In this study, a reconfigurable, two-element, multiple-input multiple-output (MIMO) printed inverted-F antenna (PIFA) is presented with an enhanced isolation ability. The MIMO antenna system is designed using three different reconfiguration techniques that are based on positive-intrinsic-negative diodes, radio frequency micro-electromechanical switches and varactors. Their impact on the performance of the PIFA and the MIMO system is evaluated in terms of radiation characteristics, gain, power dissipated, radiation efficiency, linearity, biasing requirements and MIMO performance. Isolation between the two MIMO antenna elements is enhanced by integrating a reconfigurable band-reject filter within the ground plane between the radiating elements. The band-reject filter is reconfigured simultaneously with the radiating elements, hence resulting in less coupling and better isolation. The MIMO system along its various components is fabricated for the three different reconfiguration techniques and the comparison with predicted data shows great agreement.

中文翻译：

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具有多种重新配置技术的隔离增强型MIMO PIFA系统

在这项研究中，提出了一种具有增强的隔离能力的可重构，两元素，多输入多输出（MIMO）印刷倒F天线（PIFA）。MIMO天线系统是使用三种不同的重新配置技术设计的，这些技术基于正本征负二极管，射频微机电开关和变容二极管。根据辐射特性，增益，功耗，辐射效率，线性，偏置要求和MIMO性能，评估它们对PIFA和MIMO系统性能的影响。通过将可重新配置的带阻滤波器集成在辐射元件之间的接地平面内，可以增强两个MIMO天线元件之间的隔离度。带阻滤波器与辐射元件同时重新配置，因此，减少了耦合，改善了隔离度。MIMO系统及其各种组件是为三种不同的重新配置技术制造的，与预测数据的比较显示出很好的一致性。