methods to find the effective parameter of metamaterial

i think that the best method to find the effective parameter of metamaterial is the hybrid method that use cavity resonator
what's your idea?

salam gaban
manam farad
migam to bayad sare sjh ra bekhori ta befahmi
albate in nazare mana

Added after 1 minutes:

bazam salam
dastam ra nakhor
..... ra bekhor

speak in english plz....