de campos electromagnéticos en el entorno interior doméstico
Esparza Alfaro, Fermín; Carranza, Noemí; Torres Landívar, Víctor ; Falcone Lanas, Francisco Javier ; Ramos González, Victoria (2009)
Contribución a congreso / Biltzarrerako ekarpena
In this work, the evaluation of radiofrequency exposure in a domestic environment is analyzed. 3D raytracing simulation results are compared with dossimetry measurement results in a probe household in a dense urban area ... -
Experimental study of the antenna influence in RTLS based-on RFID
Crespo López, Gonzalo; Teniente Vallinas, Jorge ; Ederra Urzainqui, Íñigo ; Gonzalo García, Ramón (IEEE, 2012)
Contribución a congreso / Biltzarrerako ekarpena
Nowadays Real-time localization systems (RTLS) are growing up very quickly but there are some remaining issues which need to be analyzed. This paper presents an experimental study that shows how different kind of antennas can ... -
Fiber-optic immunosensor based on lossy mode resonances induced by indium tin oxide thin-films
Socorro Leránoz, Abián Bentor ; Del Villar, Ignacio ; Corres Sanz, Jesús María ; Arregui San Martín, Francisco Javier ; Matías Maestro, Ignacio (IEEE, 2017)
Contribución a congreso / Biltzarrerako ekarpena
A novel immunosensor based on lossy mode resonances (LMRs) induced in optical fibers is developed in this contribution. Indium tin oxide (ITO) is sputtered on the optical substrate to generate an LMR in the transmission ... -
Fiber-optic lossy mode resonance sensors
Arregui San Martín, Francisco Javier ; Del Villar, Ignacio ; Corres Sanz, Jesús María ; Goicoechea Fernández, Javier ; Ruiz Zamarreño, Carlos ; Elosúa Aguado, César ; Hernáez Sáenz de Zaitigui, Miguel ; Rivero Fuente, Pedro J. ; Socorro Leránoz, Abián Bentor ; Urrutia Azcona, Aitor ; Sánchez Zábal, Pedro ; Zubiate Orzanco, Pablo ; López Torres, Diego ; Acha Morrás, Nerea de ; Matías Maestro, Ignacio (Elsevier, 2014)
Contribución a congreso / Biltzarrerako ekarpena
In the last 4 years, experimental evidences about the potential use of optical sensors based on Lossy Mode Resonances (LMR) have been presented in the literature. These LMR sensors have some similarities with Surface ... -
Gain dependence of measured spectra in coherent Brillouin optical time-domain analysis sensors
Mariñelarena Ollacarizqueta, Jon ; Urricelqui Polvorinos, Javier ; Loayssa Lara, Alayn (SPIE, 2016)
Contribución a congreso / Biltzarrerako ekarpena
We report on the effects of large pump pulse powers on Brillouin optical time-domain analysis (BOTDA) sensors based on phase-modulated probe wave and coherent detection. It is found that the large Brillouin gain that comes ... -
Gaussian beam propagation versus Huygens method in non-paraxial conditions
Gonzalo García, Ramón ; Turullols, Pedro; Río Bocio, Carlos del ; Sorolla Ayza, Mario (1997)
Contribución a congreso / Biltzarrerako ekarpena
In this paper, we present a study about the difference between Gaussian beam propagation and Huygens method to obtain the radiation pattern in the case of non-paraxial conditions. We fix a way to determine the error in the ... -
Gaussian profiled horn antennas
Gonzalo García, Ramón ; Teniente Vallinas, Jorge ; Río Bocio, Carlos del (1999)
Contribución a congreso / Biltzarrerako ekarpena
In many different applications parameters such efficiency, gain, directivity, etc., are really critical. By using the Gaussian techniques presented here, the radiating features of existing horn antenna systems can be ... -
Generación del modo HE11 a partir de una guía circular lisa monomodo
Gonzalo García, Ramón ; Río Bocio, Carlos del ; Teniente Vallinas, Jorge ; Sorolla Ayza, Mario (1996)
Contribución a congreso / Biltzarrerako ekarpena
In this paper, we present an original taper design to obtain the HE11 corrugated circular waveguide mode exciting with a pure TE11 monomode smooth circular waveguide mode. The proposed corrugated taper has a longitudinal ... -
A general beam-forming network made with CORPS
Betancourt Quiñones, Diego; Río Bocio, Carlos del (2006)
Contribución a congreso / Biltzarrerako ekarpena
A new beam-forming network concept is introduced. This network is based in the design principles of CORPS. The new proposed structure presents an improvement in design over the traditional beam-forming network since, ... -
Generation of the HE11 mode from monomode smooth circular waveguide
Gonzalo García, Ramón ; Río Bocio, Carlos del ; Sorolla Ayza, Mario (1996)
Contribución a congreso / Biltzarrerako ekarpena
In this paper, we present an original taper design to obtain the HE11 corrugated circular waveguide mode exciting with a pure TE11 monomode smooth circular waveguide mode. The proposed corrugated taper has a longitudinal ... -
Generation of the HE11 mode in rectangular waveguide using gaussian techniques
Teniente Vallinas, Jorge ; Gonzalo García, Ramón ; Sorolla Ayza, Mario ; Río Bocio, Carlos del (IEEE, 1999)
Contribución a congreso / Biltzarrerako ekarpena
A new and efficient design of a rectangular corrugated waveguide mode converter, from TE10 mode in a smooth rectangular monomode waveguide to HE11 mode in a corrugated rectangular waveguide, is proposed. The main idea ... -
Glottal spectrum based inverse filtering
Arroabarren Alemán, Ixone; Carlosena García, Alfonso (ISCA, 2003)
Contribución a congreso / Biltzarrerako ekarpena
In this paper a new inverse filtering technique for the time-domain estimation of the glottal excitation is presented. This approach uses the DAP modeling for the vocal tract characterization, and a spectral model for the ...
