The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Ngai Wong - One of the best experts on this subject based on the ideXlab platform.

  • efficient numerical modeling of random rough surface effects for interconnect Internal Impedance extraction
    Asia and South Pacific Design Automation Conference, 2008
    Co-Authors: Quan Chen, Ngai Wong
    Abstract:

    This paper proposes an efficient model for numerically evaluating the impact of random surface roughness on the Internal Impedance for large-scale interconnect structures. The effective resistivity (ER) and effective permeability (EP) are numerically formulated to avoid the computationally prohibitive global discretization, while maintaining the model accuracy and flexibility. A modified stochastic integral equation (SIE) method is proposed to significantly speed up the computation for the mean values of ER and EP under the assumption of random surface roughness. Numerical experiments then verify the efficacy of our approach.

  • ASP-DAC - Efficient numerical modeling of random rough surface effects for interconnect Internal Impedance extraction
    2008 Asia and South Pacific Design Automation Conference, 2008
    Co-Authors: Quan Chen, Ngai Wong
    Abstract:

    This paper proposes an efficient model for numerically evaluating the impact of random surface roughness on the Internal Impedance for large-scale interconnect structures. The effective resistivity (ER) and effective permeability (EP) are numerically formulated to avoid the computationally prohibitive global discretization, while maintaining the model accuracy and flexibility. A modified stochastic integral equation (SIE) method is proposed to significantly speed up the computation for the mean values of ER and EP under the assumption of random surface roughness. Numerical experiments then verify the efficacy of our approach.

Slavko Vujević - One of the best experts on this subject based on the ideXlab platform.

Quan Chen - One of the best experts on this subject based on the ideXlab platform.

  • efficient numerical modeling of random rough surface effects for interconnect Internal Impedance extraction
    Asia and South Pacific Design Automation Conference, 2008
    Co-Authors: Quan Chen, Ngai Wong
    Abstract:

    This paper proposes an efficient model for numerically evaluating the impact of random surface roughness on the Internal Impedance for large-scale interconnect structures. The effective resistivity (ER) and effective permeability (EP) are numerically formulated to avoid the computationally prohibitive global discretization, while maintaining the model accuracy and flexibility. A modified stochastic integral equation (SIE) method is proposed to significantly speed up the computation for the mean values of ER and EP under the assumption of random surface roughness. Numerical experiments then verify the efficacy of our approach.

  • ASP-DAC - Efficient numerical modeling of random rough surface effects for interconnect Internal Impedance extraction
    2008 Asia and South Pacific Design Automation Conference, 2008
    Co-Authors: Quan Chen, Ngai Wong
    Abstract:

    This paper proposes an efficient model for numerically evaluating the impact of random surface roughness on the Internal Impedance for large-scale interconnect structures. The effective resistivity (ER) and effective permeability (EP) are numerically formulated to avoid the computationally prohibitive global discretization, while maintaining the model accuracy and flexibility. A modified stochastic integral equation (SIE) method is proposed to significantly speed up the computation for the mean values of ER and EP under the assumption of random surface roughness. Numerical experiments then verify the efficacy of our approach.

Vedran Boras - One of the best experts on this subject based on the ideXlab platform.

  • High-Accurate Numerical Computation of Internal Impedance of Cylindrical Conductors for Complex Arguments of Arbitrary Magnitude
    IEEE Transactions on Electromagnetic Compatibility, 2014
    Co-Authors: Slavko Vujević, Dino Lovrić, Vedran Boras
    Abstract:

    In this paper, a numerical model is proposed for computing the per-unit-length Internal Impedance of tubular cylindrical conductors for complex arguments of arbitrary magnitudes. The proposed model either numerically solves the exact formula for Internal Impedance consisting of modified Bessel functions or utilizes asymptotic approximations of modified Bessel functions when applicable. It is shown that the results obtained by the proposed model are highly accurate and numerically stable. The proposed model is also applicable for solid cylindrical conductors.

