A Wideband Circularly Polarized Dielectric Resonator Antenna Array

Wen-Wen Liu,Zhi Wang,Zhen-Hua Cao

doi:10.1109/access.2020.3011983

Wen-Wen Liu, Zhi Wang + Show 1 more

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https://doi.org/10.1109/access.2020.3011983

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Abstract

In this article, a $2\times 4$ sequentially rotated wideband circularly polarized (CP) dielectric resonator antenna (DRA) subarray with the high gain is proposed in this article. The presented antenna is constituted by four dual-cylindrical ceramic blocks, four Z-shaped slot and a sequentially rotated feeding network, which can provide equal amplitude and orthogonal phase signals. The dual-cylindrical ceramic blocks are used as the radiation element, which is excited by four Z-shaped slots etched on the ground plane based on capacitive coupling way. By combining the dual-cylindrical ceramic blocks with the sequentially rotated feeding network, the presented antenna has a wide 3-dB axial ratio bandwidth (ARBW) of 42.9% (2.4 GHz, 4.40–6.80 GHz), a wide 10-dB impedance bandwidth (IBW) of 52% (2.84 GHz, 4.04–6.88 GHz) and peak gain of 12.5 dBic.

Highlights

Considering the outstanding merits of low loss, high radiation efficiency, broad bandwidth, and ease of excitation, dielectric resonator antennas (DRAs) [1], [2] have been investigated extensively in the past few decades
circularly polarized (CP) DRA could be achieved by a single-feed way, which includes microstrip line feed [3], [4], coaxial probe feed [11], and slot coupling feed [5]–[10], such as cross-slot [5], asymmetrical U-slot [6] and archimedean spiral slot [7] et
It is of great interest to design virous of single-feed wideband CP DRAs due to their compact structure and simpler feeding network

Summary

Introduction

Considering the outstanding merits of low loss, high radiation efficiency, broad bandwidth, and ease of excitation, dielectric resonator antennas (DRAs) [1], [2] have been investigated extensively in the past few decades. In [20], a 3-dB power divider is used to excite four cylindrical ceramic blocks by aperture coupled way, the peak of 10 dBic and ARBW of 23.5% can be obtained.

Results

Conclusion