An omni-directional circularly polarized antenna with a low profile and wide axial-ratio beamwidth

被引：0
|
作者：
Liu, Jiang [1 ]
Chen, Xinwei [1 ]
Han, Liping [1 ]
Ma, Runbo [1 ]
Yang, Rongcao [1 ]
Zhang, Wenmei [1 ]
机构：
[1] Shanxi Univ, Coll Phys & Elect Engn, Taiyuan, Shanxi, Peoples R China
来源：
ELECTROMAGNETICS | 2018年 / 38卷 / 03期
基金：
中国国家自然科学基金; 山西省青年科学基金;
关键词：
Circularly polarized antenna; low profile; omni-directional radiation; vortex radiator; wide axial-ratio beamwidth; PATCH ANTENNA; BAND;
D O I：
10.1080/02726343.2018.1446492
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 novel low profile omni-directional circularly polarized (CP) antenna with wide axial-ratio (AR) beamwidth in the elevation plane is proposed. It is composed of a compound vortex radiator, a ground plane, and two groups of vias. By adjusting the structure of the compound vortex stub, |E|=|E-phi| is realized in a wider range of . Also, the 90 degrees phase difference between E and E-phi is obtained by regulating the size of a sector patch at the end of the vortex stub. The measured results show that the proposed antenna has an impedance bandwidth of 3.2% (3.03-3.13 GHz) and a 3 dB AR bandwidth of 21.6% (2.5-3.17 GHz). Also, the 3 dB AR beamwidths at 3.10 GHz are 270 degrees and 274 degrees in the phi=0 degrees and phi=90 degrees planes, respectively. A good agreement between the simulated and measured results is obtained.
引用
收藏
页码：155 / 165
页数：11
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