An electrically small ultra-wideband antenna for modern compact devices is presented in this paper. The antenna is constructed using a low-cost FR4 substrate, where etching slot and stub loading techniques are utilized to achieve miniaturization. The antenna comprises of simple geometrical structure with an overall size of 0.13 λo × 0.19 λo × 0.02 λo (λo is the free-space wavelength at 3.5 GHz). A sample prototype was fabricated and tested to validate various performance parameters of the antenna. The antenna has measured 10 dB impedance bandwidth ranging from 3.55–12.16 GHz with a stable gain having a maximum value of 4.52 dBi. The performance comparison with state-of-the-art works shows that the proposed antenna offers the advantages of miniaturized size, simple geometry along with competitive bandwidth and stable radiation characteristics.

中文翻译：

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超宽带通信系统微型印刷天线的设计与表征

本文介绍了一种用于现代紧凑型设备的电小型超宽带天线。天线使用低成本的 FR4 基板构建，其中利用蚀刻槽和短线加载技术来实现小型化。天线由简单的几何结构组成，整体尺寸为 0.13 λo × 0.19 λo × 0.02 λo（λo 是 3.5 GHz 的自由空间波长）。制造和测试样品原型以验证天线的各种性能参数。该天线测量了 10 dB 阻抗带宽，范围为 3.55–12.16 GHz，具有最大值为 4.52 dBi 的稳定增益。与最先进工作的性能比较表明，所提出的天线具有尺寸小、几何结构简单、具有竞争力的带宽和稳定的辐射特性等优点。