• Filtro paso banda en tecnología groove gap waveguide con altura de pines reducida para facilitar su fabricación 

  Santiago Arriazu, David; Gómez Laso, Miguel Ángel  ; Lopetegui Beregaña, José María; Arregui Padilla, Iván   (Universidad de Málaga, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  In this work, a novel topology of groove gap waveguide (GGW) technology is presented to facilitate the fabrication process by Computer Numerical Control (CNC) milling. GGW has been proposed as an interesting alternative ...

• Aluminum coated fiber optic sensor for enhancing flow rate measurement 

  Rodríguez Rodríguez, Armando; Urroz Unzueta, José Carlos  ; Diéguez Elizondo, Pedro  ; Bravo Acha, Mikel  ; López-Amo Sáinz, Manuel  ; López Rodríguez, José Javier   (SPIE, 2023)   Contribución a congreso / Biltzarrerako ekarpena  

  A water flow and velocity aluminum-coated Fiber Bragg Grating sensor system for open channels was designed, simulated and tested. The sensing head was designed, ruggedized and customized to measure velocities at ...

• Development of a water flow and velocity optical fiber sensor for field testing 

  Rodríguez Rodríguez, Armando; Urroz Unzueta, José Carlos  ; Diéguez Elizondo, Pedro  ; Bravo Acha, Mikel  ; López-Amo Sáinz, Manuel  ; López Rodríguez, José Javier   (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena

  A water flow and velocity fiber optic sensor system was developed and tested. The sensing head was especially developed and ruggedized to measure velocities at different depths, in order to calculate the discharge in channels.

• Noise in coherently radiating periodic structures beam forming networks 

  Biurrun Quel, Carlos  ; Río Bocio, Carlos del   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  Following the noise wave theory, beam forming networks based on Coherently Radiating Periodic Structures (CORPS-BFN) are analysed and proven to be capable of enhancing the Signal to Noise Ratio of the system by analogically ...

• Evolutionary algorithms applied to multi-layered radiative cooling metamaterials 

  Lezaun Capdevila, Carlos; Jorajuría, Tania  ; Torres García, Alicia E.  ; Herrera, Pilar; Beruete Díaz, Miguel   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  A newly design method for designing multi-layered radiative cooling metamaterials based on genetic algorithms (GAs) is exposed. The developed GA has been tested in three cases, resulting in three different structures that ...

• Ordered titanium dioxide nanotubes for lossy-mode resonance-based humidity sensing 

  Pitula, Emil; Kouao, Dujearic-Stephane; Grochowska, Katarzyna; Sezemsky, Petr; Simerova, Radka; Domínguez Rodríguez, Ismel  ; Siuzdak, Katarzyna; Del Villar, Ignacio  ; Stranak, Vitezslav; Smietana, Mateusz (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena

  Ordered titanium dioxide nanotubes on indium tin oxide as a structure supporting lossy-mode resonance is reported. Capability for application of the structure for optical humidity sensing is shown as an application example.

• Long-range and high-resolution traffic monitoring based on pulse-compression DAS and advanced vehicle tracking algorithm 

  Corera Orzanco, Íñigo  ; Piñeiro Ben, Enrique; Navallas Irujo, Javier; Sagüés García, Mikel  ; Loayssa Lara, Alayn (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena

  We demonstrate traffic monitoring over tens of kilometres of road using an enhanced distributed acoustic sensing system based on optical pulse compression and a novel transformed-domain-based processing scheme with enhanced ...

• Bloch surface wave resonances generated with dielectric stack of high refractive index contrast deposited on a D-shaped optical fiber for sensing applications 

  Del Villar, Ignacio  ; Kwietniewski, Norbert; Gonzalez-Valencia, Esteban; Burnat, Dariusz; Armas, Dayron; Pitula, Emil; Matías Maestro, Ignacio  ; Chiavaioli, Francesco; Torres, Pedro; Smietana, Mateusz (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena

  A 5-layer stack composed of TiO2 and Al2O3, two materials with a high refractive index contrast, was deposited on a D-shaped fiber to generate Bloch surface wave resonances with an improved figure of merit.

• Narrowband and spectrally robust thermal emission from metallic thin films on top of epsilon-near-zero substrates 

  Navajas Hernández, David ; Pérez Escudero, José Manuel  ; Liberal Olleta, Íñigo   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  The absorption and emission of infrared radiation by ultra-thin metallic films is a key element in several thermal engineering applications such as heat and energy management, and thermal camouflage. However, ultra-thin ...

• Quasi-distributed vibration analysis of a cantilever beam using OFDR and weak reflectors 

  Leandro González, Daniel  ; Zhu, Mengshi; Wada, Daichi; Kasai, Tokio; Igawa, Hirotaka; López-Amo Sáinz, Manuel  ; Murayama, Hideaki (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena

  This work evaluates the performance of a quasi-distributed in-line velocimeter based on OFDR and weak reflectors to measure vibration every 10 cm, using a cantilever beam under free-end damping and during an impact-hammer test.

