in order to find the surface wave bandgap of periodic structure, the best method is to find the dispersion diagram of periodic structure using unit cell and eigen mode solver in CST.
i am just wondering does anybody successfully find the surface wave bandgap of EBG structure using this approach.
i will be obliged if someone uplaod his model and tell us how he has done it
secondly in some papers . people are using microstrip line over EBG structure and from S21 they are extracting surface wave bandgap.
i have doubt about this method . i mean is this method take into account both TE and TM wave bandgaps? if not what other method we can use to find the surface wave band gap of periodic structures
i hope many people will benefit if someone share his knowlege over here
Hi shahid78
I think the dispersion diagram of periodic structure using unit cell or eigen mode solver in CST only help u to find out the natural physical.
But the problem of EBG is application on the real.
When using EBG in application, for example: the antennas, u will see that EBG is more and more different and complex. However, with 3 classic model of EBG, u can research them on the real so easy.
It was using finite ebg structures and putting two ports at each sides. The boundary conditions are kept open space. This gives the results as practical measurment.