Sökning: "FDTD"

Visar resultat 16 - 20 av 47 avhandlingar innehållade ordet FDTD.

  1. 16. Finite difference time domain analysis of heating of foods in household microwave ovens : improving the heating uniformity of microwave heated foods

    Författare :Birgitta Wäppling-Raaholt; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave heating; finite difference time domain; heating uniformity; heat transfer; FDTD; modelling; microwave oven;

    Sammanfattning : .... LÄS MER

  3. 17. Design of hat fed reflector antennas using FDTD

    Författare :Jian Yang; Per-Simon Kildal; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; soft and hard surfaces; finite difference time domain FDTD method; sperture efficiencies; Gaussian vertex plate; corrugations; edge corrugations; hat feed antenna; phase center; vertex plate; ring-focus paraboloid; paraboloid; V2D code; ring-shaped phase center; BOR1 antenna; reflector shaping; reflector antenna;

    Sammanfattning : .... LÄS MER

  4. 18. Time-Domain Inverse Electromagnetic Scattering using FDTD and Gradient-based Minimization

    Författare :Erik Abenius; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; inverse scattering fdtd minimization adjoint ;

    Sammanfattning : The thesis addresses time-domain inverse electromagneticscattering for determining unknown characteristics of an objectfrom observations of the scattered .eld. Applications includenon-destructive characterization of media and optimization ofmaterial properties, for example the design of radar absorbingmaterials. LÄS MER

  5. 19. Stable FEM-FDTD Hybrid Method for Maxwell's Equations

    Författare :Thomas Rylander; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite Element Method; scattering; antennas; stability analysis; edge elements; Maxwell s equations; NASA almond; microwave circuits; mass lumping; proof of stability; explicit-implicit time-stepping; Finite-Differences Time-Domain;

    Sammanfattning : In this thesis edge elements are applied to solve several problems in computational electromagnetics. In particular, a hybrid scheme joining the Finite Element Method (FEM) and the Finite-Difference Time-Domain (FDTD) algorithm is developed, tested and exploited. LÄS MER

  7. 20. A comprehensive study of resistor-loaded planar dipole antennas for ground penetrating radar applications

    Författare :Disala Uduwawala; Martin Norgren; Olav Breinbjerg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ground penetrating radar; buried object detection; dipole antennas; FDTD methods; broadband properties; baluns; simulation; optimal design; lossy media; dispersive media; clutter.; Electrical engineering; Elektroteknik;

    Sammanfattning : Ground penetrating radar (GPR) systems are increasingly being used for the detection and location of buried objects within the upper regions of the earth’s surface. The antenna is the most critical component of such a system. LÄS MER