[SOLVED] open boundary condition in CST

[nematollahi]

hi
Do you know what is the optimum distance from air box in CST?
what is the best answer for adding space to open boundary condition?
when I use lambda/4 and lambda/2 in central frequency the answers are different.
thanks

 

[tes87]

The default in CST is lambda/6 for the center frequency and for me it works good. But in guides for HFSS i've read always lambda/4 and it works too.

 

[johnjoe]

Change the distance unless s-parameters don't change anymore.