• Compensation of phase-noise in pulse-compression phase-sensitive OTDR sensors 

  Piñeiro Ben, Enrique; Sagüés García, Mikel  ; Eyal, Avishay; Loayssa Lara, Alayn (Optica Publishing Group, 2022)   Contribución a congreso / Biltzarrerako ekarpena

  We introduce a technique to compensate the performance impairments due to the laser phase noise in long-range pulse-compression DAS sensors. Experiments demonstrate the use of the longest duration pulse compression waveform ...

• Compact pillbox reflector based on geodesic lens 

  Pérez Quintana, Dayan; Chen, Q.; Beruete Díaz, Miguel  ; Quevedo-Teruel, O. (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  We propose a pillbox antenna in combination with a geodesic lens at 60 GHz. The antenna is implemented in a dual-layer parallel plate waveguide. The waves from a geodesic lens in a first layer, after being reflected by a ...

• Hyperbolic lens antenna in groove gap waveguide technology at sub-millimeter waves 

  Pérez Quintana, Dayan; Biurrun Quel, Carlos  ; Ederra Urzainqui, Íñigo  ; González-Ovejero, David; Beruete Díaz, Miguel   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  In this paper, a flat hyperbolic lens antenna using Groove Gap Waveguide (GGW) technology is designed at 300 GHz. A GGW horn antenna is used to feed the metamaterial lens placed in a parallel plate waveguide (PPW), in order ...

• Performance evaluation of spatial modulation patterns in compressive sensing terahertz imaging 

  Ndagijimana, Adolphe; Heredia Conde, Miguel; Ederra Urzainqui, Íñigo   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  Terahertz (THz) imaging traditionally uses pixel-to-pixel mechanical raster scanning, which is slow and limits the resolution and potential applications. Compressive Sensing Terahertz (CS-THz) imaging has the potential to ...

• Alfalfa quality detection by means of VIS-NIR optical fiber reflection spectroscopy 

  Ruiz Zamarreño, Carlos  ; Gracia Moisés, Ander; Vitoria Pascual, Ignacio  ; Imas González, José Javier  ; Castaño Egues, Lorena Yveth; Avedillo, A.; Matías Maestro, Ignacio   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  A first approach study for the classification of alfalfa (medicago sativa) quality has been performed by means of VIS-NIR optical fiber reflection spectroscopy. Reflection spectral data has been obtained from alfalfa samples ...

• Low-voltage CMOS bulk-driven buffer with bootstrapping technique for gain enhancement and THD-noise reduction 

  Cruz Blas, Carlos Aristóteles de la  ; Carrillo, Juan M. (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  In this paper, a bootstrapping technique is applied to a bulk-driven voltage buffer for canceling the gate-source transconductance in order to improve the cell gain, the linearity and reduce the input-referred noise. The ...

• Design alternatives for a submm-wave Fabry-Perot cavity antenna 

  Platero Rodrigo, Naiara; Iriarte Galarregui, Juan Carlos  ; Ederra Urzainqui, Íñigo   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  This paper discusses different design alternatives for a high gain planar antenna at 240 GHz. The antenna is based on a Fabry-Perot configuration, where two different partial reflection surfaces (PRS) are considered: a ...

• On the technical reliability of lithium-ion batteries in a zero emission polar expedition 

  Soto Cabria, Adrián  ; Berrueta Irigoyen, Alberto  ; Sanchis Gúrpide, Pablo  ; Ursúa Rubio, Alfredo  ; Oficialdegui, Ignacio (IEEE, 2020)   Contribución a congreso / Biltzarrerako ekarpena  

  This contribution presents a technical analysis of the Lithium-ion batteries (LIBs) used in the WindSled project. In this project, an expedition has been carried out by means of a 0-emission vehicle that have covered more ...

• Inverter-based PV ramp-rate limitation strategies: minimizing energy losses 

  González Moreno, Alejandro; Marcos Álvarez, Javier  ; Parra Laita, Íñigo de la  ; Marroyo Palomo, Luis   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  This work analyzes the reduction of power generation in strategies that regulate the PV ramp-rate by using inverter limitation. Although the operating principle implies some energy production losses, not all these ...

• Comparison of a slotted SIW antenna covered with metasurface vs. a traditional array 

  Chocarro Álvarez, Javier; Pérez Escudero, José Manuel  ; Ederra Urzainqui, Íñigo   (IEEE, 2022)   Contribución a congreso / Biltzarrerako ekarpena  

  In this article we compare two solutions to improve the radiation pattern of a slotted Substrate Integrated Waveguide (SIW) antenna: use of an E-plane array and covering it with a metasurface (MTS). To this aim, we compare ...

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