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s kappa the loss of the material? Is the 1e-3 part the loss tangent? Kappa is the conductivity of the material and yes the 1e-3 is the loss tangent indeed. I am not sure why it is multiplied by 2.45e9, especially when the simulation is supposed to cover +/- 1 GHz of the center frequency. If I were ...

In each simulation each active port is excited. If you want an s11 and s21, you have to active port 1 and deactivate port 2. For s22 and s12 you need ti do another simulation with port 2 active and port 1 inactive. If you excite port 1 and 2 and the coupling is very very small you could calculate s1...

You define the size of your (SAR) dump box as you would any dump box. Around the area that you are interested to observe your data (SAR).

Lots of questions. If I remember correctly the "L" part is not implemented/available for the lumped element. Only R and C. If you do not set any you get the warning and the element is ignored. As for the size, if should behave similar to reality. If it is too large it does not behave very good any m...

What is a 3 phantom model?
Have you looked at the tutorials covering SAR?
You should not use sinusexcite. It takes longer and is difficult to determine convergence.
1.5W/kg difference does not say anything....

Post your changes on github for me and others to review.

Yes you could, but sinus excite does not converge as nicely and you limit yourself to only this frequency without any/much benefit...

I have not yet looked at your data. But I guess you may go step by step and look at different stages of your polys. Make sure it is one continuous array of points and that inside and outside (left/right of the line) is always consistent... E.g. let matlab calculate the polygon area and make sure it ...

What about an "air" material with low priority. It should not hurt anything and you can use it to visualize whatever you want...

regards
Thorsten

Did you have a look at the corresponding harminv.m file that you should use? I personally have never used harminv and thus if the matlab file does not help you will have to refer to the harminv documentation.

regards
Thorsten