This paper presents a novel ultra‐wideband (UWB) antenna printed on a 70 μm thick flexible substrate. The proposed antenna consists of a hybrid‐shaped patch fed by coplanar waveguide (CPW). The ground planes on opposite sides of the feeding line have different height to improve antenna bandwidth. Simulation shows that the proposed antenna maintain wide bandwidth when changing its substrate's thickness and dielectric constant, as well as bending the antenna on a cylindrical foam. The proposed antenna is fabricated in laboratory with a simple and low‐cost wet printed circuit board (PCB) etching technique. Measured bandwidths cover 3.06 to 13.58, 2.8 to 13.55, and 3.1 to 12.8 GHz in cases of flat state and bent with radii of 20 and 10 mm, respectively. Measured radiation patterns show the antenna is omnidirectional in flat and bent cases.

中文翻译：

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用于超宽带应用的共面波导馈电柔性天线

本文介绍了一种新颖的超宽带（UWB）天线，该天线印在70μm厚的柔性基板上。拟议的天线由共面波导（CPW）馈入的混合形状的贴片组成。馈线相对侧的接地平面具有不同的高度，以提高天线带宽。仿真表明，所建议的天线在改变其基板的厚度和介电常数时以及在圆柱形泡沫上弯曲天线时都能保持较宽的带宽。拟议的天线是在实验室中使用简单且低成本的湿式印刷电路板（PCB）蚀刻技术制造的。在平坦状态下，测得的带宽分别为3.06至13.58、2.8至13.55和3.1至12.8 GHz，并且弯曲半径分别为20和10 mm。测得的辐射方向图表明，在平坦和弯曲的情况下，天线是全向的。