Reply to thread

Hello,

I think the Aluminium is the problem...

I have tried a single ended simulation, using Aluminium and FR4 :

 - Using FR4, I got coherent values with Polar

 - Using Aluminium, I got non coherent value !

I think it's because the aluminium is treated like a PEC by HFSS and it "block" the electric field of the lumped port wich normally tell how is the field for boundary condition ? Any idea to resolve this ??

Thanks so much again

[ATTACH=full]195064[/ATTACH][ATTACH=full]195063[/ATTACH]

[automerge]1730551322[/automerge]

By modifying the "Bulk conductivity" of Aluminim to 0, I got now good result :

But can I use this tips ? I don't know if using a 0 bulk conductivity for aluminium instead of the real value will induce bad results for S-parameters ???

[ATTACH=full]195065[/ATTACH]

I dont know if HFSS or Polar give the right value when using Aluminium ....