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meshing problem for power flow with a distorted wavefront

Posted May 31, 2012, 10:19 a.m. EDT RF & Microwave Engineering, Mesh Version 4.2a 0 Replies

Hongtao Zhang
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Hello,


My model is to calculate the R/T coefficients of two parallel gratings with an air gap between them. I obtained a correct result when I used a coarse meshing size. But this result is insufficient accurate for me.


However, there appears a distorted wave front for some specific parameters when I further fine the meshing size. (even I guess this distorted wave front may be correct). I use PML+power flow at two boundaries to calculate the R/T coefficients. I found the COMSOL can not provide a correct R/T coefficient in this circumstance.


I try to change the meshing size and different solvers. But they did not work for this problem.

I attached the code, several graphs and an explaination in this message.

Any suggestions are welcome.


thanks!

Hongtao



0 Replies Last Post May 31, 2012, 10:19 a.m. EDT
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Hello Hongtao Zhang

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