In the proposed work, a miniaturised ultra-wideband tapered slot planar antenna with the aim of gain enhancement, working bandwidth containing lower frequency range, and improving antenna efficiency is presented. The proposed antenna consists of a slotted patch printed on the top layer of FR4 substrate with three 50-Ω resistors connected in the slotted arms and bottom layer consists of an optimized ground plane with a non-uniform parasitic patch which is used to achieve circular polarization in the frequency range of 2.4–2.6 GHz. The measured impedance bandwidth of the proposed antenna is 0.3–4 GHz with a peak gain of 3.2 dBi. The overall antenna efficiency is 83% and radiation patterns of the proposed design on different frequencies are shown to confirm the proposed antenna result, especially at lower frequencies. The proposed antenna can be used for the detection of artifacts in the deeper ground known as ground-penetrating radar applications.

中文翻译：

---

用于探地雷达应用的小型化超宽带矩形缝隙天线

在所提出的工作中，提出了一种小型化的超宽带锥形缝隙平面天线，其目的是提高增益，工作带宽包含较低的频率范围，并提高天线效率。所提出的天线由印刷在 FR4 基板顶层的开槽贴片组成，三个 50Ω 电阻连接在开槽臂中，底层由优化的接地平面组成，该接地层具有用于实现圆极化的非均匀寄生贴片在 2.4–2.6 GHz 的频率范围内。建议天线的测量阻抗带宽为 0.3-4 GHz，峰值增益为 3.2 dBi。整体天线效率为 83%，并且显示了所提议设计在不同频率上的辐射方向图，以证实所提议的天线结果，尤其是在较低频率下。