A Broadband Circularly Polarized Patch Antenna With Improved Axial Ratio

被引：24
|
作者：
Zhuang, Jianxing [1 ]
Zhang, Yan [1 ]
Hong, Wei [1 ]
Hao, Zhangcheng [1 ]
机构：
[1] Southeast Univ, Sch Informat Sci & Engn, State Key Lab Millimeter Wave, Nanjing 210096, Jiangsu, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2015年 / 14卷
基金：
高等学校博士学科点专项科研基金;
关键词：
Axial ratio (AR); broadband; circular polarization; metal sheet; patch antenna; PROBE;
D O I：
10.1109/LAWP.2015.2396672
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：
In this letter, a novel method to improve the axial ratio (AR) of circularly polarized patch antenna is presented. The feed network consists of a broadband balun and two L-shaped probes. By introducing a metal sheet between the probes, the AR could be improved at the upper sideband significantly, where there exhibits a downward tendency. Therefore, a wider bandwidth of the AR can be achieved. The proposed antenna shows a measured impedance (vertical bar S-11 vertical bar) < -10 dB) and 3-dB AR bandwidths of 62.3% and 61.7%, respectively. The measured bandwidth for gain > 3dBi is 40.3%.
引用
收藏
页码：1180 / 1183
页数：4
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