The Experts below are selected from a list of 231183 Experts worldwide ranked by ideXlab platform

Bernard Jecko - One of the best experts on this subject based on the ideXlab platform.

  • Time-Domain Surface impedances of lossless Debye media
    Annales Des Télécommunications, 1995
    Co-Authors: Salah Kellali, Alain Reineix, Philippe Lévêque, Bernard Jecko
    Abstract:

    In a previous paper, a Surface impedance formalism was given. Its application to interfaces modelling between homogeneous and frequency dependent media, was of great interest in the finite difference timeDomain (fdtd) codes. In this paper, an extension of the method to dispersive media is presented. Applying this formalism to lossless Debye medium, the analytical expressions of the time- Domain Surface impedances are given. The implementation in a fdtd code permits then a numerical verification of the results in relation to the Fresnel method.

  • Time-Domain Surface impedances of lossless Debye media
    Annales Des Télécommunications, 1995
    Co-Authors: Salah Kellali, Alain Reineix, Philippe Lévêque, Bernard Jecko
    Abstract:

    In a previous paper, a Surface impedance formalism was given. Its application to interfaces modelling between homogeneous and frequency dependent media, was of great interest in the finite difference timeDomain (fdtd) codes. In this paper, an extension of the method to dispersive media is presented. Applying this formalism to lossless Debye medium, the analytical expressions of the time- Domain Surface impedances are given. The implementation in a fdtd code permits then a numerical verification of the results in relation to the Fresnel method. Le formalisme ď impédance de Surface a déjà été développé dans un précédent article. II a été appliqué à la modélisation ďinterfaces entre un milieu homogène et un milieu diélectrique indépendant de la fréquence. Ľ intérêt ďun tel formalisme a été montré lorsqu’il est implanté dans un programme aux différences finies dans le Domaine temps (fdtd). Dans cet article, les auteurs presentent ľ extension de la méthode à des milieux dispersifs. En particulier, les milieux suivant une loi de variation harmonique de type Debye sont étudiés. Ainsi, une expression analytique de ď impédance de Surface est donnée directement dans le Domaine temporel pour de tels milieux. Le formalisme est ensuite implanté dans un programme de type fdtd et sa validation est effectuée en comparant les résultats obtenus avec ceux qui seraient donnés directement pour les facteurs de réflexion de Fresnel.

  • Absorbing Surface impedances of lossy layers in the finite difference time-Domain method
    Annales Des Télécommunications, 1994
    Co-Authors: Salah Kellali, Bernard Jecko, Alain Reineix
    Abstract:

    In this paper the time-Domain Surface impedances of an homogeneous absorber layer, are given for the vertical and horizontal polarizations, or respectively for the electric field perpendicular or parallel to the incidence plane. It turns out that the application of the concept in finite difference time-Domain (FDTD) in absorbing Surface impedances boundary conditions, gives results in good agreement with analytical Fresnel reflection coefficients.

Alain Reineix - One of the best experts on this subject based on the ideXlab platform.

  • Time-Domain Surface impedances of lossless Debye media
    Annales Des Télécommunications, 1995
    Co-Authors: Salah Kellali, Alain Reineix, Philippe Lévêque, Bernard Jecko
    Abstract:

    In a previous paper, a Surface impedance formalism was given. Its application to interfaces modelling between homogeneous and frequency dependent media, was of great interest in the finite difference timeDomain (fdtd) codes. In this paper, an extension of the method to dispersive media is presented. Applying this formalism to lossless Debye medium, the analytical expressions of the time- Domain Surface impedances are given. The implementation in a fdtd code permits then a numerical verification of the results in relation to the Fresnel method.

  • Time-Domain Surface impedances of lossless Debye media
    Annales Des Télécommunications, 1995
    Co-Authors: Salah Kellali, Alain Reineix, Philippe Lévêque, Bernard Jecko
    Abstract:

