A directional circularly polarized crossed-dipole antenna with bandwidth enhancement

被引：13
|
作者：
Guo, Zifang [1 ]
Zhao, Zhiqin [1 ]
Yang, Yaohui [1 ]
Ding, Xiaoxiang [1 ]
机构：
[1] UESTC, Sch Elect Engn, Chengdu 611731, Sichuan, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2018年 / 60卷 / 09期
基金：
中国国家自然科学基金;
关键词：
broadband; circularly polarized; crossed dipoles; parasitic loading; WIDE-BAND;
D O I：
10.1002/mop.31324
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 broadband circularly polarized antenna based on the crossed-dipole structure is designed. The antenna consists of a pair of dual-side printed crossed dipoles, a loop phase delay line, and a parasitic patch. By modifying the configuration of the dipoles and introducing a parasitic patch, a wide axial ratio (AR) bandwidth is obtained. A defected ground plane is designed, which has a significant improvement in extending the 3-dB AR bandwidth and enhances the gain. The proposed prototype is manufactured and measured for validation. Measured results show that the antenna achieves both -10dB impedance bandwidth and 3-dB AR bandwidth of 68.6% (2.3-4.7GHz). Moreover, the average gain of the antenna is about 8dBi within the operating band, with a floating less than 2dB.
引用
收藏
页码：2161 / 2167
页数：7
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