New topologies for miniaturized horizontal corrugations

In this paper, novel soft/hard surfaces based in new geometries are presented. We analyze the properties of surface wave propagation through these structures made of printed modified strips. The new shapes for the strips are the coupled lines topology and the spiral one, both are provided with metalised via holes in a lateral position. The size reductions for new shapes when compared with strip-loaded surface are 14% and 23% respectively. The presented structures are very suitable to improve efficiency and to reduce mutual coupling in antenna applications.