    In a previous paper, a Surface impedance formalism was given. Its application to interfaces modelling between homogeneous and frequency dependent media, was of great interest in the finite difference timeDomain (fdtd) codes. In this paper, an extension of the method to dispersive media is presented. Applying this formalism to lossless Debye medium, the analytical expressions of the time- Domain Surface impedances are given. The implementation in a fdtd code permits then a numerical verification of the results in relation to the Fresnel method. Le formalisme ď impédance de Surface a déjà été développé dans un précédent article. II a été appliqué à la modélisation ďinterfaces entre un milieu homogène et un milieu diélectrique indépendant de la fréquence. Ľ intérêt ďun tel formalisme a été montré lorsqu’il est implanté dans un programme aux différences finies dans le Domaine temps (fdtd). Dans cet article, les auteurs presentent ľ extension de la méthode à des milieux dispersifs. En particulier, les milieux suivant une loi de variation harmonique de type Debye sont étudiés. Ainsi, une expression analytique de ď impédance de Surface est donnée directement dans le Domaine temporel pour de tels milieux. Le formalisme est ensuite implanté dans un programme de type fdtd et sa validation est effectuée en comparant les résultats obtenus avec ceux qui seraient donnés directement pour les facteurs de réflexion de Fresnel.

  • Absorbing Surface impedances of lossy layers in the finite difference time-Domain method
    Annales Des Télécommunications, 1994
    Co-Authors: Salah Kellali, Bernard Jecko, Alain Reineix
    Abstract:

    In this paper the time-Domain Surface impedances of an homogeneous absorber layer, are given for the vertical and horizontal polarizations, or respectively for the electric field perpendicular or parallel to the incidence plane. It turns out that the application of the concept in finite difference time-Domain (FDTD) in absorbing Surface impedances boundary conditions, gives results in good agreement with analytical Fresnel reflection coefficients.

Salah Kellali - One of the best experts on this subject based on the ideXlab platform.

  • Time-Domain Surface impedances of lossless Debye media
    Annales Des Télécommunications, 1995
    Co-Authors: Salah Kellali, Alain Reineix, Philippe Lévêque, Bernard Jecko
    Abstract:

    In a previous paper, a Surface impedance formalism was given. Its application to interfaces modelling between homogeneous and frequency dependent media, was of great interest in the finite difference timeDomain (fdtd) codes. In this paper, an extension of the method to dispersive media is presented. Applying this formalism to lossless Debye medium, the analytical expressions of the time- Domain Surface impedances are given. The implementation in a fdtd code permits then a numerical verification of the results in relation to the Fresnel method.

  • Time-Domain Surface impedances of lossless Debye media
    Annales Des Télécommunications, 1995
    Co-Authors: Salah Kellali, Alain Reineix, Philippe Lévêque, Bernard Jecko
    Abstract:

    In a previous paper, a Surface impedance formalism was given. Its application to interfaces modelling between homogeneous and frequency dependent media, was of great interest in the finite difference timeDomain (fdtd) codes. In this paper, an extension of the method to dispersive media is presented. Applying this formalism to lossless Debye medium, the analytical expressions of the time- Domain Surface impedances are given. The implementation in a fdtd code permits then a numerical verification of the results in relation to the Fresnel method. Le formalisme ď impédance de Surface a déjà été développé dans un précédent article. II a été appliqué à la modélisation ďinterfaces entre un milieu homogène et un milieu diélectrique indépendant de la fréquence. Ľ intérêt ďun tel formalisme a été montré lorsqu’il est implanté dans un programme aux différences finies dans le Domaine temps (fdtd). Dans cet article, les auteurs presentent ľ extension de la méthode à des milieux dispersifs. En particulier, les milieux suivant une loi de variation harmonique de type Debye sont étudiés. Ainsi, une expression analytique de ď impédance de Surface est donnée directement dans le Domaine temporel pour de tels milieux. Le formalisme est ensuite implanté dans un programme de type fdtd et sa validation est effectuée en comparant les résultats obtenus avec ceux qui seraient donnés directement pour les facteurs de réflexion de Fresnel.

  • Absorbing Surface impedances of lossy layers in the finite difference time-Domain method
    Annales Des Télécommunications, 1994
    Co-Authors: Salah Kellali, Bernard Jecko, Alain Reineix
    Abstract:

    In this paper the time-Domain Surface impedances of an homogeneous absorber layer, are given for the vertical and horizontal polarizations, or respectively for the electric field perpendicular or parallel to the incidence plane. It turns out that the application of the concept in finite difference time-Domain (FDTD) in absorbing Surface impedances boundary conditions, gives results in good agreement with analytical Fresnel reflection coefficients.

Vikram Jandhyala - One of the best experts on this subject based on the ideXlab platform.

