A Compact Coplanar Waveguide Spoof Surface Plasmon Polariton with Enhanced Field Confinements

In this article, a spoof surface plasmon polariton (SSPP) based on coplanar waveguide (CPW) with flipper structures is proposed to improve field confinement. The analyses based on the developed equivalent circuit (E.C) reveal that the proposed unit exhibits flexibly controllable dispersion features and improved field confinements owing to the introduction of the flipper structures. Finally, the proposed SSPP TL is designed, fabricated, and tested to validate the design principles. The experiment results illustrate the theoretical analyses and validate that the proposed SSPP TL exhibits ultra -compact size occupation and enhanced field confinement.