• Gas sensor based on lossy mode resonances by means of thin graphene oxide films fabricated onto planar coverslips 

      Vitoria Pascual, Ignacio Upna Orcid; Gallego Martínez, Elieser Ernesto; Melendi Espina, Sonia; Hernáez Sáenz de Zaitigui, Miguel Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The use of planar waveguides has recently shown great success in the field of optical sensors based on the Lossy Mode Resonance (LMR) phenomenon. The properties of Graphene Oxide (GO) have been widely exploited in various ...
    • Impact of graphene monolayer on the performance of non-conventional silicon heterojunction solar cells with moox hole-selective contact 

      Ros, Eloi; Fernández, Susana; Ortega, Pablo; Taboada, Elena; Arnedo Gil, Israel; Gandía, José Javier; Voz, Cristóbal (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      In this work, a new design of transparent conductive electrode based on a graphene monolayer is evaluated. This hybrid electrode is incorporated into non-standard, high-efficiency crystalline silicon solar cells, where the ...
    • Performance analysis of a distributed optical fiber vibration sensor based on a sagnac interferometer 

      Ozcariz Celaya, Aritz Upna Orcid; Heim Weber, Guilherme; Fernandes Gomes, Danilo; Costa, Igor Brutkowski Vieira da; Galvão, José Rodolfo; Martins, Victor Matheus; Pipa, Daniel R.; Silva, Marco J. da; Cardozo da Silva, Jean Carlos; Ruiz Zamarreño, Carlos Upna Orcid; Martelli, Cicero (BMO/SBMag, 2023)   Artículo / Artikulua  OpenAccess
      In this work, measuring capabilities of a Sagnac Interferometer-based Distributed Optical Fiber Sensor (DOFS) system are demonstrated by comparing its results to a conventional amplitude-based Distributed Acoustic Sensing ...
    • Measurement of paracetamol concentration using an erbium-doped fiber ring cavity 

      Soares, Liliana; Pérez Herrera, Rosa Ana Upna Orcid; Novais, Susana; Ferreira, António; Silva, Susana; Frazão, Orlando (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      Process Analytical Technology (PAT) has been increasingly used in the pharmaceutical industry to monitor essential parameters in real-time during pharmaceutical processes. The concentration of Active Pharmaceutical Ingredients ...
    • Long-range traffic monitoring based on pulse-compression distributed acoustic sensing and advanced vehicle tracking and classification algorithm 

      Corera Orzanco, Íñigo Upna Orcid; Piñeiro Ben, Enrique; Navallas Irujo, Javier; Sagüés García, Mikel Upna Orcid; Loayssa Lara, Alayn (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      We introduce a novel long-range traffic monitoring system for vehicle detection, tracking, and classification based on fiber-optic distributed acoustic sensing (DAS). High resolution and long range are provided by the use ...
    • Synthesis of rectangular waveguide filters with smooth profile oriented to direct metal additive manufacturing 

      Percaz Ciriza, Jon Mikel Upna Orcid; Hussain, Jabir; Arregui Padilla, Iván Upna Orcid; Teberio Berdún, Fernando Upna Orcid; Benito Pertusa, David Upna Orcid; Martín Iglesias, Petronilo; Arnedo Gil, Israel; Gómez Laso, Miguel Ángel Upna Orcid; Lopetegui Beregaña, José María (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      In this paper, a novel design method for rectangular waveguide filters intended for fabrication using direct metal additive manufacturing is proposed. The synthesized filters will feature a smooth profile that allows us ...
    • Design, assessment and deployment of an efficient golf game dynamics management system based on flexible wireless technologies 

      Picallo Guembe, Imanol Upna Orcid; Aguirre Gallego, Erik; López Iturri, Peio Upna Orcid; Guembe Zabaleta, Javier; Olariaga Jauregui, Eduardo; Klaina, Hicham Upna; Marcotegui, José Antonio Upna; Falcone Lanas, Francisco Javier Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The practice of sports has been steadily evolving, taking advantage of different technological tools to improve different aspects such as individual/collective training, support in match development or enhancement of ...
    • Metasurface-inspired flexible wearable MIMO antenna array for wireless body area network applications and biomedical telemetry devices 

      Althuwayb, Ayman Abdulhadi; Alibakhshikenari, Mohammad; Virdee, Bal S.; Rashid, Nasr; Kaaniche, Khaled; Atitallah, Ahmed Ben; Armghan, Ammar; Elhamrawy, Osama I.; See, Chan H; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      This article presents a sub-6GHz ISM-band flexible wearable MIMO antenna array for wireless body area networks (WBANs) and biomedical telemetry devices. The array is based on metasurface inspired technology. The antenna ...
    • A shorted stub loaded UWB flexible antenna for small IoT devices 

      Ali, Esraa Mousa; Awan, Wahaj Abbas; Alizaidi, Mohammed S.; Alzahrani, Abdullah; Elkamchouchi, Dalia H.; Falcone Lanas, Francisco Javier Upna Orcid; Ghoneim, Sherif S. M. (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      In this manuscript, a compact in size yet geometrically simple Ultra-Wideband (UWB) antenna is demonstrated. The flexible-by-nature substrate ROGERS 5880, having a thickness of 0.254 mm, is utilized to design the proposed ...
    • Surface exciton polariton resonances (SEPR)-based sensors 

