3D FDTD codes cylindrical coordinate

• Feb 19, 2004

• #1

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Riyad

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fdtd maple

Hi

I am actually trying to write some 3D FDTD codes in matlab concerning the evaluation of the performance of a PIFA antenna. Well I got stuck in writing the codes from scratch. Can you please help me on where I could urgently find these codes on the net?

 

• Feb 19, 2004

• #2

boy

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Re: 3D FDTD codes in matlab

3D FDTD in matlab gonna run forever to get the results. you may need to write in C/Fortran.

 

• Feb 19, 2004

• #3

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danielwood

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If you want to find some FDTD codes, you can go to

[1]www.fdtd.org
[2]emlib.jpl.nasa.gov
[3]www.borg.umn.edu/toyfdtd/

 

• Feb 27, 2004

• #4

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wang peng

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Re: 3D FDTD codes in matlab

Hi,
Matlab though being a powerful tool .yet tis still hard to find numerical method code on it for the present time .
There is a 1-D sample code in the attachment . If it can help ...

Good courage .

 

• Feb 27, 2004

• #5

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Rachel006

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i am learning FDTD now,but i find it is difficult to make mesh in a complex enviroment.

 

• Feb 29, 2004

• #6

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maple

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Re: 3D FDTD codes in matlab

A. Taflove's book(2nd edition) includes some wonderful FDTD codes in matlab, you can download it.

 

• Mar 2, 2004

• #7

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midnite

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Re: 3D FDTD codes in matlab

Hi,

in my experience if you use MATLAB to write your code it will result slower than a identical code for example in FORTRAN.

Midnite

 

• Mar 2, 2004

• #8

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Element_115

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Re: 3D FDTD codes in matlab

Hi Riyad
Here are some 2D matlab files.
Hope they can help. You can go to Matlabs
File Exchange website, It has a lot of stuff.
broken link removed
Good luck.

 

Last edited by a moderator: Feb 15, 2022

• Mar 5, 2004

• #9

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Riyad

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Re: 3D FDTD codes in matlab

Thanx for your help!

My FDTD codes seem to work...
Now I need to obtain the input impedance and the VSWR in order to obtain the bandwidth of my antenna!
I seen that the input impedance may be calculated by fourier transform of the voltage and current. But how can this be done??? At what instant of time should I measure the voltage and current?
Thanking you in advance!

 

• Apr 9, 2010

• #10

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chyzh1160

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3D FDTD codes in matlab

FDTD_3d for cylindrical coordinate

 

• Jan 20, 2012

• #11

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jayv

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Re: 3D FDTD codes in matlab

chyzh1160 said:

FDTD_3d for cylindrical coordinate

Click to expand...

r u doing project on fdtd ?? i m also doing on t same ..... could u brief it ur project ???



regards


jayv

jayv

 

• Jan 20, 2012

• #12

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thorsten

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Re: 3D FDTD codes in matlab

Hi,

on openEMS.de you can download a free (GPL) FDTD software for Cartesian and Cylindrical Coordinates. It is wirtten in C++ (for high speed) and has a Matlab-Interface to define and evaluate the structures.
It also has subgrids to increase the timestep for a cylindrical mesh...

Maybe you give it a try.

In case of trouble you may want to use the openEMS-Forum.
The method used by openEMS is EC-FDTD <-- you have to answer this question to register...

regards
Thorsten

 

• Jan 31, 2012

• #13

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jayv

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Re: 3D FDTD codes in matlab

hi sir could u suggest me an idea for writing code to simulate the field equations of cts antenna array using fdtd ????


regards


jayv

 

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• stubstructure.bmp

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