Hi Poddar, 

If CST can do such work, you can export the HFSS model as a SAT file, and then in the CST import the file to do numerical simulation. However, I don't think this automatically equivalent circuit is accurate. Such equivalent circuit just has the same network response whithin a frequency range with the 3D model, but it is not real equivalent circuit in many cases. The every elements in a real equivalent circuit and the relationship between the circuit elements should have clear phycial meaning, which is determined by the complicated  EM coupling between the 3D structure and the incident EM wave. 

Good Luck！

Thank you very much for your answer and clarification.

Hello!

If you have data for your exact figure, received from CST or HFSS, you can directly call the data in CST in different ways and form the structure, but it may possible that frequency relationship, mesh sizes, and other valid information has been lost. Best way to implement structure separately. 

This is just suggestion to remove all erroneous calculations.

Thanks,

Hi,

Thank you very much for your information. Can you suggest me some references for better understanding of impedance matching and equivalent circuit diagram analysis?

Derest Mr Swadesh

hope this slide could help you

ali

Thank you for your answer. 

Images are not clear and not possible to zoom in to detail visible range.