Abstract In the present article authors propose the design and analysis of an octagonal shape multiband metamaterial loaded antenna with implementation of hybrid fractal geometry for wireless applications. Multiband features in the antenna structure is realized by applying the slotted and hybrid fractalization of Moore and Koch curve approach in radiating section along with introduction of two metamaterial SRR cells. The frequency band reconfigurability characteristics in proposed design is achieved by placing the PIN diode inside the connecting strip between the central hybrid fractal geometry and feedline. During forward bias condition of PIN diode antenna structure resonates at hepta (seven) band mode at WiMAX (3.5 GHz)/Lower C-band (4.41 GHz)/WLAN (5.4/5.8 GHz)/Lower X-band (8.26 GHz)/Upper X-band (10.48 GHz)/Lower Ku-band (13.35 GHz)/Middle Ku-band (14.42 GHz) wireless standards with S 11 ≤ −10 dB. Proposed antenna represent the hexa and hepta band features during reverse bias (OFF-state) and forward bias condition (ON-state) of PIN diode respectively. A stable and consistent radiation patterns, appropriate impedance matching and an acceptable gain are achieved at all the operating frequencies of the proposed antenna.

中文翻译：

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一种用于具有频带可重构特性的无线应用的超材料加载混合分形多频带天线

摘要 在本文中，作者提出了一种八边形多频带超材料加载天线的设计和分析，该天线在无线应用中实现了混合分形几何。天线结构中的多频带特征是通过在辐射部分应用摩尔和科赫曲线方法的开槽和混合分形以及引入两个超材料 SRR 单元来实现的。通过将 PIN 二极管放置在中央混合分形几何形状和馈线之间的连接带内，可以实现所提议设计中的频带可重构特性。在 PIN 二极管天线结构的正向偏置条件下，在 WiMAX (3.5 GHz)/较低 C 频段 (4.41 GHz)/WLAN (5.4/5.8 GHz)/较低 X 频段 (8.26 GHz)/ 的七（七）频段模式下谐振上 X 波段 (10.48 GHz)/下 Ku 波段 (13. 35 GHz)/中 Ku 频段 (14.42 GHz) 无线标准，S 11 ≤ −10 dB。提议的天线分别代表 PIN 二极管在反向偏置（OFF 状态）和正向偏置条件（ON 状态）期间的六和七波段特征。在建议天线的所有工作频率下都实现了稳定和一致的辐射模式、适当的阻抗匹配和可接受的增益。