Gain-Improved Broadband Circularly Polarized Antenna Array With Parasitic Patches

被引:89
作者
Ding, Kang [1 ]
Gao, Cheng [1 ]
Yu, Tongbin [2 ]
Qu, Dexin [2 ]
Zhang, Bing [3 ]
机构
[1] PLA Univ Sci & Technol, Natl Key Lab Electromagnet Environm Effects & Ele, Nanjing 210007, Jiangsu, Peoples R China
[2] PLA Univ Sci & Technol, Inst Commun Engn, Nanjing 210007, Jiangsu, Peoples R China
[3] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore
来源
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2017年 / 16卷
基金
中国国家自然科学基金;
关键词
Antenna array; broadband; circularly polarized; SEQUENTIAL-ROTATION ARRAYS;
D O I
10.1109/LAWP.2016.2646400
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 (CP) antenna array with improved gain is proposed. The antenna consists of a CP loop that provides sequential phase, a 2 x 2 patch array, and four parasitic rectangular elements. The square patches are capacitively coupled with four strips, which are connected to the loop feeding network. Moreover, four parasitic rectangular patches are introduced to enhance the gain in the lower band. The measured 10-dB impedance bandwidth is 15.9% (5.01-5.87 GHz), and the 3-dB axial-ratio bandwidth of 640 MHz (5.08-5.72 GHz) is also obtained. Besides, the proposed antenna array has a flat gain over the operating frequency and themaximum gain of 12.5 dBi is achieved at 5.3 GHz.
引用
收藏
页码:1468 / 1471
页数:4
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