A novel wideband circularly polarized (CP) antenna array is designed, which consists of a horizontally placed wideband phase shifting feed network and four vertically placed linearly polarized dipole antenna elements, and the circular polarization is realized based on sequential rotation feeding technology. By placing two parasitic strips and two grounding strips on the top and side of each T‐shaped dipole antenna element, the impedance bandwidth and circular polarization performance of the antenna can be further improved. The simulation results show that the 10‐dB impedance bandwidth of the antenna is 93% (1.56‐4.27 GHz) and the 3‐dB AR bandwidth is 80.7% (1.7‐4.0 GHz). The measured results are in good agreement with the simulation results. Due to the use of orthogonally placed wideband feed network and wideband array elements, the proposed antenna array has a wider circular polarization bandwidth than the similar antenna arrays reported.

中文翻译：

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具有顺序旋转馈电的宽带圆极化天线阵列

设计了一种新颖的宽带圆极化（CP）天线阵列，该阵列由水平放置的宽带相移馈电网络和四个垂直放置的线性极化偶极子天线元件组成，并基于顺序旋转馈电技术实现了圆形极化。通过在每个T形偶极天线元件的顶部和侧面放置两个寄生带和两个接地带，可以进一步提高天线的阻抗带宽和圆极化性能。仿真结果表明，天线的10dB阻抗带宽为93％（1.56-4.27 GHz），而3dB AR带宽为80.7％（1.7-4.0 GHz）。测量结果与仿真结果吻合良好。由于使用了正交放置的宽带馈送网络和宽带阵列元件，