Interdigital CPW Metamaterial Surfaces for Modern Wireless Communication Systems

This paper proposes the design of metamaterial surfaces based on interdigital coplanar waveguide (CPW) unit cells. By using this technique, the unit cell can have negative permeability with size reduction to λ/8. The result causes from the slow wave effect on transmission line in the structure, which electrical and physical lengths of transmission line are not equal from that effect. The proposed matamaterial surfaces at some resonant frequencies have been designed and used as reflectors and directors applied for antenna applications. Using the designed reflectors or directors, the antenna performances have been increased. The proposed metamaterial surfaces will be appropriate for modern wireless communication systems.