  • (S)PEEC: Time- and frequency-Domain Surface formulation for modeling conductors and dielectrics in combined circuit electromagnetic simulations
    IEEE Transactions on Microwave Theory and Techniques, 2006
    Co-Authors: Dipanjan Gope, Chuanyi Yang, Albert E. Ruehli, Vikram Jandhyala
    Abstract:

    The partial element equivalent circuit (PEEC) formulation is an integral-equation-based approach for the solution of combined circuit and electromagnetic (EM) problems. In this paper, a Surface-based PEEC formulation is presented to complement the existing volume-based method. With the rise in the operating frequencies and the increasing complexity of test structures on boards, packages, and chips, a Surface-based formulation is more efficient for many problems in terms of the number of unknowns generated. The composite conductor dielectric modeling is based on the PMCHWT formulation which is transformed into a PEEC representation using equivalent magnetic and electric circuits connected by mutual coupling. Both time- and frequency-Domain analyses are discussed, similar to a Spice-type circuit solver. The new formulation is compared with the volume-based PEEC approach in terms of accuracy and the number of unknowns generated

  • Modeling of Lossy Multiregion Substrates in Microelectronic Circuits Using Time-Domain Surface Integral Equations
    Microwave and Optical Technology Letters, 2005
    Co-Authors: Chuanyi Yang, Vikram Jandhyala
    Abstract:

    In this work, the electromagnetic modeling of multiregion, finite-sized lossy substrates in microelectronic circuits is carried out utilizing time-Domain Surface integral equations. To reduce the additional computational complexity in the implementation caused by the decaying “wake” of the Green's function in lossy media, the resulting temporal convolution is addressed by the creation and use of an a priori exponential fitting table for discrete distances through Prony's method. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 68–73, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21084

  • A time-Domain Surface integral technique for mixed electromagnetic and circuit simulation
    IEEE Transactions on Advanced Packaging, 2005
    Co-Authors: Chuanyi Yang, Vikram Jandhyala
    Abstract:

    This paper presents a coupled simulation approach in the time Domain for modeling nonlinear circuits, electromagnetic components, and electromagnetic interference (EMI) interactions together in one integrated methodology. The approach is based on a rigorous coupling of circuit simulation and time-Domain integral equation simulation. The method obviates the need for circuit realizations of electromagnetic interactions, and can be considered complementary to the partial element equivalent circuits, for cases where Surface-based modeling is preferable such as complex connectors and packages, and for Green's function based modeling of skin effects.

  • A time Domain Surface integral technique for mixed electromagnetic and circuit simulation
    Electrical Performance of Electronic Packaging, 1
    Co-Authors: Chuanyi Yang, Vikram Jandhyala
    Abstract:

    A full-wave time Domain Surface integral approach to coupled electromagnetic and circuit simulation is presented in this paper. In particular, non-linear circuit elements and effects of interference and crosstalk can be modeled in the time Domain. The coupling of lumped elements to a Surface integral formulation is detailed. Losses are modeled with an efficient recursive convolution.

Guy A. E. Vandenbosch - One of the best experts on this subject based on the ideXlab platform.

  • Time-Domain Surface impedance of a plasmonic half-space
    2012 6th European Conference on Antennas and Propagation (EUCAP), 2012
    Co-Authors: Martin Stumpf, Guy A. E. Vandenbosch
    Abstract:

    In this paper we report a part of the results of the research that has been carried out thanks to the financial support of the EU-FP7 CARE (Coordinating the Antenna Research in Europe) Project. As a result of the established cooperation between BUT (Brno University of Technology, the Czech Republic) and K. U. Leuven (Katholieke Universiteit Leuven, Belgium) we present the time-Domain Surface impedance connected with a plane-wave incidence on a half-space with plasmonic properties. It is shown that by a simple choice of branch-cuts the time-Domain Surface impedance can be expressed via a definite one-dimensional integral of elementary functions only. Illustrative numerical examples are presented.

  • Time-Domain Behavior of Plasmonic Half-Spaces
    IEEE Photonics Journal, 2012
    Co-Authors: Martin Stumpf, Guy A. E. Vandenbosch
    Abstract:

    The time-Domain Surface impedance for a plane-wave incidence on a half-space with conductive and plasmonic properties is theoretically investigated. This paper provides closed-form time-Domain expressions of time-Domain Surface impedance values that can be readily evaluated numerically within any prescribed accuracy. Based on the Surface impedance concept, time-Domain responses of conductive and plasmonic half-spaces are analyzed and discussed. In this respect, changes in incident pulse shapes upon transmission and reflection against plasmonic boundaries are predicted. Numerical results for practically used metallic materials are presented.