Wideband Low-Sidelobe Circularly Polarized Array Using Sequential Subarray Rotation

被引：0
作者：
Li, Jinlun [1 ]
Gao, Sheng [1 ]
Chen, Hongtai [1 ]
Li, Shunli [1 ]
Zhao, Hongxin [1 ]
Yin, Xiaoxing [1 ]
机构：
[1] Southeast Univ, State Key Lab Millimeter Waves, Nanjing, Peoples R China
来源：
2024 IEEE INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY, IWAT | 2024年
关键词：
Circularly polarized; grating lobe suppression; low sidelobe; sequentially rotated array; subarray rotation; wideband;
D O I：
10.1109/iWAT57102.2024.10535864
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This work presents a wideband low-sidelobe 2x10 circularly polarized helix antenna array using sequential subarray rotation. To avoid grating lobes in uniformly distributed sequential rotation arrays, adjacent subarrays are rotated by 180 degrees. A wideband low-sidelobe array is designed. Each subarray consists of four sequentially rotated helix elements for high-purity circular polarization. A 3-dB hybrid coupler provides wideband 90 degrees phase difference. Taylor-distributed excited coefficient is implemented in feed network to suppress sidelobe. Simulated results show that the sidelobe level on horizontal plane is below -22 dB in 6-7.5 GHz, while the axial ratio is lower than 1.7 dB.
引用
收藏
页码：67 / 70
页数：4
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