A stepped planar microstrip structure is proposed and demonstrated as a candidate of the ultra-wideband (UWB) antenna in the paper. In the structure, two L-shaped slots are introduced into the rectangular microstrip patch to broaden the current path at both edges of the radiating patch. The impedance bandwidth of the antenna can be extended by using the stepped impedance resonator (SIR) structure at one end of the radiation patch and connecting with the feed line. The symmetrical two I-shaped slots are loaded on the SIR microstrip to improve in-band performance and further widen the operating band. The proposed new structure can have an improvement in the in-band characteristics while extending the operating bandwidth. A broadband impedance bandwidth of 2.39 GHz to 13.78 GHz at S11 < −10 dB is demonstrated based on the proposed novel structure. The reflection coefficient and radiation characteristics are characterized in the paper. The tiny antenna, with the benefit of small area 36 mm × 23 mm, shows potential applications in ultra-wideband communication systems, wireless energy harvesting systems, and other wireless systems.

中文翻译：

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L形槽载步进阻抗微带结构UWB天线。

本文提出了一种阶梯式平面微带结构，并作为超宽带（UWB）天线的候选者进行了演示。在该结构中，将两个L形槽引入矩形微带贴片中，以加宽辐射贴片两个边缘处的电流路径。天线的阻抗带宽可以通过使用辐射贴片一端的阶梯式阻抗谐振器（SIR）结构并与馈线连接来扩展。对称的两个I形槽被加载到SIR微带上，以改善带内性能并进一步加宽工作频带。所提出的新结构可以在扩展工作带宽的同时改善带内特性。基于所提出的新颖结构，在S11 <-10 dB时证明了2.39 GHz至13.78 GHz的宽带阻抗带宽。本文对反射系数和辐射特性进行了表征。这种纤巧的天线具有36 mm×23 mm的小面积优势，显示了在超宽带通信系统，无线能量收集系统和其他无线系统中的潜在应用。