A narrow-band circularly polarized leaky-wave antenna with open stopband suppressed

被引：6
作者：
Xu, Shen-Da [1 ]
Guan, Dong-Fang [2 ]
Liu, Li [2 ]
Zhang, Qingfeng [3 ]
Xu, Hantao [2 ]
Yong, Shao-Wei [2 ]
机构：
[1] Peoples Liberat Army Troops 94019, Hetian, Peoples R China
[2] Natl Univ Def Technol, Coll Elect Sci & Technol, Changsha 410073, Peoples R China
[3] Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China
来源：
INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING | 2021年 / 31卷 / 07期
基金：
中国国家自然科学基金;
关键词：
circularly polarized (CP); leaky‐ wave antenna (LWA); narrow‐ band; open stopband;
D O I：
10.1002/mmce.22647
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
In this paper, a narrow-band circularly polarized (CP) microstrip leaky-wave antenna (LWA) with open stopband suppressed is proposed. Coupled meandered slow-wave lines are adopted to realize narrow-band beam scanning. The asymmetric elements are employed as radiators to realize CP and zero-crossing scanning. We modulated the antenna by loading the ground inductance and asymmetric capacitors on the meandered slow-wave transmission line. The antenna consists of ten asymmetrical structural elements connected by coupling, the antenna size of L x W is 170 mm x 25 mm. In the operating band of 8.1 to 8.5 GHz, the measured scanning angel of the fabricated antenna is from -31 degrees to +6 degrees. The antenna axial ratios (ARs) are all below 3 dB at the corresponding beam directions. The gain is above 9.1 dBi and the relative bandwidth is only 4.8%. In the operating band, the radiation efficiency is above 60%. It has potential applications in radar detection and wireless communication systems for its simple and low-profile structure with CP, beam-scanning, and narrow-band performance.
引用
收藏
页数：7
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