Abstract In this paper a wideband, flexible, and novel structured double negative (DNG) metamaterial is designed for S, C, X, and Ku microwave applications. The 12 mm × 12 mm sized metamaterial is fabricated on a flexible FR4 substrate with thickness 0.25 mm. The metamaterial shows a total wide DNG region of 8.2 GHz (3.8–4.3 GHz and 6.8–14.5 GHz). The transmission coefficient of the unit cell has a total band gap bandwidth of 8.3 GHz from frequency range 2 to 16 GHz. The designed metamaterial also exhibits an extra-large and continuous negative refractive index (NRI) bandwidth of 13 GHz (2–15 GHz). The stop band regions along with DNG and NRI regions individually cover S, C, X, and Ku microwave regions. The complete analysis is done using CST microwave studio. The simulated and measured transmission coefficient curves of the proposed metamaterial are in good agreement. The structure is simple, cost effective, flexible, light weight, and wideband covering S, C, X, and Ku microwave spectra.

中文翻译：

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一种用于 S、C、X 和 Ku 波段应用的改良菱形柔性宽带双负 (DNG) 超材料

摘要 本文设计了一种用于 S、C、X 和 Ku 微波应用的宽带、柔性、新型结构双负 (DNG) 超材料。12 mm × 12 mm 尺寸的超材料制造在厚度为 0.25 mm 的柔性 FR4 基板上。超材料显示了 8.2 GHz（3.8-4.3 GHz 和 6.8-14.5 GHz）的总宽 DNG 区域。晶胞的传输系数在 2 至 16 GHz 的频率范围内具有 8.3 GHz 的总带隙带宽。设计的超材料还具有 13 GHz (2-15 GHz) 的超大和连续负折射率 (NRI) 带宽。阻带区域以及 DNG 和 NRI 区域分别覆盖 S、C、X 和 Ku 微波区域。完整的分析是使用 CST 微波工作室完成的。所提出的超材料的模拟和测量的透射系数曲线非常吻合。该结构简单、经济、灵活、重量轻，覆盖S、C、X、Ku微波谱的宽带。