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Program15 1D FDTD with Mur's Absorbing Boundary Condition

version 1.0.0.0 (4.05 KB) by Computational Electromagnetics At IIT Madras
1D FDTD with Mur's Absorbing Boundary Condition (ABC)

1.6K Downloads

Updated 09 Feb 2012

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Youtube Links :-
http://www.youtube.com/watch?v=lK7Ywzg8ZuI
http://www.youtube.com/watch?v=AhfQK6KqLLk
http://www.youtube.com/watch?v=d4SKDsHYNt0
http://www.youtube.com/watch?v=64FSY5cqgRI

Written for Course :-
Computational Electromagnetics, Fall 2011
Department of Electrical Engineering
Indian Institute of Technology Madras (IITM)
Chennai - 600036, India

Authors :-
Sathya Swaroop Ganta, B.Tech., M.Tech. Electrical Engg.
Kayatri, M.S. Engineering Design
Pankaj, M.S. Electrical Engg.
Sumantra Chaudhuri, M.S. Electrical Engg.
Projesh Basu, M.S. Electrical Engg.
Nikhil Kumar CS, M.S. Electrical Engg.

Instructor :-
Dr. Ananth Krishnan
Assistant Professor
Department of Electrical Engineering
Indian Institute of Technology Madras
http://www.ee.iitm.ac.in/~ananthk

Description :-
The 1D TEM wave is x-directed z-polarized TEM wave containing the y-directed magnetic field Hy and z-directed electric field Ez. The time update in Yee Algorithm is done using Leapfrog time-stepping. Here, the H fields are updated every half time-step and E fileds are updated every full time-step. This is shown by two alternating vector updates spanning entire spatial grid inside a main for-loop for time update spanning the entire time-grid. Yes, there are No For Loops except for time steps. The vector updates span only a part of spatial grid where the wave, starting from source, has reached at that particular time instant (exploiting sparse vectors) avoiding field updates at all points in the grid which is unnecessary at that time instant. The spatial and temporal parameters are not unit less and are given real values. Mostly parameters of free space are used except that very less electrical and magnetic conductivities of 4 x 10^4 units are incorporated. The boundary condition here is Mur's Absorbing Boundary Condition (ABC) where the fields at the grid points have electric field values formulated using Engquist Majda one way wave equations where the boundaries give a sense of absorbing the total field incident on them and reflecting none back to the domain.

Cite As

Computational Electromagnetics At IIT Madras (2021). Program15 1D FDTD with Mur's Absorbing Boundary Condition (https://www.mathworks.com/matlabcentral/fileexchange/34996-program15-1d-fdtd-with-mur-s-absorbing-boundary-condition), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2011a
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