  • A HYBRID ALGORITHM FOR COMPUTATION OF RECTANGULAR CONDUCTOR
    2012
    Co-Authors: Vedran Boras
    Abstract:

    A hybrid algorithm for the computation of rectangular conductor per unit length Internal Impedance is developed. Up to a switching frequency, the Internal Impedance is computed using a two dimensional analytical formula developed by Giacoletto. For these frequencies, 150 terms of Giacoletto infinite sum give a sufficiently good approximation. For higher frequencies, it is shown that the rectangular conductor can be quite accurately approximated by a cylindrical conductor. The proposed hybrid algorithm, for higher frequencies, features improved accuracy and speed when compared to the Giacoletto formula truncated after a small number of terms. -

  • Accuracy of approximate formulas for Internal Impedance of tubular cylindrical conductors for large parameters
    Progress In Electromagnetics Research M, 2011
    Co-Authors: Dino Lovrić, Vedran Boras, Slavko Vujević
    Abstract:

    Exact formulas for Internal Impedance per unit length of tubular cylindrical conductors energized by time-harmonic current involve Bessel functions. These functions are deflned by inflnite series, which yield unstable and often erroneous results for complex arguments of large magnitudes. Although it is well known how to evaluate Bessel functions numerically and many routines are now available to perform the actual computation, the available software routines often fail when computing equations that consist of a product and a quotient of Bessel functions under large complex or real arguments. For such cases, difierent approximate formulas can be used. In this paper, three types of approximate formulas for Internal Impedance of tubular cylindrical conductors are compared with respect to numerical stability and accuracy.

  • Definition and computation of cylindrical conductor Internal Impedance for large parameters
    2010
    Co-Authors: Vedran Boras, Slavko Vujević, Dino Lovrić
    Abstract:

    Exact formulas for Internal Impedance per unit length of solid and tubular cylindrical conductors energized by time-harmonic current involve Bessel functions. These functions are defined by infinite series, which yield unstable and often erroneous results for large magnitudes of the complex function arguments. For such cases, approximate formulas can be used. Results obtained by exact formula and approximate formulas for computation of Internal Impedance per unit length of solid and tubular cylindrical conductors are compared.

  • A Novel Algorithm for Internal Impedance Computation of Solid and Tubular Cylindrical Conductors
    International Review of Electrical Engineering-iree, 2009
    Co-Authors: Slavko Vujević, Vedran Boras, Petar Sarajcev
    Abstract:

    Computation of the Internal Impedance per unit length of solid and tubular cylindrical conductors, energized by time-harmonic current, needs to take into account the skin effect. Computation algorithm often involves direct numerical manipulations with Bessel functions, which yields unstable and often erroneous results for large magnitudes of the function argument at high frequencies. In order to alleviate the afore mentioned problem, this paper presents a novel computational algorithm based on the Hankel asymptotic approximations of the Bessel functions for large magnitudes of the arguments. Proposed approximate formulas assure numerical stability and very high accuracy of the numerical solution, even in case of very large function arguments. They are, at the same time, very convenient for the numerical implementation in any high level programming language.

Petar Sarajcev - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Algorithm for Internal Impedance Computation of Solid and Tubular Cylindrical Conductors
    International Review of Electrical Engineering-iree, 2009
    Co-Authors: Slavko Vujević, Vedran Boras, Petar Sarajcev
    Abstract:

    Computation of the Internal Impedance per unit length of solid and tubular cylindrical conductors, energized by time-harmonic current, needs to take into account the skin effect. Computation algorithm often involves direct numerical manipulations with Bessel functions, which yields unstable and often erroneous results for large magnitudes of the function argument at high frequencies. In order to alleviate the afore mentioned problem, this paper presents a novel computational algorithm based on the Hankel asymptotic approximations of the Bessel functions for large magnitudes of the arguments. Proposed approximate formulas assure numerical stability and very high accuracy of the numerical solution, even in case of very large function arguments. They are, at the same time, very convenient for the numerical implementation in any high level programming language.