Listar Artículos de revista DIEC - IEKS Aldizkari artikuluak por título

UAVradio: Radio link path loss estimation for UAVs

Aláez Gómez, Daniel; Celaya Echarri, Mikel; Azpilicueta Fernández de las Heras, Leyre

; Villadangos Alonso, Jesús

(Elsevier, 2024) Artículo / Artikulua

The UAVRadio Python module is a comprehensive toolkit designed to facilitate the analysis and prediction of radio signal path loss in Unmanned Aerial Vehicle (UAV) communication scenarios. The module encompasses a range ...

Ultra-low frequency multidirectional harvester for wind turbines

Castellano Aldave, Jesús Carlos; Carlosena García, Alfonso

; Iriarte Goñi, Xabier

; Plaza Puértolas, Aitor

(Elsevier, 2023) Artículo / Artikulua

In this paper we propose, and demonstrate through a prototype, a completely novel device able to harvest mechanical energy from the multidirectional vibrations in a wind turbine, and convert it into electrical, to power ...

Ultrahigh refractive index sensitivity with lossy mode resonance in a side-polished low-index polymer optical fiber

López Vargas, Juan David; Matías Maestro, Ignacio

; Werneck, Marcelo M.; Allil, Regina C.; Del Villar, Ignacio

(IEEE, 2024) Artículo / Artikulua

This work presents a theoretical–experimental study of a refractive index (RI) sensor based on lossy mode resonances (LMRs) generated with a side-polished low-index polymer optical fiber. The theoretical part involves ...

Ultrathin and high-efficiency Pancharatnam-Berry phase metalens for millimeter waves

Moreno-Peñarrubia, Alexia; Teniente Vallinas, Jorge

; Kuznetsov, Sergei A.; Orazbayev, Bakhtiyar

; Beruete Díaz, Miguel

(AIP Publishing, 2021) Artículo / Artikulua

Applying the Pancharatnam–Berry (PB) principle to half-wave plate (HWP) metasurfaces allows the manipulation of wavefronts along with the conversion of the handedness of circularly polarized incident waves by simply rotating ...

Ultrathin sub-terahertz half-wave plate with high conversion efficiency based on zigzag metasurface

Moreno-Peñarrubia, Alexia; Kuznetsov, Sergei A.; Beruete Díaz, Miguel

(IEEE, 2020) Artículo / Artikulua

In this communication, an ultrathin transmissive half-wave plate (HWP) based on a bi-layered zigzag metasurface operating at the lower frequency edge of the terahertz (THz) spectrum is numerically and experimentally studied. ...

UV light detection with side polished CYTOP fiber

Ayechu Abendaño, Ada; Santano, Desiree

; López Vargas, Juan David; Matías Maestro, Ignacio

; Del Villar, Ignacio

(IEEE, 2023) Artículo / Artikulua

Cyclic transparent optical polymer (CYTOP) fiber, used mainly in strain detection and refractive index characterization of liquids, can be polished for the detection of ultraviolet (UV) light radiation. The study investigates ...

Validation of 3D simulation tool for radio channel modeling at 60 GHz: a meeting point for empirical and simulation-based models

Celaya Echarri, Mikel

; Azpilicueta Fernández de las Heras, Leyre

; López Iturri, Peio

; Falcone Lanas, Francisco Javier

; García Sánchez, Manuel; Vázquez Alejos, Ana (Elsevier, 2020) Artículo / Artikulua

The radio channel modelling of the millimeter wave bands for the fifth generation of wireless mobile communications, appears as a challenge for both empirical and simulation approaches. In this paper we discuss the use of ...

Validation of HTTP response time from network traffic as an alternative to web browser instrumentation

López Romera, Carlos

; Morató Osés, Daniel

; Magaña Lizarrondo, Eduardo

; Izal Azcárate, Mikel

(IEEE, 2021) Artículo / Artikulua

The measurement of response time in hypertext transfer protocol (HTTP) requests is the most basic proxy measurement method for evaluating web browsing quality. It is used in the research literature and in application ...

Validation of the filling factor index to study the filling process of the sEMG signal in the quadriceps

Rodríguez Falces, Javier

; Malanda Trigueros, Armando; Mariscal Aguilar, Cristina; Niazi, Imran Khan; Navallas Irujo, Javier (Elsevier, 2023) Artículo / Artikulua

Introduction: The EMG filling factor is an index to quantify the degree to which an EMG signal has been filled. Here, we tested the validity of such index to analyse the EMG filling process as contraction force was ...

Valorization of insulation cellulose waste as solid biomass fuel

Espuelas Zuazu, Sandra

; Marcelino Sádaba, Sara

; Castillo, Jesús María del

; García, Beñat; Seco Meneses, Andrés

(MDPI, 2021) Artículo / Artikulua

This paper investigates the ability of insulation cellulose fiber powder (CFP) to be pelletized for its valorization as biomass fuel. CFP is a waste originating from insulation cellulose manufacturing that lacks any method ...

Vertically coupled InP/InGaAsP microring lasers using a single epitaxial growth and singleside lithography

García López, Óscar; Thourhout, Dries Van; Verstuyft, Steven; López-Amo Sáinz, Manuel

; Baets, Roel; Galarza Galarza, Marko

(IEEE, 2020) Artículo / Artikulua

The experimental demonstration of vertical microring lasers requiring only one single epitaxial growth and two single-side lithographic steps is presented, in what is the simplest fabrication scheme for such devices published ...

