I think just drawing the dispersion diagram of the structure can help us.Because radiating and guiding mode can be illustrated. Is there any response??
Yes, dispersion diagram is one of the technique where you can validate the CRLH MTM. Another approach is the parametric analysis; if by varying the different dimensions your one of the frequency is not changed you can consider as zeroth order resonance provided you are designing CRLH TL. this zeroth order resonance is compulsory property of the CRLH TL..