In this article, a single feed antenna design which consists of a parasitic patch slot with an I-tree shaped fractal defected ground structure for circularly polarized radiation is presented. In the proposed design, circular polarization characteristics are achieved by deploying fractal slotted defected ground structures. The antenna design with a third iterative I-tree shaped fractal slot on an Fr4 substrate is fabricated and tested for verifying the simulated results. The circular polarization mechanism is performed using parametric studies. The measured and simulated results confirmed that the proposed structure can adequately generate an impedance bandwidth of 10.6% with 3 dB axial ratio bandwidth of 4.89%, with the measured peak gain of the proposed antenna being 5.16 dBic. The proposed article is suitable for C-band and CA-band applications.

中文翻译：

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用于CA波段应用的使用I-tree分形缺陷接地结构的圆极化寄生贴片缝隙天线

在本文中，提出了一种单馈天线设计，该天线设计包括一个寄生贴片槽和一个用于圆极化辐射的 I-tree 形分形缺陷接地结构。在所提出的设计中，圆极化特性是通过部署分形开槽缺陷地面结构来实现的。制作并测试了在 Fr4 基板上具有第三个迭代 I-tree 形分形槽的天线设计，以验证模拟结果。使用参数研究执行圆极化机制。测量和仿真结果证实，所提出的结构可以充分产生 10.6% 的阻抗带宽和 4.89% 的 3 dB 轴比带宽，所提出的天线的测量峰值增益为 5.16 dBic。所提出的文章适用于 C 波段和 CA 波段应用。