Now showing items 1-20 of 54

    • A computational multiscale homogenization framework accounting for inertial effects: application to acoustic metamaterials modelling 

      Roca Cazorla, David; Lloberas Valls, Oriol; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (2018-03)
      Article
      Open Access
      A framework, based on an extended Hill–Mandel principle accounting for inertial effects (Multiscale Virtual Work principle), is developed for application to acoustic problems in the context of metamaterials modelling. The ...
    • A simple and effective microwave invisibility cloak based on frequency selective surfaces 

      Yuste, Pedro; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Blanch Boris, Sebastián; Heldring, Alexander; Úbeda Farré, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
      Open Access
      This paper presents the design, simulation, manufacturing and testing of a simple invisibility cloak based on a frequency selective surface (FSS). The work is focused on cloaking an electrically thin dielectric cylinder ...
    • ABSense: sensing electromagnetic waves on metasurfaces via ambient compilation of full absorption 

      Liaskos, Christos; Pyrialakos, Georgios; Pitilakis, Alexandros; Abadal Cavallé, Sergi; Tsioliaridou, Ageliki; Tasolamprou, Anna; Tsilipakos, Odysseas; Kantartzis, Nikolaos V.; Ioannidis, Sotiris; Alarcón Cot, Eduardo José; Cabellos Aparicio, Alberto; Kafesaki, Maria; Pitsillides, Andreas; Kossifos, Kypros; Georgiou, Julius; Akyildiz, Ian (Association for Computing Machinery (ACM), 2019)
      Conference report
      Open Access
      Metasurfaces (MS) constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications in areas such as wireless communications, ...
    • Acoustic metamaterials with controllable transmission: from complete sound attenuation to a transparent state 

      Enrique Feliu, Laura (Universitat Politècnica de Catalunya, 2020-04-24)
      Master thesis
      Restricted access - author's decision
      Covenantee:   Rijksuniversiteit Groningen
      This project deals with the design and analysis of sound scattering in acoustic metamaterials with the aim to realize a controllable transmission response. First, a so-called stealth acoustic metamaterial is studied. This ...
    • Al2O3/TiO2 inverse opals from electrosprayed self-assembled templates 

      Coll, Arnau; Bermejo Broto, Sandra; Hernández, David; Castañer Muñoz, Luis María (2018-01-19)
      Article
      Open Access
      The fabrication of high optical quality inverse opals is challenging, requiring large size, three-dimensional ordered layers of high dielectric constant ratio. In this article, alumina/TiO2–air inverse opals with a 98.2% ...
    • All-dielectric self-cloaked structures 

      Hayran, Zeki; Kurt, H.; Herrero Simon, Ramon; Botey Cumella, Muriel; Staliunas, Kestutis (2018-03-17)
      Article
      Open Access
      A general procedure to design objects that are intrinsically invisible (without the necessity of an external cloak) has not been demonstrated so far. Here we propose a flexible method to design such self-cloaked objects ...
    • Analysis of PIFA antenna coupling in nearby traces and reduction with CSRRs in PCB at 2.45 GHz 

      Gil Galí, Ignacio; Fernández García, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Open Access
      The electromagnetic coupling of a conventional planar inverted-F antenna (PIFA) antenna in the nearby layout traces is investigated in the 2.45 GHz industrial, scientific and medical radio band. The impact of a complementary ...
    • Building metamaterials 

      Perera Castilla, Saúl (Universitat Politècnica de Catalunya, 2019-10)
      Master thesis
      120 months embargo
      This thesis shows the work done to design, fabricate and characterise the formation of nanostructures built with polystyrene nanospheres (295 nm, 522 nm and 836 nm diameter size) in an attempt to develop all dielectric ...
    • Characterization and modelling of switchable stop-band filters based on RF-MEMS and complementary split ring resonators 

      Gil Galí, Ignacio; Morata Cariñena, Marta; Fernández García, Raúl; Rottenberg, Xavier; De Raedt, Walter (2010-08-13)
      Article
      Open Access
      In this work, we present the characterization and electrical modelling of a reconfigurable stop-band filter based on RF microelectromechanical systems (RF-MEMS) combined with metamaterial structures. The device consists ...
    • Characterization of EMI filters based on metamaterials 

