GaAs Spoof Surface Plasmon Polariton Half-Mode Substrate Integrated Waveguide

Abstract

A spoof surface plasmon polariton (SSPP) half-mode substrate integrated waveguide (SIW) is proposed by GaAs processing technique. Due to the strong field confinement of the SSPP propagation, as compared to the traditional solutions, the proposed solution shows better suppression to the self-generated coupling signal, which can be used to reduce the occupied areas of integrated circuits. Compared with existing SSPP-SIW structures, the proposed one is developed from GaAs techniques for the first time with the advantage of reduced size. And the proposed idea has the advantages of lower coupling due to the strong confinement of the SSPPs. To verify the proposed idea, such structure is designed, fabricated, and measured showing SSPP propagation and better coupling-suppression features.