In this article, a slow wave (SW) ridged half-mode substrate integrated waveguide (RHMSIW) combined with spoof surface plasmon polaritons (SSPPs) structure is proposed. The SW feature is achieved by integrating the SSPP structure into the metal ridge of RHMSIW. Besides, the proposed structure has a compact lateral size because the ridge of the RHMSIW introduces a step capacitance in the waveguide. Due to the loading of the SSPP structure, the proposed RHMSIW-SSPP structure has the ability of strong electric field confinement. Compared with the RHMSIW structure, the proposed RHMSIW-SSPP structure has a low crosstalk feature. A prototype of the proposed RHMSIW-SSPP structure with band-pass 4.5–14 GHz is designed and fabricated under PCB process. The proposed RHMSIW-SSPP structure reduces the longitudinal size over 50% and the lateral width by 40% compared with the HMSIW, and reduces the longitudinal size over 50% and the transverse width by 70% compared with the SIW. Therefore, the proposed structure has potential applications in miniaturized microwave and RF systems.

中文翻译：

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具有欺骗表面等离子体激元的慢波脊半模基板集成波导

在本文中，提出了一种慢波 (SW) 脊状半模衬底集成波导 (RHMSIW) 与欺骗表面等离子体激元 (SSPP) 结构相结合的方案。SW 特征是通过将 SSPP 结构集成到 RHMSIW 的金属脊中来实现的。此外，所提出的结构具有紧凑的横向尺寸，因为 RHMSIW 的脊在波导中引入了阶跃电容。由于 SSPP 结构的负载，所提出的 RHMSIW-SSPP 结构具有强电场限制能力。与 RHMSIW 结构相比，所提出的 RHMSIW-SSPP 结构具有低串扰特性。在 PCB 工艺下设计和制造了所提出的 RHMSIW-SSPP 结构的原型，其带通为 4.5-14 GHz。所提出的RHMSIW-SSPP结构与HMSIW相比，纵向尺寸减小了50%以上，横向宽度减小了40%，与SIW相比，纵向尺寸减小了50%以上，横向宽度减小了70%。因此，所提出的结构在小型化微波和射频系统中具有潜在的应用。