Characteristic Modes Analysis of a Near-Field Polarization-Conversion Metasurface for the Design of a Wideband Circularly Polarized X-Band Antenna

被引：26
作者：
Genovesi, Simone [1 ]
Dicandia, Francesco Alessio [1 ]
机构：
[1] Univ Pisa, Dipartimento Ingn Informaz, I-56122 Pisa, Italy
来源：
IEEE ACCESS | 2022年 / 10卷
关键词：
Characteristic modes analysis; circular polarization; metasurface; wideband; X-band; satellite communication; LOW-PROFILE; PATCH ANTENNA; RECONFIGURABLE ANTENNA; COMPACT; ENHANCEMENT; SUPERSTRATE; BANDWIDTH; PAYLOAD; SLOT;
D O I：
10.1109/ACCESS.2022.3200303
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A metasurface (MS) based on loop elements operating in the near field of a linearly-polarized microstrip antenna is employed to realize a circularly polarized radiated field. The properties of the loop unit cell are highlighted with the help of the Characteristic Mode Analysis that is employed for investigating the achievable linear to circular polarization conversion bandwidth and providing the guidelines for the design of the final antenna. A finite structure comprising 4 x 4 unit cells is tailored for achieving a circularly polarized far field within the whole X-band adopted for satellite communications (7.25 GHz-7.75 GHz, 7.9 GHz-8.4 GHz). A simple but effective single-port excitation scheme is adopted, and the overall performance are assessed by measurements on the fabricated prototype. The good agreement between simulated and measured results confirms the reliability of the proposed approach as well as the meaningful insight provided by Characteristic Modes Theory.
引用
收藏
页码：88932 / 88940
页数：9
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