Musuroom_EBG_cell_in_CST

Hello All,

I am trying to simulate a unit cell of mushroom EBG in CST.

Why I have got too much ripple in the S11 plot with some values greater than one.

is the setting of my cst file correct?

Please help

any one?..................................

Hi,

Firstly, I have no experience on EBG simulation. However, you should note the following comments:

1. In your cst model, you didn't discretized your geometry. In the "Mesh-Global mesh properties-Lines per wavelength", and the local mesh properties of PEC and Rogers materials should be set up.

2. I don't know the reason why you set only one port. Generally, 2 ports are needed.

3. For boundary conditions, PEC+PMC for periodic boundary is right. So why use PEC for Zmin? I think it should be open. And a proper value for the distance between the port and the side of the cell should be used.

I hope the above comments are useful,
Zhang

I am still waiting for someone to hep me

Hi Mustafa,

Try to use AR filter option and use a great number of pulses in Steady state menu under specials for Transient solver.

good work

I know this is a very old post, but just for reference in this thread here's my suggestion.

Ripples can be due to accuracy setting in CST transient solver, if you set your accuracy to -40 or -50 you'll get better results (excitation signal will decay better causing less problem when doing Fourier transform)

Another solution might be looking at your mesh settings for increased accuracy (adaptive mesh refinement).

申明：网友回复良莠不齐，仅供参考。如需专业解答，请学习易迪拓培训专家讲授的CST视频培训教程。