I'm trying to simulate a unit cell of metamaterial in cst, first i gave frequency, then apply background in all direction, for boundary conditions, in one side e field and in other H field and one dimension is open . then apply plane wave, but i did not apply any port then started simulation but I can not get phase reflection and s11?
Please guide me step by step
i will be very thankful to you all
For unit cell modeling tou need to use periodic boundary, not H or open.
thank u so much ali
i m using latest version of cst ,so where i should simulate unit cell ,in unit cell design or in full structure design,if u plz the steps for simulate,one thing other that i just apply plain wave or also to apply port
when i apply periodic in all direction it give me"" When exciting with a plane wave, the calculation domain must contain open boundaries at the direction of incidence""
so after that i apply periodic in two direction and in the direction of incidence i select it open
but it again give me no result of s11 or permitivity etc
When you open CST, Go to "MW & RF & Optical", then you can go to "Periodic Structures", then you can decide to have Unit Cell or Full Structure.
You also might need Phase Reflection Diagram, and then you can choose between Time Damion or Frequency Domain solver.
You will have Floquet Boundaries for port definition.
thank u dear ali
u can help me how to design a unit cell for particular frequency ,suppose i want to desing a unit cell for 2.4Ghz ,then u can tell me about the formula to obtain the resonance frequency of 2.4 for unit cell desing,i mean formula to achieve negative permitivity and negative permeabilitty at 2.4
waiting for u help
thanks
Hi,
It all depends on the geometry. The rule of thumb is lambda/2 long length. You can find the available examples in CST website.
Hi,
If you want to get S11 and S21 for your unit cell, you have to apply waveguide port in the open boundaries and the other sides, as you said, must be E field and H field
There are two feeding methods
The first is Folquet Port.
The second using two waveguide port to feed the unit cell.
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