Modern communication systems require an antenna with miniaturized size and large bandwidth with high data rate. In this article, a circular monopole antenna is presented with hexagonal patch on both sides of microstrip feedline and an I- shaped rectangular slot etched at the center of feedline to provide impedance matching. The modified loaded ground reduces the coupling between ground plane and radiation patch. This antenna has compact dimension of 30 mm × 25 mm with electrical size of 0.25λ × 0.20λ. This antenna has been designed and simulated in HFSS commercial software and fabricated on FR4 substrate of thickness 1.6 mm with relative permittivity 4.4, loss tangent of 0.02. The experimental results are compared with simulated one, which are in close agreement. It attains a frequency band ranging from 2.4 to 56.6 GHz with reflection coefficient <−10, percentage bandwidth of 183.72%, Bandwidth Ratio (BR) 23.58:1, and Bandwidth Dimension Ratio (BDR) of 3674.40. The peak gain and radiation efficiency of this antenna is 12.77 dBi and 98.82% at 45.84 and 5.6 GHz respectively. Time domain analysis has been done, which proclaims that the proposed antenna has SWB characteristics. It may be useful for high data rate transmission, medical imaging, and other SWB applications.

中文翻译：

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具有改进的接地平面的圆形单极天线，表明 SWB 特性

现代通信系统需要具有小型化尺寸和大带宽以及高数据速率的天线。本文介绍了一种圆形单极天线，在微带馈线两侧带有六角贴片，在馈线中心蚀刻有 I 形矩形槽以提供阻抗匹配。修改后的负载接地减少了接地层和辐射贴片之间的耦合。该天线具有 30 mm × 25 mm 的紧凑尺寸，电气尺寸为 0.25λ× 0.20λ。该天线已在 HFSS 商业软件中设计和模拟，并在厚度为 1.6 mm 的 FR4 基板上制造，相对介电常数为 4.4，损耗角正切为 0.02。将实验结果与模拟结果进行了比较，结果非常吻合。它的频段范围为 2.4 至 56.6 GHz，反射系数 <-10，带宽百分比为 183.72%，带宽比 (BR) 为 23.58:1，带宽维度比 (BDR) 为 3674.40。该天线在 45.84 和 5.6 GHz 时的峰值增益和辐射效率分别为 12.77 dBi 和 98.82%。已完成时域分析，表明所提出的天线具有 SWB 特性。它可能对高数据速率传输、医学成像和其他 SWB 应用很有用。