Dear all:
I am working on a Frequency selective surface(FSS) structure where it is needed to identify its pass and stop bands using S11 and S21 coefficients .
To double check my simulation set up in CST MWS, I re-simulated the published work, in which they positioned the resonator structure inside a hallow wave guide but i am getting different results. Their simulation set up is: perfect electric and perfect magnetic boundaries in the directions orthogonal to the direction of propagation, and they used a plane wave as an excitation source to get the S-parameters. I wonder how is it possible to get S-parameters using a plane wave excitation? or i am missing something out?
Here is what i did to get S-parameters: PEC and PMC boundaries in the directions orthogonal to the direction of propagation, and two wave guide ports in the propagation direction.
The reference paper title is: "Isolation Enhancement in
Dual-Band Microstrip Antenna Array Using
Asymmetric Loop Resonator" which can be accessed through IEEE.org.
Thanks in advance.
Thank you very much both Alpha Bah and M N SUJATHA GUDU:
Actually i did what you both suggested in frequency domain and transient solvers. I also tried suspended transmission line method, i get somewhat similar results with a slightly widened stopband bandwidth compared to the reference. that is why i was interested in the waveguide method which is exactly the technique they used to extract the S-parameters. I found out the same question has been asked in the past on this wonderful platform, sadly no good answer so far.
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