Very nice simulation(s). Thanks for uploading them. By the way, how did you implement your source here? It seems to be a plane wave current source (impressed J). Also I guess you are using a spatial taper right? Finally, the source line is staircase approximated, right?
You know your FDTD. Yes, it is a plane wave current source of impressed J's. You are also very preceptive about the spatial taper (cosing taper), which helps to narrow the beam. And of course, it is on a rectangular grid, so it is necessarily stair-stepped.
I'm also working on a re-formulation of my old codes to include magnetic currents. These allow you to shoot energy in one direction and get rid of that annoying beam shooting out the rear.
hi,I'm a beginner on FDTD stuff, How did you implement the light beam source?
I only get a 2D FDTD code of matlab with plane wave source using the total-field/scattered-field approach. Could you give me some advice about this reflection simulation. Thanks!
You don't always have to use the TFSF technique. That is usually limited only to scattering problems. If you use soft sources, you can arbitrarily insert current sources anywhere in the simulation. Also, it helps to insert a cosine taper on the source, since this gives it better directivity.
hey pal I am desperately in need to a 2D TFSF TE code (FDTD MATLAM of course)! Can u please help? this is my email:
utee_student at yahoo.com
uteestudent 7 months ago
How the source is implemented here?
blusterhash 1 year ago
@blusterhash
They are impressed currents. You just add a source term into the update equations
nageljr 1 year ago
Hi, how do you implement the directional light beam?
Thanks!
observer2812 1 year ago
Very nice simulation(s). Thanks for uploading them. By the way, how did you implement your source here? It seems to be a plane wave current source (impressed J). Also I guess you are using a spatial taper right? Finally, the source line is staircase approximated, right?
Thanks
meyavuz 1 year ago
@meyavuz
You know your FDTD. Yes, it is a plane wave current source of impressed J's. You are also very preceptive about the spatial taper (cosing taper), which helps to narrow the beam. And of course, it is on a rectangular grid, so it is necessarily stair-stepped.
I'm also working on a re-formulation of my old codes to include magnetic currents. These allow you to shoot energy in one direction and get rid of that annoying beam shooting out the rear.
nageljr 1 year ago
hi,I'm a beginner on FDTD stuff, How did you implement the light beam source?
I only get a 2D FDTD code of matlab with plane wave source using the total-field/scattered-field approach. Could you give me some advice about this reflection simulation. Thanks!
tonyhaha1 1 year ago
@tonyhaha1
You don't always have to use the TFSF technique. That is usually limited only to scattering problems. If you use soft sources, you can arbitrarily insert current sources anywhere in the simulation. Also, it helps to insert a cosine taper on the source, since this gives it better directivity.
nageljr 1 year ago
hi, I'm wondering which software u choose to do the simulation of this wonderful reflection,
tonyhaha1 1 year ago
@tonyhaha1
I use Matlab for this stuff. If you can get your hands on it, Matlab is one of the greatest tools for such things.
nageljr 1 year ago
hey can u help me whit the code?
phylalis 2 years ago
I will have to take your word on this. :) I'm pretty.
BookofMormonReader 3 years ago
if you think this is wild, check out my quantum tunneling videos.
nageljr 3 years ago