This paper presents design of a multi-slotted quadband 2-element MIMO antenna suitable for 4G and 5G applications. The design is realized on an 18.5 × 56 mm² (0.154 ${\lambda }_o$ × 0.467 ${\lambda }_o$, where ${\lambda }_o$ is the wavelength of the lowest resonant frequency of 2.5 GHz) FR4 epoxy substrate having a thickness of 1.6 mm and a relative permittivity of 4.4. The simulated and measured results agree well with each other. A simple de-coupler structure has been incorporated on the bottom side to reduce the mutual coupling at operating frequency bands (2.5, 3.7, 4.3, and 5.5 GHz). Furthermore, it was observed that the measured envelope correlation coefficient of the designed MIMO antenna is considerably lower than 0.05. Also, the design exhibits measured gains of 3.49, 2.97, 2.93, and 2.54 dBi at 2.5, 3.7, 4.3, and 5.5 GHz, respectively.

本文介绍了适用于 4G 和 5G 应用的多槽四频 2 单元 MIMO 天线的设计。该设计是在 18.5 × 56 mm ² (0.154${\lambda }_{○}$ × 0.467 ${\lambda }_{○}$， 在哪里 ${\lambda }_{○}$是最低谐振频率2.5GHz的波长）FR4环氧树脂基板，厚度为1.6mm，相对介电常数为4.4。模拟结果和测量结果相互吻合。底部采用了一个简单的去耦器结构，以减少工作频段（2.5、3.7、4.3 和 5.5 GHz）的互耦。此外，观察到所设计的 MIMO 天线的测量包络相关系数远低于 0.05。此外，该设计在 2.5、3.7、4.3 和 5.5 GHz 下的测量增益分别为 3.49、2.97、2.93 和 2.54 dBi。