nelsonys
Member level 4
I am trying to model HFSS in order to get good agreement with the measurement results.
As we know, SIwave has its own method of forcing the boundary condition to maintain the TEM mode of the pcb, and it saves a lot of times and technical issues by giving a highly accurate simulation results for pcb structure.
For HFSS, it is no more easy as we need to figure out how to correctly set the lumped port, boundary conditions, error of tolerance, etc.
As in the attachment, I have tried hard to try to get results for a microstrip line in HFSS as close to SIwave as possible.
In SIwave, by forcing the solution frequency to 20GHz, the mesh gets finer, and we could get significant dip at each resonant frequencies.
But in HFSS, no matter how I changed the boundary conditions (lambda/4 or 10 times the dielectric thickness), or even make the lumped port as wide as possible, deembed the lumped port, set the error of tolerance for interpolating sweep to as low as 0.1%, the result is still a smooth wave as if there's reflection going on.
How should I correct my HFSS model in order to have a good agreement with SIwave result?
Thanks in advance.
- - - Updated - - -
I have no idea how should I set my boundary conditions to maintain TEM or even quasi-TEM of my microstrip line
As we know, SIwave has its own method of forcing the boundary condition to maintain the TEM mode of the pcb, and it saves a lot of times and technical issues by giving a highly accurate simulation results for pcb structure.
For HFSS, it is no more easy as we need to figure out how to correctly set the lumped port, boundary conditions, error of tolerance, etc.
As in the attachment, I have tried hard to try to get results for a microstrip line in HFSS as close to SIwave as possible.
In SIwave, by forcing the solution frequency to 20GHz, the mesh gets finer, and we could get significant dip at each resonant frequencies.
But in HFSS, no matter how I changed the boundary conditions (lambda/4 or 10 times the dielectric thickness), or even make the lumped port as wide as possible, deembed the lumped port, set the error of tolerance for interpolating sweep to as low as 0.1%, the result is still a smooth wave as if there's reflection going on.
How should I correct my HFSS model in order to have a good agreement with SIwave result?
Thanks in advance.
- - - Updated - - -
I have no idea how should I set my boundary conditions to maintain TEM or even quasi-TEM of my microstrip line