In this article, a geometrically simple, microstrip line‐fed planar monopole structure with slanting edge ground plane is designed to realize the dual‐band dual‐polarized operation. The proposed antenna consists of a rotated U‐shaped patch and an electromagnetically coupled L‐shaped parasitic radiating element. Owing to the combination of microstrip line‐fed radiating patch and a slanting‐edge rectangular ground plane on the opposite side of the substrate, the proposed dual‐band antenna can generate broad axial ratio bandwidth (ARBW) in the upper frequency band. The overall dimension of the prototype is only 32 × 32 × 1.6 mm³. The measured results validate that the proposed antenna has two operational frequency bands, 29.84% (1.54‐2.08 GHz) for linearly polarized radiation and 71.85% (3.96‐8.4 GHz) for circularly polarized radiation. Measured result shows that 3‐dB ARBW of the proposed antenna is 73.54% (3.80‐8.22 GHz) in the higher frequency band. It shows that the higher frequency band exhibits a left‐hand circularly polarized radiation in the boresight direction.

中文翻译：

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适用于宽轴比带宽应用的双频双极化紧凑型平面单极天线

本文设计了一种几何简单的，微带线馈电的平面单极结构，具有倾斜的边缘接地平面，以实现双频双极化工作。拟议的天线由旋转的U形贴片和电磁耦合的L形寄生辐射元件组成。由于微带线馈电辐射贴片和基板相对侧上的倾斜边缘矩形接地平面的组合，所提出的双频天线可以在较高频段产生宽的轴向比率带宽（ARBW）。原型的整体尺寸仅为32×32×1.6 mm ³。测量结果验证了所建议的天线具有两个工作频带，线性极化辐射为29.84％（1.54-2.08 GHz），圆极化辐射为71.85％（3.96-8.4 GHz）。测量结果表明，所建议天线的3 dB ARBW在较高频带中为73.54％（3.80-8.22 GHz）。它表明较高的频带在视轴方向上表现出左旋圆极化辐射。