Now showing items 1-20 of 46

    • A Self-Oscillating Single Gatemesfet X-Bandmixer 

      Elias Fusté, Antoni; Terrades Busquets, j; de los Reyes, Elías (Institute of Electrical and Electronics Engineers (IEEE), 1987)
      Conference report
      Open Access
      The nonlinear properties of GaAs MESFET can be used to implement self-oscillating mixers. This paper describes a new single-gate MESFET X-Band mixer of this kind built on a microstrip circuit, its design constraints and ...
    • Accelerated direct solution of the MoM-VIE for dielectric scatterers 

      Heldring, Alexander; Tamayo Palau, José María; Rius Casals, Juan Manuel; Úbeda Farré, Eduard (2011)
      Conference report
      Open Access
      The Multiscale Compressed Block Decomposition algorithm (MS-CBD), a direct (non-iterative) linear solver, is applied to accelerate the solution of the MoM-VIE formulation for dielectric scatterers. Numerical solutions are ...
    • 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 ...
    • Beam focalization by chirped mirrors 

      Cheng, Yu Chieh; Peckus, Martynas; Kicas, Simonas; Trull Silvestre, José Francisco; Cojocaru, Crina; Vilaseca Alavedra, Ramon; Drazdys, Ramutis; Staliunas, Kestutis (Optical Society of American (OSA), 2014)
      Conference report
      Restricted access - confidentiality agreement
      A novel application of chirped dielectric mirrors for narrow beam focalization is proposed and demonstrated numerically and experimentally. Analogy to temporal dispersion compensation by chirped dielectric mirrors is discussed.
    • Cálculo de la difracción de cilindros de forma arbitraria mediante el método de los elementos de contorno 

      Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel (1987)
      Conference report
      Open Access
      The Boundary Element Method is applied to computing electromagnetic scattering of dielectric cylinders of arbitrary shape. The obtained results are shown and compared with analytic solutions and previous results obtained ...
    • Characterization method of the dynamics of the trapped charge in contactless capacitive MEMS 

      Gorreta Mariné, Sergio; Pons Nin, Joan; Domínguez Pumar, Manuel; Blokhina, Elena; Feely, Orla (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      Dielectric charging of insulating films in microelectromechanical systems (MEMS) has a crucial effect on the operation of those devices. A new method is presented in order to characterize the dynamics of the charge trapped ...
    • Charge induced by ionizing radiation understood as a disturbance in a sliding mode control of dielectric charge 

      Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan; Gomez Rodriguez, Faustino; Gonzalez Castaño, Diego (2015-07-03)
      Article
      Open Access
      The purpose of this paper is to show that the charge induced by radiation in a dielectric on which a sigma–delta control of dielectric charge is implemented, can be seen as a disturbance in a sliding mode controller. ...
    • Charge storage and retention in electret dielectric layers for energy harvesting applications 

      Diáz-Ballester, A.; Castillo-Anguera, S; Rafi, J. M.; Gómez-Martínez, R.; Abadal, G.; Figueras, E.; Plaza, J.A.; Esteve, J.; Mudarra López, Miguel; Cañadas Lorenzo, Juan Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      By providing a permanent electric polarization, electrets have a wide range of applications in different fields like sensors and actuators, energy harvesting or biomedicine. Stable electrets with silicon-based compatible ...
    • Closed-loop compensation of dielectric charge induced by ionizing radiation 

      Domínguez Pumar, Manuel; Gorreta Mariné, Sergio; Pons Nin, Joan; Gomez Rodriguez, Faustino; Gonzalez Castaño, Diego; Muschitiello, Michele (2015-06-01)
      Article
      Open Access
      This letter investigates the capability of dielectric charge control loops to cope with charge induced by ionizing radiation. To this effect, an microelectromechanical systems (MEMS) variable capacitor has been irradiated ...
    • Conductores y dieléctricos 

      Lupón Bas, Núria (2008-11-19)
      Audiovisual
      Open Access
    • Contribution of reversible processes to the non-linear dielectric response in hard lead zirconate titanate ceramics 

      García García, José Eduardo; Pérez Pérez, Rafael; Albareda Tiana, Alfonso (2005-10)
      Article
      Open Access
      Se estudia la dependencia entre la constante dieléctrica y las pérdidas con el campo eléctrico aplicado, así como entre la constante dieléctrica y las pérdidas dieléctricas. Los resultados muestran que las cerámicas PZT ...
    • Design of a dielectric flat lens antenna for 60 GHz WPAN applications 

