A slow-wave (SW) effect enhancement method based on substrate integrated waveguide (SIW) is presented, theoretically studied, and experimentally validated. The SW effect is achieved by incorporating multi-antipodal metalized blind via-holes and distributed metal strips longitudinally connecting the bottom of upper posts. This improved SIW-based topology achieves a dramatic cutoff frequency reduction of 55.5% with reference to the conventional SIW with the same lateral size. Meanwhile, the phase velocity is reduced remarkably, realizing a more compact longitudinal dimension. The two effects give rise to a planar size reduction of 80% compared to the conventional SIW, which presents a significant advance in SIW miniaturization technology. A prototype is fabricated for a proof-of-concept, and the measured results are in good agreement with simulations, demonstrating its promising application potential and prospect in the microwave and millimeter-wave components.

中文翻译：

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具有多对足盲孔和分布式金属条的慢波效应增强型基板集成波导

提出了一种基于衬底集成波导 (SIW) 的慢波 (SW) 效应增强方法，并对其进行了理论研究和实验验证。SW 效应是通过结合多对映金属化盲通孔和纵向连接上柱底部的分布式金属条来实现的。与具有相同横向尺寸的传统 SIW 相比，这种改进的基于 SIW 的拓扑实现了 55.5% 的截止频率显着降低。同时，相速度显着降低，实现了更紧凑的纵向尺寸。与传统的SIW相比，这两种效应使平面尺寸减小了80%，这代表了SIW小型化技术的显着进步。为概念验证制造原型，