For the 5G applications of future sub-6 GHz a novel planar very low compact MIMO antenna is designed with improved isolation and impedance matching with T-shaped ground plane and mode analysis is presented here. A very low compact substrate with an area of 48 mm × 24 mm spiritual leaf shape radiating patches are situated in the same direction and maintained a separation distance of 2 mm. To improve the isolation and improved bandwidth, a remodeled structure of T-shaped grounded stub is placed among the pair of radiating antenna elements. The spiritual shaped antenna maintain a −10 dB required operating band of 2.43–3.01 GHz (580 MHz) and 3.19–3.84 GHz (650 MHz) with an isolation more than 20 dB maintained between antenna elements. The spiritual leaf shape antenna offers a radiation efficiency of 94.4 & 86.99% and its peak gain about 7.2 & 6.3 dBi. The simulated isolation is greater than 30 dB thought the dual-band with a maximum isolation of 54 dB. For this MIMO design diversity gain is around 10 dBi, channel capacity loss is less than 0.2 bits/s/Hz, group delay <1 ns and envelope correlation coefficient (ECC) which is lower than 0.0478.

中文翻译：

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用于 5G 低于 6 GHz 应用的灵叶形紧凑型 MIMO 贴片天线

对于未来 sub-6 GHz 的 5G 应用，设计了一种新型平面极低紧凑型 MIMO 天线，具有改进的隔离性和与 T 形接地平面的阻抗匹配，并在此介绍了模式分析。面积为 48 mm × 24 mm 的灵叶状辐射斑块的极低致密基板位于同一方向，并保持 2 mm 的间隔距离。为了提高隔离度和带宽，在一对辐射天线元件之间放置了一个改造后的T形接地短截线结构。灵形天线保持 -10 dB 所需的 2.43–3.01 GHz (580 MHz) 和 3.19–3.84 GHz (650 MHz) 工作频带，天线元件之间保持超过 20 dB 的隔离。灵叶形天线提供94.4 & 86.99%的辐射效率，峰值增益约7.2 & 6.3分贝。双频段的模拟隔离度大于 30dB，最大隔离度为 54dB。对于这种 MIMO 设计，分集增益约为 10 dBi，信道容量损失小于 0.2 bits/s/Hz，群延迟 <1 ns，包络相关系数 (ECC) 低于 0.0478。