DoYouLinux
Advanced Member level 4
Hi all,
Just a few questions in HFSS. As I ran Port Only simulation and I have found a suitable wave port dimension (only 1st mode propagates at the frequency of interest) for a microstrip line simulation. Then, by fixing to this optimum port dimension, I ran Port Only simulation again. Now, I set the number of modes in the wave ports to be 1 and 5, and I compared the results from these two settings.
I have found that, for 1 mode, the Zo of the port is equal to 54 Ohm, while for 5 modes, Zo became 50 Ohm ...
How does this difference come from ? And, on which case that I should rely on the result ??? I mean, is it necessary to change the number of mode to 1 after obtaining the port dimension that results in no propagation of higher order modes ??
Thanks a lot for every reply,
DYL
Just a few questions in HFSS. As I ran Port Only simulation and I have found a suitable wave port dimension (only 1st mode propagates at the frequency of interest) for a microstrip line simulation. Then, by fixing to this optimum port dimension, I ran Port Only simulation again. Now, I set the number of modes in the wave ports to be 1 and 5, and I compared the results from these two settings.
I have found that, for 1 mode, the Zo of the port is equal to 54 Ohm, while for 5 modes, Zo became 50 Ohm ...
How does this difference come from ? And, on which case that I should rely on the result ??? I mean, is it necessary to change the number of mode to 1 after obtaining the port dimension that results in no propagation of higher order modes ??
Thanks a lot for every reply,
DYL
