A Broadband Slot Antenna With Unidirectional Circularly Polarized Radiation Patterns

被引：24
|
作者：
Xu, Rui [1 ]
Li, Jian-Ying [1 ]
Wei, Kun [1 ]
Yang, Guang-Wei [1 ]
机构：
[1] Northwestern Polytech Univ, Xian 710072, Peoples R China
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：
Broadband; circular polarization (CP); slot antenna; unidirectional; PATCH ANTENNA; BANDWIDTH;
D O I：
10.1109/LAWP.2016.2574808
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 novel circular slot antenna is proposed in this letter to generate a broadband circular polarization (CP) wave. This antenna consists of a Gamma-shaped radiator and a circular ground with a cut of three ellipses. By adjusting the size and position of these ellipses, a CP wave can be realized. A chip resistor, which is used to receive the currents and decrease reflection, can significantly enhance the CP bandwidth. The study of the effect to antenna performance of different geometric parameters has been conducted. The results show that good performance of impedance bandwidth (S-11 < -10 dB) is approximately 106.1% (1.01 similar to 3.29 GHz), and 3-dB axial-ratio bandwidth is approximately 89.7% (1.26 similar to 3.31 GHz). Moreover, the antenna exhibits a stable average gain of about 6.0 dBic in the operating band, and the circularly polarized peak gain is about 7.6 dBic.
引用
收藏
页码：317 / 320
页数：4
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