SRR- and CSRR-based Metamaterial Transmission Lines: Modeling and Comparison

This paper is focused on the comparison between the two main categories of resonant-type metamaterial transmission lines: those based on split ring resonators (SRRs) and those based on their complementary counterparts, that is, complementary split ring resonators (CSRRs). It will be shown that both SRR- and CSRR-based metamaterial transmission lines exhibit a very similar behavior, and this analogous behavior has been explained on the basis of the equivalent circuit model of the unit cell of these lines and from duality arguments.