Dispersion engineering with CRLH metamaterials

Composite right/left-handed (CRLH) metamaterials have demonstrated unique and advantageous features when employed in microwave and millimeter-wave circuits and systems. In this paper, an overview of the CRLH metamaterials is addressed by introducing the dispersion-engineerable property from the equivalent unit-cell circuit model. Thereafter, several examples based on the CRLH structures are examined to validate the feasibility and superiority of the proposed works in terms of the compactness and functionality which are found constrained using conventional materials.