The self-curing decoupling technique is substantially extended to apply to multi-input multi-output (MIMO) antenna arrays in mobile terminals. Using this proposed technique, the mutual coupling between antennas can be reduced by inlaying lumped element capacitors on the ground plane. The decoupling method does not require any physical connection or obstruction between coupled antennas. The significance of the proposed decoupling technique is fourfold: 1) it works for inverted-F antennas (IFAs), monopole antennas, and loop antennas, the most three commonly used antenna forms for mobile terminals; 2) the inherent improvement on matching conditions after decoupling; 3) the flexibility in implementation owing to its detachment from the antenna body; and 4) the applicability to an array with more than two elements. Four demonstrating examples, including two IFAs, two monopole antennas, two loop antennas, and a MIMO array with four elements of different antenna types are studied by EM modeling, passive tests, and MIMO over-the-air (OTA) measurements. The experimental results show that significant improvements in port isolation (from 9 to 30 dB), total efficiency (from 53% to 69%), and above all, the system data throughput can be achieved. The working mechanism of the method is revealed and justified through the partial element equivalent circuit (PEEC) model in the fifth example.

中文翻译：

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移动终端MIMO天线阵列自固化解耦技术

自固化解耦技术在很大程度上扩展到应用于移动终端中的多输入多输出 (MIMO) 天线阵列。使用这种建议的技术，可以通过在接地平面上镶嵌集总元件电容器来减少天线之间的相互耦合。去耦方法不需要耦合天线之间的任何物理连接或障碍。所提出的去耦技术的意义有四方面：1) 它适用于倒 F 天线 (IFA)、单极天线和环形天线，这是移动终端最常用的三种天线形式；2）解耦后匹配条件的内在改进；3) 与天线本体分离，实施灵活；和 4) 适用于具有两个以上元素的数组。四个示范例子，通过电磁建模、无源测试和 MIMO 空中 (OTA) 测量，研究了包括两个 IFA、两个单极天线、两个环形天线和具有四个不同天线类型元件的 MIMO 阵列。实验结果表明，在端口隔离（从 9 到 30 dB）、总效率（从 53% 到 69%）以及最重要的是，可以实现系统数据吞吐量方面的显着改善。通过实例五中的部分元件等效电路（PEEC）模型揭示并论证了该方法的工作机理。总效率（从 53% 到 69%），最重要的是，可以实现系统数据吞吐量。通过实例五中的部分元件等效电路（PEEC）模型揭示并论证了该方法的工作机理。总效率（从 53% 到 69%），最重要的是，可以实现系统数据吞吐量。通过实例五中的部分元件等效电路（PEEC）模型揭示并论证了该方法的工作机理。