Design and Analysis of Dual Band MIMO Antenna for WLAN and ISM Band Applications

Gayathri Ilangovan, K. Vasudevan, G. Maheswari
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Abstract

In this paper, a 2X2 MIMO array of crossed elliptical-shaped monopole antenna for dual-band application is presented. The proposed single antenna layout consists of two elliptical radiators with 45° inclination on the top layer and a partial stepped-ground plane in the bottom layer. The two layers are separated by rogers substrate with a dielectric constant of 4.5 and a thickness of 1.6 mm. The proposed single antenna produces resonance at 2.46 GHz and 5.17 GHz, with a return loss of 27.64 dB & 33.10 dB and gain of 2.69 dBi & 2.53 dBi respectively. Then the proposed layout is modified to a $2\mathrm{x}2$ MIMO array with elements arranged perpendicular to each other to decrease mutual coupling among multiple radiators. Additionally, a decoupling structure is utilized in the ground plane to enhance the isolation. A substantial increase in the return loss and low ECC values are observed. Increased gains of 5.23 dBi & 5.32 dBi are observed. The proposed monopole antenna offers dual-band operation with improved gain, making it a more suitable choice for wireless communication systems.
用于WLAN和ISM频段应用的双频MIMO天线设计与分析
本文提出了一种适用于双频应用的2X2交叉椭圆型单极天线MIMO阵列。所提出的单天线布局由两个顶部倾角为45°的椭圆辐射器和底部的部分阶梯地平面组成。两层由介电常数为4.5、厚度为1.6 mm的罗杰斯衬底隔开。单天线在2.46 GHz和5.17 GHz产生共振,回波损耗分别为27.64 dB和33.10 dB,增益分别为2.69 dBi和2.53 dBi。然后将所提出的布局修改为$2\ mathm {x}2$ MIMO阵列,单元彼此垂直排列以减少多个散热器之间的相互耦合。此外,在地平面上采用了去耦结构来增强隔离。观察到回波损耗的大幅增加和低ECC值。观察到5.23 dBi和5.32 dBi增益的增加。所提出的单极天线提供双频工作和改进的增益,使其更适合无线通信系统的选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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