A Circularly Polarized Antenna by Using Rotated-Stair Dielectric Resonator

被引：99
|
作者：
Wang, Kai Xu [1 ]
Wong, Hang [1 ]
机构：
[1] City Univ Hong Kong, Dept Elect Engn, State Key Lab Millimeter Waves, Kowloon, Hong Kong, Peoples R China
来源：
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2015年 / 14卷
关键词：
Aperture coupled; circular polarization (CP); dielectric resonator antenna; rotated-stair DRA; wide bandwidth;
D O I：
10.1109/LAWP.2014.2385475
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：
In this letter, a wideband compact circularly polarized (CP) dielectric resonator antenna (DRA) is proposed. This antenna consists of two rectangular dielectric layers that are stacked with a rotation angle relative to its adjacent bottom layer. The antenna is excited by an aperture coupled through a slot cutting on the ground plane. The rotated-stair configuration of DRA contributes dual broadside CP radiating modes and results in a noticeable enhancement in the axial ratio (AR) bandwidth. The proposed antenna achieves 31% impedance bandwidth and 18.2% AR bandwidth. The average gain within the AR bandwidth is 4.5 dBi with less than 0.5-dB variation. Moreover, the proposed dielectric resonator antenna has a low-profile structure. This work demonstrates a CP bandwidth broadening technique for the DRA. The potential applications of the antenna are 5G Wi-Fi and satellite communication systems.
引用
收藏
页码：787 / 790
页数：4
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