This article presents fractal shape based MIMO antenna with microstrip feeding for sub 6-GHz applications. The proposed fractal based structure is a flower-shaped construct with added rectangular strips patch and circular, rectangular slots are introduced into the ground plane to reduce the isolation between the patches. The main purpose in designing 2 × 1 MIMO system antenna is to enhance the scattering signals and optimize the performance. The proposed structure uses FR-4 material with a dimension of 25 mm × 38 mm. The 2 × 1 MIMO structure resonate at 3.5 GHz for the sub 6 GHz 5 G communications with directional radiation pattern. The performance characteristics of the antenna such as surface current distributions, radiation patterns and S-parameters are investigated. In addition the performance of diversity system of MIMO structure including the total active reflection coefficient (TARC), multiplexing efficiency, envelope correlation coefficient (ECC) and diversity gain (DG) are studied. For this proposed MIMO structure all antenna parameters are found that within an acceptable range.

本文介绍了基于分形形状的MIMO天线，具有适用于6 GHz以下应用的微带馈电。所提出的基于分形的结构是一种花形构造，带有添加的矩形条状斑块，并且圆形矩形槽被引入到地平面中以减少斑块之间的隔离。设计2×1 MIMO系统天线的主要目的是增强散射信号并优化性能。拟议的结构使用尺寸为25 mm×38 mm的FR-4材料。2×1 MIMO结构在具有定向辐射方向图的6 GHz以下5 G通信中在3.5 GHz处产生谐振。研究了天线的性能特征，例如表面电流分布，辐射方向图和S参数。此外，还研究了MIMO结构的分集系统的性能，包括总有源反射系数（TARC），复用效率，包络相关系数（ECC）和分集增益（DG）。对于该提出的MIMO结构，发现所有天线参数都在可接受的范围内。