A Low-Profile Circularly Polarized Metasurface Antenna With Wide Axial-Ratio Beamwidth

被引：90

作者：

Liu, Sihao ^{[1
]}

Yang, Deqiang ^{[2
]}

Pan, Tin ^{[2
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 611731, Sichuan, Peoples R China

[2] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 611731, Sichuan, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Circularly polarized (CP) antenna; low profile; metasurface; wide axial-ratio beamwidth (ARBW);

D O I：

10.1109/LAWP.2019.2919533

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 letter proposes a low-profile circularly polarized metasurface antenna with a wide axial-ratio beamwidth (ARBW). The proposed antenna consists of an array of square metallic metasurface cells that are excited by amicrostrip line through four cross slots. The feeding structure can be seen as a symmetrical multiple-feed structure. Thus, E-phi and E-theta can be nearly equal in amplitude with a phase difference of 90 degrees over a wide angle range. A wide ARBW is obtained. With a size of 0.93 lambda(L) x 0.93 lambda(L) x 0.024 lambda(L) (lambda(L) is the wavelength in free space at the lowest operating frequency), the proposed antenna achieves an impedance bandwidth of 17% and an AR bandwidth of 14.5%. Moreover, the ARBW is more than 205 degrees.

引用

页码：1438 / 1442

页数：5

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