      Imbert Villà, Marc; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      In this paper we present the design of a dielectric flat lens antenna to operate in the 60 GHz band for WPAN applications. In order to overcome the specific atmospheric attenuation, which characterizes the propagation in ...
    • Dielectric and mechanical nonlinear behavior of Mn doped PMN-35PT ceramics 

      Kobor, Diouma; Hajjaji, Abdelowahed; García García, José Eduardo; Pérez Pérez, Rafael; Albareda Tiana, Alfonso; Lebrun, Laurent; Guyomar, Daniel (2010-10)
      Article
      Open Access
      This paper presents an investigation on dielectric and mechanical nonlinear properties in Mn-doped PMN-35PT ceramics. The structural study of the ceramics verifies that the 1% mol Mn doped PMN-35PT is a pure perovskite ...
    • Dielectric and piezoelectric nonlinear properties of slightly textured lead barium niobate ceramics 

      Ochoa Guerrero, Diego A.; Casals Mirones, Jorge Alejandro; Venet, Michel; M'Peko, Jean-Claude; García García, José Eduardo (American Institute of Physics (AIP), 2019-01-09)
      Article
      Open Access
      Dielectric and piezoelectric responses of slightly textured, lead barium niobate ceramics are studied. The designed morphotropic phase boundary composition (Pb0.63Ba0.37Nb2O6) shows considerable nonlinear dielectric and ...
    • Dispersion characteristics and field structure of an axially magnetized ferrite loaded rectangular waveguide 

      Bará Temes, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 1972)
      Conference report
      Open Access
      A basic limitation in an earlier work on the axially magnetized, ferrite loaded rectangular guide has led to a detailed re-examination of this problem. Both a series solution and a perturbational technique are used to find ...
    • Distortion-sensitive insight into the pretransitional behavior of 4-n-octyloxy-4 '-cyanobiphenyl (8OCB) 

      Rzoska, Sylwester J.; Drozd-Rzoska, Aleksandra; Mukherjee, Prabir K; López Pérez, David Orencio; Martínez García, Julio Cesar (Institute Of Physics Publishing Ltd, 2013-06)
      Article
      Restricted access - publisher's policy
      Results of studies of the static and dynamic dielectric properties in rod-like 4-n-octyloxy-40-cyanobiphenyl (8OCB) with isotropic (I)–nematic (N)–smectic A (SmA)–crystal (Cr) mesomorphism, combined with measurements of ...
    • Dynamic heterogeneity in an orientational glass 

      Caballero, Nirvana B.; Zuriaga, Jose Mariano; Tamarit Mur, José Luis; Serra, Pablo (2017-11-14)
      Article
      Open Access
      The family of compounds CBrnCl4-n has been proven helpful in unraveling microscopic mechanisms responsible for glassy behavior. Some of the family members show translational ordered phases with minimal disorder which appears ...
    • Efecto de la reducción simétrica del plano de tierra en líneas microstrip 

      Bará Temes, Francisco Javier (1981)
      Conference report
      Open Access
      The variations of the characteristic impedance and wavelength of a symmetrical biplate line with the width of the upper plate held constant are studied, for several widely used dielectrics, by the method of moments with a ...
    • Efficient analysis of homogeneous dielectric and plasmonic media with integral equation MEI (IE-MEI) 

      Rius Casals, Juan Manuel; Planes Conangla, Gerard; Úbeda Farré, Eduard; Heldring, Alexander (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference lecture
      Restricted access - publisher's policy
      This paper revisits the IE-MEI method and proposes a new formulation for high-loss dielectric piecewise-homogeneous media. The aim of this work is to assess if the fast attenuation of fields in highly lossy media helps in ...
    • Enhanced dielectric performance of a block copolymer-polythiophene nanocomposite 

      Pérez Madrigal, Mª del Mar; Ochoa Guerrero, Diego A.; García García, José Eduardo; Armelín Diggroc, Elaine Aparecida; Alemán Llansó, Carlos (2016-09-15)
      Article
      Open Access
      Dielectric elastomer actuators (DEAs) transform electrical energy into mechanical work. However, despite displaying exceptional features, the low permittivity of elastomers restricts their application. Hence, to overcome ...