In this article, the analysis of isolation improvement in cylindrical dielectric resonator antennas (CDRAs) is performed for wideband multiple-input multiple-output (MIMO) applications. The proposed MIMO design consists of a K-shaped microstrip feed network above which the dielectric resonators are placed and an extended semi-circular microstrip at the backside of the antenna attached with the partial ground plane. The exclusive feature of the proposed MIMO antenna includes high isolation in a wide frequency range with significantly less separation between the radiators with good gain. Measured results show that this design offers a below 10 dB impedance bandwidth 138.02% (1.54–8.4 GHz) with greater than 15 dB isolation. The measurement of radiation patterns and envelope correlation coefficient (ECC) is also performed to verify the antenna suitability for MIMO)/diversity systems. Ansys HFSS 14.0 version has been used for analysis to get optimized value for the proposed antenna design.

在本文中，针对宽带多输入多输出（MIMO）应用对圆柱形介质谐振器天线（CDRA）的隔离改善进行了分析。拟议的MIMO设计包括一个K形微带馈电网络，上面放置了介质谐振器，以及一个在与部分接地层相连的天线背面的扩展半圆形微带。所提出的MIMO天线的独有功能包括在宽频率范围内实现高隔离度，且辐射器之间的间隔明显较小，并具有良好的增益。测量结果表明，该设计提供了低于10 dB的阻抗带宽138.02％（1.54–8.4 GHz），隔离度大于15 dB。还执行辐射方向图和包络相关系数（ECC）的测量，以验证天线是否适合MIMO /分集系统。Ansys HFSS 14.0版本已用于分析，以获得建议天线设计的最佳值。