Dual band planar soft surfaces using interleaved ledges

The design of dual band planar soft surfaces using interleaved ledges is introduced. Three parameters are utilized to create two frequency bands for surface waves suppression. The proposed structure is miniaturized compared with conventional dual band planar soft surfaces. The new structure is made with strips of interleaved ledges pattern printed over a grounded dielectric slab. Dual band is created by changing the strip width, via position and the period of the interleaved ledges.