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COMS7300

The problem with moment methods. A time domain approach, Why?. MoM inadequate for pulsed

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COMS7300

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    1. COMS7300

    2. The problem with moment methods

    3. Reason for interest in FDTD

    4. Some big advantages

    5. How does it work?

    6. closed & open problems

    7. Preliminaries

    8. 3D formulation

    9. 2D formulation

    10. Regroup the 6 equations

    11. 1D formulation

    12. Similarly

    13. Yee algorithm

    14. classic definition of derivative

    15. solve for:

    17. E- equation

    18. Robustness of FDTD It solves both for E& H It interleaves its E & H components in 3D and is consistent with Ampere and Faraday’s laws. It centres E & H field in a leapfrog arrangement (only recent E & H data need be held) No Matrices involved!

    19. Yee’s 3D Mesh

    20. Transition to 3D

    21. for derivatives

    22. The 3D equations

    23. Cell size

    24. Time step size

    25. The algorithm

    26. ABC

    27. Where to from here? Introductory: Ch 11 in Antenna Theory & Design. Stutzman & Thiele. More advanced: “Time Domain Methods for Microwave Structures” Ed Itoh & Houshmand IEEE press. 1998. “The FDTM for Electromagnetics”, Kunz & Luebbers. CRC Press, 1993.

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