Dual-band polarisation reconfigurable grounded fractal slot antenna

被引:10
作者
Saraswat, Kapil [1 ,2 ]
Harish, Ayyangar R. [1 ]
机构
[1] Indian Inst Technol Kanpur, Elect Engn, Kanpur, Uttar Pradesh, India
[2] Cent Univ Rajasthan, Dept Elect & Commun Engn, Ajmer, Rajasthan, India
关键词
antenna feeds; fractal antennas; microstrip lines; microwave antennas; multifrequency antennas; microstrip antennas; fractals; p-i-n diodes; polarisation; UHF antennas; antenna radiation patterns; broadband antennas; electromagnetic wave polarisation; slot antennas; grounded fractal structure; polarisation reconfigurability; right-hand circular polarisation; left-hand circular polarisation; polarisation switching; band polarisation reconfigurable grounded fractal slot antenna; polarisation reconfigurable fractal slot antenna; dual-band performance; ground plane; noise figure 10; 0; dB; noise figure 3;
D O I
10.1049/iet-map.2020.0542
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 polarisation reconfigurable fractal slot antenna with dual-band performance is proposed in this study. The antenna consists of a Minkowski Island fractal inspired slot in the ground plane, which is excited by a microstrip line. The input match of the antenna is improved by placing two protruding horizontal stubs inside the two corners of the fractal slot. Four p-i-n diodes are placed within the grounded fractal structure to realise polarisation reconfigurability. Based on the switching states of the p-i-n didoes, the proposed antenna can produce right-hand circular polarisation or left-hand circular polarisation. A novel biasing network is used, which uses only two wires for polarisation switching. A prototype of the proposed antenna is fabricated and tested. When the antenna is configured to radiate circular polarisation, the measured reflection coefficient bandwidths (corresponding to vertical bar S-11 vertical bar = - 10 dB) for the two bands are 15.44 and 13.16% and the measured axial ratio bandwidths (corresponding to AR <= 3 dB) are 17.61 and 8.69%, respectively.
引用
收藏
页码:1786 / 1790
页数:5
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