Gain and Bandwidth Improvement of a Cylindrical Dielectric Resonator Antenna (CDRA) by Using of Metamaterial Structures

Q4 Engineering

Majlesi Journal of Electrical Engineering Pub Date : 2021-06-01 DOI:10.52547/mjee.15.2.1

S. Miri, F. Mohajeri

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引用次数: 1

Abstract

Using metamaterials on the top of the antenna’s accordance to magneto-dielectric superstrate and near zero refraction index theories causesimprovement of radiation efficiency and gain of antennas. In thisarticle, two novel metamaterial unit cells are proposed for gain and bandwidth improvement of Cylindrical Dielectric Resonator Antenna (CDRA). The first metamaterial unit cell is a negative magnetic structure including two rings implemented on both sides of RT/doroid 5880 substrate with dielectric constant of 2.2. Besides, the second metamaterial unit cell is a Double Negative Structure (DNG) realized consisting of two rings printed in one side and a thin wire in other side of RT/doroid 5880 substrate. Two77 arrays of proposed unit cells are considered and used as superstrate layers on the top of a CDRA. Also, the CDRA is made of RT/doroid 6010 material with dielectric constant of 10.2 working at the frequency of 10 GHz. Using proposed metamaterial structures as superstrate layers on the top of the CDRA causesgain and bandwidth improvement up to 3.3 dB and 4.8%,respectively. CDRA in the presence of proposed metamaterial superstrates are analyzed using a 3D full-wave simulator.

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利用超材料结构改善圆柱形介质谐振天线（CDRA）的增益和带宽

根据磁介电层和近零折射率理论，在天线顶部使用超材料，可以提高天线的辐射效率和增益。为了提高圆柱介质谐振器天线的增益和带宽，提出了两种新型的超材料单元电池。第一种超材料单元电池是包括两个环的负磁结构，实现在RT/doroid 5880衬底两侧，介电常数为2.2。此外，第二种超材料单元电池是由RT/doroid 5880衬底的一侧印刷两个环，另一侧印刷细线组成的双负结构(DNG)。所提出的两个77个单元阵列被考虑并用作CDRA顶部的上覆层。CDRA采用RT/doroid 6010材料，介电常数为10.2，工作频率为10ghz。使用所提出的超材料结构作为CDRA顶部的叠加层，增益和带宽分别提高了3.3 dB和4.8%。利用三维全波模拟器对超材料表面存在下的CDRA进行了分析。

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来源期刊

Majlesi Journal of Electrical Engineering Engineering-Electrical and Electronic Engineering

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： The scope of Majlesi Journal of Electrcial Engineering (MJEE) is ranging from mathematical foundation to practical engineering design in all areas of electrical engineering. The editorial board is international and original unpublished papers are welcome from throughout the world. The journal is devoted primarily to research papers, but very high quality survey and tutorial papers are also published. There is no publication charge for the authors.