Design of a compact dual-polarised slot antenna with enhanced gain

被引：5
作者：
Liu, Hu [1 ]
Liu, Ying [1 ]
Gong, Shuxi [1 ]
机构：
[1] Xidian Univ, Collaborat Innovat Ctr Informat Sensing & Underst, Natl Lab Sci & Technol Antennas & Microwaves, Xian 710071, Shanxi, Peoples R China
来源：
IET MICROWAVES ANTENNAS & PROPAGATION | 2017年 / 11卷 / 06期
基金：
中国国家自然科学基金;
关键词：
slot antennas; microstrip antennas; microstrip lines; antenna feeds; impedance matching; directive antennas; WiMax; antenna radiation patterns; compact dual-polarised slot antenna design; cross-shaped slot antenna fed; orthogonal microstrip feed lines; dual polarisations; symmetrical feeding structure; one-to-two divider; fork-like microstrip; parasitic cross-shaped slot; impedance matching improvement; antenna directivity; WiMAX band; cross-polarisation levels; E-planes; H-planes; antenna gain; port isolation; frequency; 3; 27 GHz to 3; 68; GHz; MICROSTRIP PATCH ANTENNA;
D O I：
10.1049/iet-map.2016.0843
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 compact dual-polarised slot antenna with improved gain is presented in this study. A cross-shaped slot antenna fed by two orthogonal microstrip feed lines is proposed to achieve dual polarisations. A symmetrical feeding structure is employed to realise high isolation between the two ports by utilising a one-to-two divider. The working principles of the slot antenna fed by a fork-like microstrip are investigated in detail for the first time. In addition, a parasitic cross-shaped slot is added to improve the impedance matching and directivity of the proposed antenna. The measured results show that the proposed antenna can cover the whole WiMAX band ranging from 3.27 to 3.68GHz. The cross-polarisation levels are less than -30dB in the boresight direction and lower than -25dB within 3-dB beamwidth in both E- and H-planes. The gain of the antenna is 9.15dBi +/- 0.25dB and the port isolation is greater than 27dB across the operating band.
引用
收藏
页码：892 / 897
页数：6
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