what is your meaning? you can use floquet port and change the incident wave phase.

Azita Goudarzi

Can you give me an example design or simple steps. I tried a lot with online resources and but struck up.....

If you want to simulate a unit cell of the periodic structure, You should follow below steps

1-set the geometrical parameters and build the structure->z1

2-set the boundary conditions-> z2

(if you want to simulate phase change of S11,S12 you should change distance to reference plane)

3-you can determine number of floquet modes ->z3

4-you can change the type of the modes in "Frequency solver mode parameters" box ->z4

when you do that, you actually assign incident plane wave for floquet mode

you also need to set frequency range, materials, Background properties,.. properly

Mahmoud Fallah

Thanks for sharing and I will try it....

But I am trying in HFSS ......

In HFSS Software:

1-Set the geometrical structure FSS->r1

2-Create a rectangular prism around FSS-> r2

3-Hide FSS-right click- select face ->r3

4-Set the modes (number and type) and scan angle Theta and Phi ->r22

5-If you want to simulate phase change of S11,S12 you should change distance to reference plane in deembed setting->r23

6- You can locate the upper reference plane on the upper surface of FSS->r28

7- You can locate the lower reference plane on the lower surface of FSS->r29

Use floquet ports and periodic boundary conditions.

Thank you all... I will try to use floquet port with proper boundary conditions.

Floquet port with lattice pair boundary