Bandwidth and Gain Improvement of an L-Shaped Slot Antenna With Metamaterial Loading

被引：54
作者：
Chen, Qiang [1 ]
Zhang, Hou [1 ]
Shao, Yi-Jun [1 ]
Zhong, Tao [1 ]
机构：
[1] Air Force Engn Univ, Air Def & Antimissile Inst, Xian 710051, Shaanxi, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2018年 / 17卷 / 08期
关键词：
Circularly polarized; high gain; metamaterial; widehand;
D O I：
10.1109/LAWP.2018.2848639
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 metamaterial-based wideband and high-gain circularly polarized (CP) mushroom antenna is proposed and analyzed in this letter. The proposed antenna consists of a 4 x 4 mushroom-cells array and an L-shaped slot coupling-fed layer. The metamaterial-based mushroom cells are adopted to adjust the axial ratio (AR) to realize wideband CP and high gain. With the optimization, the proposed dielectric-filled mushroom antenna is with a low profile of 0.08 lambda(0) (lambda(0) is the operating wavelength in free space) while covering an area of 60mm x 60mm only. The measured impedance bandwidth of the proposed antenna is 48.2% (5.2-8.5 GHz), and the measured 3 dB AR bandwidths are 35.5% (5.8-8.3 GHz). Moreover, the antenna performed a stable high gain which is better than 10.5 dBic from 6 to 7.5 GHz across the CP region.
引用
收藏
页码：1411 / 1415
页数：5
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