Very-low frequency capacitively coupled AC amplifier with a current feedback operational amplifier

Beloso Legarra, Javier

; Cruz Blas, Carlos Aristóteles de la

; Carlosena García, Alfonso

; Martincorena Arraiza, Maite

(Wiley, 2023) Artículo / Artikulua

In this paper, we propose the idea of using transimpedance amplifiers, in lieu of operational amplifiers (OAs) or transconductance amplifiers (OTAs) to design capacitively coupled AC amplifiers. The idea is demonstrated ...

Virtual antenna array for reduced energy per bit transmission at Sub-5 GHz mobile wireless communication systems

Alibakhshikenari, Mohammad; Virdee, Bal S.; Mariyanayagam, Dion; García Zuazola, Ignacio Julio; Benetatos, Harry; Althuwayb, Ayman Abdulhadi; Alali, Bader; Xu, Kai-Da; Falcone Lanas, Francisco Javier

(Elsevier, 2023) Artículo / Artikulua

This paper presents an innovative technique to synthesize a virtual antenna array (VAA) that consumes less energy than conventional antenna arrays that are used in mobile communications systems. We have shown that for a ...

Virtual FBGs using saturable absorbers for sensing with fiber lasers

Rodríguez Cobo, Luis; Pérez Herrera, Rosa Ana

; Quintela, M. A.; Ruiz Lombera, Rubén; López-Amo Sáinz, Manuel

; López Higuera, José Miguel (MDPI, 2018) Artículo / Artikulua

The spectral narrowing of Fiber Bragg Gratings (FBGs) introduced by unpumped Er-doped fiber (EDF) was analyzed for fiber lasers (FL). Owing to spatial hole burning (SHB), the spectral response of a virtual FBG can be ...

A water content continuous monitoring of grapevine xylem tissue using a portable low-power cost-effective FMCW radar

Quemada Mayoral, Carlos

; García González, Cebrián

; Iriarte Galarregui, Juan Carlos

; Marín Ederra, Diana

; Gastón Beraza, Diego; Miranda Jiménez, Carlos

; Gonzalo García, Ramón

; Maestrojuán Biurrun, Itziar

; Santesteban García, Gonzaga

; Ederra Urzainqui, Íñigo

(IEEE, 2019) Artículo / Artikulua

This paper presents the real-time monitoring of a grapevine’s water content that flows up through the xylem tissue by means of a frequency-modulated continuous-wave (FMCW) radar. The application of an optimization process, ...

Watt-level green random laser at 532 nm by SHG of Yb-doped fiber laser

Rota Rodrigo, Sergio

; Gouhier, B.; Dixneuf, C.; Antoni Micollier, L.; Guiraud, G.; Leandro González, Daniel

; López-Amo Sáinz, Manuel

; Traynor, N.; Santarelli, Giorgio (Optical Society of America, 2018) Artículo / Artikulua

We have developed a Watt-level random laser at 532 nm. The laser is based on a 1064 nm random distributed ytterbium-gain assisted fiber laser seed with a 0.35 nm line-width and 900 mW polarized output power. A study for ...

Wavelength and intensity based lossy mode resonance breathing sensor

Bohórquez Navarro, Dina Luz

; Del Villar, Ignacio

; Corres Sanz, Jesús María

; Matías Maestro, Ignacio

(Elsevier, 2021) Artículo / Artikulua

Copper oxide (CuO) allows the generation of lossy mode resonance (LMR) in a wide wavelength range of the optical spectrum, both in the visible and the near-infrared (NIR). For this, it is necessary to use a configuration ...

Wavelength converter using a highly Er-doped optical fiber ring laser

Pérez Herrera, Rosa Ana

; López-Amo Sáinz, Manuel

; Rodríguez, Luis; Ventura Rípodas, Daniel; López Higuera, José Miguel (IOP Publishing, 2018) Artículo / Artikulua

This work presents an all-fiber wavelength converter based on a highly Er-doped fiber laser, which has been experimentally demonstrated. Frequencies from several kilohertz up to tens of gigahertz have been investigated. ...

Wavelength-switchable L-band fiber laser assisted by random reflectors

Pérez Herrera, Rosa Ana

; Roldán Varona, Pablo; Sánchez-González, Arturo; Rodríguez Cobo, Luis; López Higuera, José Miguel; López-Amo Sáinz, Manuel

(EDP Open, 2023) Artículo / Artikulua

A wavelength-switchable L-band erbium-doped fiber laser (EDFL) assisted by an artificially controlled backscattering (ACB) fiber reflector is here presented. This random reflector was inscribed by femtosecond (fs) laser ...

Winding resistance measurement in power inductors - understanding the impact of the winding mutual resistance

Barrios Rípodas, Ernesto

; Elizondo Martínez, David

; Ursúa Rubio, Alfredo

; Sanchis Gúrpide, Pablo

(IEEE, 2021) Artículo / Artikulua

Inductors are cornerstone components in power electronics converters. Since winding loss is the dominant loss mechanism in these components, its accurate measurement is fundamental for the validation of the inductor's ...