Hello,
My question is concerning the implementation of a parallel-plate waveguide (PPW) using 2D FDFD. I am using the total-field/scattered field method in the paper attached by Rumpf. One way to implement the PPW is to define two PEC objects (by modifying the epsilon matrix on the grid) and specify the total-field between the two objects using the Q matrix to excite the right modes. Is there a way to implement this where the PECs are defined as surfaces or boundary conditions instead of objects?
Maybe this link useful
https://www.youtube.com/watch?v=4_O3gQEkydw
Regards
Thank you Ijaz Durrani
and Ahmed Ramadhan Al-Obaidi for your suggestions.
I think the method depends on how you are using the waveguide and what you want to learn. Do you want to calculate the modes that this waveguide would support? If so, the link pointed out by Ahmed is perfect. However, that is a rigorous analysis. If the PPW is to be used as a microwave transmission line, it may be perfectly valid to analyze it using an electrostatic approximation. Under Topic 10 at the following link I provide a MATLAB function tlcalc() to analyze many different types of transmission lines.
https://empossible.net/academics/emp3302/
You might also want to simulate waveguide circuits and look at different waveguide discontinuities. This is actually a large 3D problem. Consider using finite-element or finite-difference time-domain. Here are some links to start learning FDTD:
https://empossible.thinkific.com/courses/1D-FDTD
https://empossible.net/academics/emp5304/
Hope this helps!!
I wanted to add that I have created a new resource for learning and implementing finite-difference frequency-domain (FDFD). It has an entire chapter on waveguide analysis. While I do not cover the parallel plate waveguide, it is a simple tweak to the codes to do this. Here is a link to the book website that also has complete MATLAB codes:
https://empossible.net/fdfdbook/
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