      Vitoria Pascual, Ignacio Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Ozcariz Celaya, Aritz Upna Orcid; Imas González, José Javier Upna Orcid; Del Villar, Ignacio Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua
      A new type of resonance in the development of sensors using long-range surface exciton polariton (LRSEP) phenomena has been coined: surface exciton plasmon resonance (SEPR). The resonance was obtained in the reflected ...
    • The filling factor of the sEMG signal at low contraction forces in the quadriceps muscles is influenced by the thickness of the subcutaneous layer 

      Rodríguez Falces, Javier Upna Orcid; Malanda Trigueros, Armando Upna Orcid; Mariscal Aguilar, Cristina; Navallas Irujo, Javier (Frontiers Media, 2023)   Artículo / Artikulua  OpenAccess
      Introduction: It has been shown that, for male subjects, the sEMG activity at low contraction forces is normally 'pulsatile', i.e., formed by a few large-amplitude MUPs, coming from the most superficial motor units. The ...
    • Ultra-low frequency multidirectional harvester for wind turbines 

      Castellano Aldave, Jesús Carlos; Carlosena García, Alfonso Upna Orcid; Iriarte Goñi, Xabier Upna Orcid; Plaza Puértolas, Aitor Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      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 ...
    • Spectrally stable thermal emitters enabled by material-based high-impedance surfaces 

      Navajas Hernández, David Upna; Pérez Escudero, José Manuel Upna Orcid; Liberal Olleta, Íñigo Upna Orcid (Royal Society of Chemistry, 2023)   Artículo / Artikulua  OpenAccess
      Radiative thermal engineering with subwavelength metallic bodies is a key element for heat and energy management applications, communication and sensing. Here, we numerically and experimentally demonstrate metallic thermal ...
    • Lossy mode resonance-based optical immunosensor towards detecting gliadin in aqueous solutions 

      Benítez Pérez, Melanys; Zubiate Orzanco, Pablo Upna Orcid; Socorro Leránoz, Abián Bentor Upna Orcid; Matías Maestro, Ignacio Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      The development of accurate, intuitive, and easy-to-handle devices to detect different types of allergens is on the rise, as these are useful tools to guarantee consumer safety, which should be a priority for any food ...
    • Low-loss and dual-band filter inspired by glide symmetry principle over millimeter-wave spectrum for 5G cellular networks 

      Karamirad, Mohsen; Pouyanfar, Negin; Alibakhshikenari, Mohammad; Ghobadi, Changiz; Nourinia, Javad; See, Chan H.; Falcone Lanas, Francisco Javier Upna Orcid (Elsevier, 2023)   Artículo / Artikulua  OpenAccess
      This paper focuses on designing a dual-band, bandpass filter configuration inspired by glide-symmetric structures in a single plane. Geometry configuration of elliptical slots on both sides of single substrate generally ...
    • Improving the width of lossy mode resonances (LMRs) in double-clad fibers 

      Imas González, José Javier Upna Orcid; Del Villar, Ignacio Upna Orcid; Zubiate Orzanco, Pablo Upna Orcid; Ruiz Zamarreño, Carlos Upna Orcid; Matías Maestro, Ignacio Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      In this work, the characteristics of lossy mode resonances (LMRs) in double-clad fibers where the refractive index (RI) of the second cladding is lower than that of the first cladding are analyzed both numerically and ...
    • MmWave channel stationarity analysis of V2X communications in an urban environment 

      Rodríguez Corbo, Fidel Alejandro; Azpilicueta Fernández de las Heras, Leyre Upna Orcid; Celaya Echarri, Mikel Upna Orcid; Shubair, Raed M.; Falcone Lanas, Francisco Javier Upna Orcid (IEEE, 2023)   Artículo / Artikulua  OpenAccess
      Vehicular communication channels are subject to high nonstationarity mainly characterized by the scatterers’ and/or transceivers’ high mobility. In this sense, this letter presents a characterization of the channel ...
    • Reduced loss and prevention of substrate modes with a novel Coplanar Waveguide based on Gap Waveguide technology 

      Biurrun Quel, Carlos Upna Orcid; Teniente Vallinas, Jorge Upna Orcid; Río Bocio, Carlos del Upna Orcid (MDPI, 2023)   Artículo / Artikulua  OpenAccess
      The Gap Waveguide technology utilizes an Artificial Magnetic Conductor (AMC) to prevent the propagation of electromagnetic (EM) waves under certain conditions, resulting in various gap waveguide configurations. In this ...
    • Metal-free design of a multilayered metamaterial with chirped Bragg grating for enhanced radiative cooling 

      Osuna Ruiz, David; Lezaun Capdevila, Carlos; Torres García, Alicia E. Upna Orcid; Beruete Díaz, Miguel Upna Orcid (Optica, 2023)   Artículo / Artikulua  OpenAccess
      A wideband, all-dielectric metamaterial structure for enhancing radiative cooling is investigated. The structure is optimized to reflect most of the solar irradiance window (between 0.3 µm–3 µm), which is one of the biggest ...
    • A study on the EDM drilling of reaction-bonded silicon carbide using different electrode materials 

      Torres Salcedo, Alexia Upna Orcid; Luis Pérez, Carmelo Upna; Puertas Arbizu, Ignacio Upna Orcid; Corres Sanz, Jesús María Upna Orcid (Springer, 2023)   Artículo / Artikulua  OpenAccess
      Today, there is a growing demand for efficient hole manufacturing technology in many industries such as aeronautics, automotive and nuclear, among others. Thus, the present study deals with the machining of through holes ...

      El Repositorio ha recibido la ayuda de la Fundación Española para la Ciencia y la Tecnología para la realización de actividades en el ámbito del fomento de la investigación científica de excelencia, en la Línea 2. Repositorios institucionales (convocatoria 2020-2021).
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