Search for dissertations about: "GTD"

Found 4 swedish dissertations containing the word GTD.

  1. 1. Pay tracing tools for high frequency electromagnetics simulations

    University dissertation from Stockholm : Numerisk analys och datalogi

    Author : Sandy Sefi; KTH.; [2003]
    Keywords : CEM; GTD; Ray Tracing; NURBS; Software Architecture; Shadowing;

    Abstract : Over the past 20 years, the development in ComputationalElectromagnetics has produced a vast choice of methods based onthe large number of existing mathematical formulations of theMaxwell equations. None of them dominate over the others,instead they complement each other and the choice of methoddepends on the frequency range of the electromagnetic waves. READ MORE

  2. 2. Computational electromagnetics software development and high frequency modeling of surface currents on perfect conductors

    University dissertation from Stockholm : KTH

    Author : Sandy Sefi; KTH.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; High frequency approximations; Maxwell’s equations; Method of Moments; Physical Optics; Geometrical Theory of Diffraction; Extraction Extrapolation; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys;

    Abstract : In high frequency computational electromagnetics, rigorous numerical methods be come unrealistic tools due to computational demand increasing with the frequency. Instead approximations to the solutions of the Maxwell equations can be employed to evaluate th electromagnetic fields. READ MORE

  3. 3. Hybrid Methods for Computational Electromagnetics in Frequency Domain

    University dissertation from Stockholm : Numerisk analys och datalogi (NADA), (tills m KTH)

    Author : Stefan Hagdahl; Stockholms universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; Geometrical Theory of Diffraction; Smooth Surface Diffraction; Boundary Element Method; Hybrid methods; Electromagnetic Scattering; MATHEMATICS Applied mathematics Numerical analysis; MATEMATIK Tillämpad matematik Numerisk analys;

    Abstract : In this thesis we study hybrid numerical methods to be used in computational electromagnetics. The purpose is to address a wide frequency range relative to a given geometry. We also focus on efficient and robust numerical algorithms for computing the so called Smooth Surface Diffraction predicted by Geometrical Theory of Diffraction (GTD). READ MORE

  4. 4. Electron Tunneling and Field-Effect Devices in mm-Wave Circuits

    University dissertation from Lund University

    Author : Mikael Egard; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2012]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; negative differential conductance oscillator; resonant tunneling diode; ultra-wideband; impulse radio; Wavelet generator; MOSFET; nanowire; high frequency characterization; Fysicumarkivet A:2012:Egard;

    Abstract : Popular Abstract in Swedish Arbetet i denna avhandling berör elektroniska komponenter och hur de kan användas i kretsar för trådlös kommunikation. Den huvudsakliga slutsatsen av arbetet är att innovativa och icke konventionella komponenter kan bidra till att förbättra presentanda och minska effektförbrukningen i system för kommunikation på korta avstånd. READ MORE