      Gil Galí, Ignacio; Fernández García, Raúl; Vives, Yolanda; Jauregui Tellería, Ricardo; Silva Martínez, Fernando (2009-06)
      Conference lecture
      Open Access
      This paper analyzes the behavior of EMI filters based on metamaterials. The filters are developed by means of sub-wavelength resonators and designed to have notch-type attenuation in the 2.45 GHz band. Two types of filters ...
    • Computational design of locally resonant acoustic metamaterials 

      Roca Cazorla, David; Yago Llamas, Daniel; Cante Terán, Juan Carlos; Lloberas Valls, Oriol; Oliver Olivella, Xavier (2019-03)
      Article
      Restricted access - publisher's policy
      The so-called Locally Resonant Acoustic Metamaterials (LRAM) are considered for the design of specifically engineered devices capable of stopping waves from propagating in certain frequency regions (bandgaps), this making ...
    • Computational material design for acoustic cloaking 

      Méndez, Carlos Alberto; Podestá, J.M.; Lloberas Valls, Oriol; Toro, Sebastian; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (John Wiley & Sons, 2017-12)
      Article
      Open Access
      A topology optimization technique based on the topological derivative and the level set function is utilized to design/synthesize the micro-structure of a pentamode material for an acoustic cloaking device. The technique ...
    • Computational Material design study of acoustic metamaterials and structures by topology optimization 

      Roca Cazorla, David (Universitat Politècnica de Catalunya, 2016-06)
      Master thesis
      Restricted access - author's decision
      Acoustic metamaterials are artificially designed and manufactured structures with dy-namical properties that are not typically found in naturally-occurring materials. The design of acoustic metamaterials is considered to ...
    • Computing and communications for the software-defined metamaterial paradigm: a context analysis 

      Abadal Cavallé, Sergi; Liaskos, Christos; Tsioliaridou, Ageliki; Ioannidis, Sotiris; Pitsillides, Andreas; Solé Pareta, Josep; Alarcón Gallo, Eduardo; Cabellos Aparicio, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2017-01-01)
      Article
      Open Access
      Metamaterials are artificial structures that have recently enabled the realization of novel electromagnetic components with engineered and even unnatural functionalities. Existing metamaterials are specifically designed ...
    • Conformal transformation of Dyakonov surface waves into bound states of cylindrical metamaterials 

      Kajorndejnukul, Veerachart; Artigas García, David; Torner Sabata, Lluís (American Physical Society (APS), 2019-11-05)
      Article
      Open Access
      We put forward the use of transformation optics to map surface waves that exist as one-dimensional modes supported by anisotropic structures into bound states in two-dimensional geometries. Specifically, we show the conformal ...
    • Differential and common-mode filters based on metamaterial resonators 

      Gil Galí, Ignacio; Fernández García, Raúl (2013)
      Conference lecture
      Open Access
      Two different techniques based on metamaterials for mitigating both the differential and common-mode propagation in differential signaling are addressed. The proposed filters are implemented by means of complementary ...
    • Differential- and common-mode radiofrequency interference filters based on complementary split ring resonators: a conduction and radiation impact analysis 

      Gil Galí, Ignacio; Fernández García, Raúl (2015-01-22)
      Article
      Open Access
      This paper aims to analyse the design techniques of differential transmission lines loaded with metamaterials. Specifically, complementary split-ring resonators were etched on the ground plane of a microstrip transmission ...
    • Digital metasurface based on graphene: An application to beam steering in terahertz plasmonic antennas 

      Hosseininejad, Seyed Ehsan; Rouhi, Kasra; Neshat, Mohammad; Cabellos Aparicio, Alberto; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José (2019-06-25)
      Article
      Open Access
      Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful capabilities on manipulation of electromagnetic waves. Recent times have seen the emergence of a variety ...
    • Diseño de celdas metamateriales usando tecnología monolítica multicapas 

      Cassany Viladomat, David (Universitat Politècnica de Catalunya, 2010)
      Master thesis (pre-Bologna period)
      Open Access
      Castellano: En este trabajo se estudia e investiga el diseño de celdas metamateriales en un sustrato multicapa monolítico, tal y como ya sugiere el título. El objetivo es usar un sustrato con Benzocyclbutene (BCB) como ...
    • Diseño de filtros modo común para sistemas balanceados basados en metamateriales 

      Pachón Muñoz, Arturo (Universitat Politècnica de Catalunya, 2010)
      Master thesis (pre-Bologna period)
      Open Access
      Los actuales servcios de radiofrecuencia presentan una mayor dificultad, desde el punto de vista de compatibilidad electromagnética, debido a la necesidad de compactarlos lo máximo posible. Para mitigar los efectos que ...