Broadband microstrip-CPW fed circularly polarised slot antenna with inverted configuration for L-band applications

被引：8
|
作者：
Liu, Hu [1 ]
Liu, Ying [1 ]
Gong, Shuxi [1 ]
机构：
[1] Xidian Univ, Natl Lab Sci & Technol Antennas & Microwaves, Xian 710071, Shaanxi, 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：
broadband antennas; microstrip antennas; coplanar waveguides; slot antennas; antenna feeds; impedance matching; reflector antennas; electromagnetic wave polarisation; impedance bandwidth; antenna gains; antenna structure; phase quadrature; CPW feed lines; phase difference comparator; Wilkinson PD; wideband feeding network power divider; rectangular slot antenna; microstrip-coplanar waveguide; L-band application; inverted configuration; broadband microstrip-CPW fed circularly polarised slot antenna; WIDE-BAND; STRIPS; DIPOLE;
D O I：
10.1049/iet-map.2016.0880
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 polarised antenna with a compact structure is proposed based on a microstrip-coplanar waveguide (CPW) fed rectangular slot antenna. The wideband feeding network power divider (PD) consists of a Wilkinson PD and a 90 degrees phase difference comparator. The even modes of four CPW feed lines are generated to provide equal amplitudes but in phase quadrature. Circular polarisations can be excited over a very broad frequency band. A reflector is added to the antenna structure to improve the antenna gains. The inverted configuration, which places the reflector in the slot side, is ultilised to enhance the impedance matching. The measured impedance bandwidth for |S-11|<-10dB is 74.4%. A broad 3-dB axial ratio bandwidth of 70.8% is also obtained. The measured 3-dB gain bandwidth is 53.65% with the peak gain of 7.4dBic.
引用
收藏
页码：880 / 885
页数：6
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