This article introduces a cylindrical dielectric resonator antenna (CDRA) fed with a rhombic ring-shaped tapered feed for Multiple-Input-Multiple-Output (MIMO) applications. The proposed hybrid MIMO CDRA resonates at four frequency bands 2.5, 5.09, 6.8, and 9.0 GHz with isolation levels of 22, 34.22, 30.55, and 18.55 dB. Isolation enhancements are achieved by introducing “L” shaped slots on the partial ground plane. Parametric analysis is performed to validate the optimized dimensions of the tapered feed without and with DRA and defected ground structure. Diversity performance is examined by using envelope correlation coefficient and diversity gain. The proposed antenna operates in the S, C, and X-bands and is suitable for RF communication mobile broadband services, Wi-Fi, radar, and satellite applications. Good agreement is observed between simulated and measured results.

中文翻译：

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带 DGS 的四频段混合 DRA 负载 MIMO 天线，用于增强隔离

本文介绍了用于多输入多输出 (MIMO) 应用的圆柱形介质谐振器天线 (CDRA)，该天线采用菱形环形锥形馈电馈电。所提出的混合 MIMO CDRA 在 2.5、5.09、6.8 和 9.0 GHz 四个频段上产生谐振，隔离级别分别为 22、34.22、30.55 和 18.55 dB。通过在部分接地平面上引入“L”形槽来实现隔离增强。执行参数分析以验证没有和有 DRA 和有缺陷的地面结构的锥形进给的优化尺寸。通过使用包络相关系数和分集增益来检查分集性能。建议的天线在小号,C， 和X-频段，适用于射频通信移动宽带服务、Wi-Fi、雷达和卫星应用。在模拟结果和测量结果之间观察到了良好的一致性。