Design of wideband circularly polarized metasurface antenna using characteristic mode analysis

被引：7
作者：
Ding, Zhendong [1 ]
Xu, Mengnan [1 ]
Li, Xiang [2 ]
Tao, Shifei [1 ]
Wang, Hao [1 ]
Wang, Yan [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Nanjing 210094, Peoples R China
[2] Northern Inst Elect Equipment China, Beijing, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2023年 / 65卷 / 06期
关键词：
characteristic mode analysis; circular polarization; metasurface; mode significance; MONOPOLE ANTENNA; SLOT ANTENNA;
D O I：
10.1002/mop.33623
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：
A wideband circularly polarized metasurface antenna using characteristic mode analysis is presented in this letter, which is composed of two-layer substrate, 4 x 4 circular patch metasurface, L-slot, transmission line, and air spacing. Through mode analysis, the metasurface structure can significantly enhance the bandwidth and gain of the antenna, and realize circular polarization (CP). After excitation, the air spacing and the L-slot can realize 90 degrees difference between the characteristic angles of the two modes of the metasurface, and finally radiate CP. The measurement results show that the prototype has a -10 dB impedance bandwidth from 5.6 to 8.2 GHz (37.7%), a 3-dB axial ratio bandwidth from 6.2 to 7.8 GHz (22.9%), and a peak gain of 8.7 dBi at 6.4 GHz.
引用
收藏
页码：1794 / 1799
页数：6
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