Mushroom-type electromagnetic bandgap (EBG) structures are known to operate as high-impedance surfaces at low-frequency bands. They are broadly used in the microwave regime. However, one of the main drawbacks of mushroom-type EBG structures is their narrow bandwidth. In this article, we propose a mushroom-type EBG structure with glide-symmetric edge vias to increase the operational bandwidth. This bandwidth increment is explained by the physical insight provided by an equivalent circuit model of the structure as well as the description of the field behavior. Simulation and measurement results show an improvement of approximately 67% over the case without glide symmetry in the structure. We conclude that applying glide symmetry to the mushroom-type EBG structures can improve their bandwidth without adding additional manufacturing costs.

中文翻译：

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具有滑动对称性的蘑菇型EBG结构带宽的增加

众所周知，蘑菇型电磁带隙 (EBG) 结构在低频段用作高阻抗表面。它们广泛用于微波领域。然而，蘑菇型 EBG 结构的主要缺点之一是其带宽窄。在本文中，我们提出了一种带有滑动对称边缘通孔的蘑菇型 EBG 结构，以增加操作带宽。这种带宽增量可以通过结构的等效电路模型提供的物理洞察力以及场行为的描述来解释。仿真和测量结果表明，与结构中没有滑动对称性的情况相比，性能提高了大约 67%。我们得出结论，将滑动对称应用于蘑菇型 EBG 结构可以提高其带宽，而不会增加额外的制造成本。