I have another question regarding the relation between the thickness of the substrate and reflection phase of FSS.I have observed different results for different thickness i.e. the thickness of 1.6mm phase is changing  +180 to -180 and extends more than -200 by adding the phase progressively, whereas with the thickness of 0.8mm it is changing from +180 to +100  and then suddenly rises to +235 degrees at the resonance frequency.Then after again decreasing as the frequency increases,  but overall this value is having positive phase.

Can anyone explain the reason?

Similar questions and discussions