Dataset of Chao Wang for AWPL

This letter presents a wideband millimeter-wave (mmW) endfire circularly polarized (CP) antenna intensified by a metasurface to improve performance. The antenna element integrates a pair of horizontal electric dipoles with two vertically oriented substrates, simultaneously exciting two orthogonal electric-field components. Additionally, two diamond-shaped metasurface arrays are embedded into the substrates to optimize the amplitude and phase balance between the horizontal and vertical components. This configuration not only broadens the axial ratio (AR) bandwidth but also reduces the thickness of the vertical substrates. To further increase the gain, a linear 1\u00d78 endfire CP antenna array has been designed and fabricated. The entire structure is fabricated using printed circuit board (PCB) technology. Measured results demonstrate a -10 dB impendence bandwidth of 35.52%, a 3 dB AR bandwidth of 34.69%, and a peak gain of 16.15 dBi. Owing to its compact profile and excellent performance, the proposed endfire CP antenna array is a promising candidate for wideband mmW wireless communication systems.

本文提出一种经超表面（metasurface）增强的宽带毫米波（millimeter-wave, mmW）端射式圆极化（circularly polarized, CP）天线，以提升其性能。该天线单元将一对水平电偶极子与两块垂直取向的基板相集成，可同时激发两路正交电场分量。此外，两块菱形超表面阵列嵌入基板中，用于优化水平与垂直电场分量间的幅度与相位均衡。该结构不仅拓宽了轴比（axial ratio, AR）带宽，还减小了垂直基板的厚度。为进一步提升增益，研究人员设计并制备了一款1×8线型端射式圆极化天线阵列。整个结构采用印制电路板（printed circuit board, PCB）工艺加工制备。实测结果表明，该天线的-10 dB阻抗带宽达35.52%，3 dB轴比带宽达34.69%，峰值增益为16.15 dBi。得益于紧凑的剖面结构与优异的综合性能，本文提出的端射式圆极化天线阵列有望成为宽带毫米波无线通信系统的理想候选方案。