In this paper, a compact stepped slot antenna for ultra-wideband (UWB) applications is proposed. A very small size and UWB bandwidth operation are achieved by integrating a stepped slot in the back side of the antenna. This stepped slot is excited by using a 50 Ω-feed line in the top side of the antenna. The antenna is characterized by an impedance bandwidth between 3.05 GHz and more than 12 GHz. The dimensions of the antenna are 17 mm × 8 mm × 1.27 mm, which leads to the most compact size compared with other works in the literature. The integrated stepped slot is divided into additional elementary slots, where each elementary slot has a matching point. Adding these elementary slots allows to increase further the operating bandwidth. The radiation pattern of the compact stepped slot antenna is omnidirectional in the H-plane and bidirectional in the E-plane. The measurement results agree well with the simulated ones in terms of impedance matching and radiation pattern.

在本文中，提出了一种用于超宽带 (UWB) 应用的紧凑型阶梯缝隙天线。通过在天线背面集成阶梯槽，实现了非常小的尺寸和 UWB 带宽操作。这个阶梯槽通过在天线顶部使用 50 Ω 馈线来激发。该天线的特点是阻抗带宽介于 3.05 GHz 和超过 12 GHz 之间。天线的尺寸为 17 mm × 8 mm × 1.27 mm，与文献中的其他作品相比，这导致了最紧凑的尺寸。集成的阶梯槽被划分为附加的基本槽，其中每个基本槽都有一个匹配点。添加这些基本时隙允许进一步增加操作带宽。紧凑型阶梯缝隙天线的辐射方向图在H方向是全向的平面和E平面中的双向。测量结果在阻抗匹配和辐射方向图方面与模拟结果非常吻合。