A new EBG (Electromagnetic Band Gap) structure with chiral crank elements is presented and its effects on the electric field propagation along a microstrip line are analysed and compared with the effects produced by mushroom-type inclusions. Chiral crank inclusions are distributed along both sides of the strip and the corresponding results are compared with those obtained by other elements commonly used to create EBG media, mushroom-type structures. A single row of high chirality structures on both sides of a transmission line produces a band gap with a wider bandwidth than that obtained by the inclusion of other elements commonly used to create EBG media, such as mushroom-type structures. Unlike what happen with mushroomtype inclusions, more rows of chiral elements do not change significantly the central frequency and bandwidth of the band gap. The proposed structure works in X-Band (8.2-12.4 GHz) and it is easily adaptable to other frequencies by changing the size of the crank inclusions. Several samples have been made in FR-4 printed circuit board and a good agreement has been found between numerical analysis and experimental measurements.

中文翻译：

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基于曲柄手征结构的电磁带隙介质设计

提出了一种具有手性曲柄元件的新型 EBG（电磁带隙）结构，分析了其对沿微带线电场传播的影响，并与蘑菇型夹​​杂物产生的影响进行了比较。手性曲柄夹杂物沿条带的两侧分布，并将相应的结果与通常用于创建 EBG 介质、蘑菇型结构的其他元素所获得的结果进行比较。传输线两侧的单排高手性结构产生的带隙带宽比通过包含通常用于创建 EBG 介质的其他元素（例如蘑菇型结构）获得的带宽更宽。与蘑菇型夹​​杂物不同的是，更多的手性元素行不会显着改变带隙的中心频率和带宽。所提出的结构适用于 X 波段 (8.2-12.4 GHz)，并且可以通过改变曲柄夹杂物的大小轻松适应其他频率。已经在 FR-4 印刷电路板上制作了几个样品，并且在数值分析和实验测量之间发现了良好的一致性。