Adding BST ferroelectric to HFSS

[mina.nms]

Hi
I need to add the barium strontium titanate(BST)thin film to HFSS,
how should I do?

 

[tallface65]

Create a material with the correct magnetic and electric material properties. Select a surface where the thin film will be applied and apply a layered impedance boundary condition. Enter the thickness and the user defined material along with the substrate material, ie copper. It is of note that HFSS can only support linear magnetic material...which is usually fine for ferrites, but I do not know for your material...ensure there is no significant variance in the B-H curve for the current magnitudes of interest.

have fun

 

[mina.nms]

Thanks
but in library of HFSS there is a ferrit material as a default
I think the problem of nonlinear magnetic material in HFSS is for ferromagnetics not ferroelectrics
Is it correct?

 

[tallface65]

Ahh...I misread the post. I was thinking ferromagnetic material. However, a ferroelectric material is analogous in that the D-E curve is non linear and actually has hysteresis rather than the B-H curve. Since HFSS is a linear EM solver, any non-linearity in the materials cannot be accounted for. You will need a solver that can support non-linear materials with an ability to input a D-E curve.

have fun

 

[SagSag]

hey

can't you add a function to the D-E curve?

 

[tallface65]

hey

can't you add a function to the D-E curve?

HFSS is a linear solver...so the only function is a linear function between D and E.

 

[mina.nms]

for making a material(linear material) in HFSS
Is it enough to import its permittivity and loss tangent only?
are the other information important for situation of resonant frequency in S21 curve or not?
Thanks