In this communication, a compact dual-element MIMO antenna with decoupling structure has been proposed for handheld devices. The proposed decoupling structure acts as a resonator and as a decoupling structure. The proposed antenna consists of nested slots in the radiator and it supports the application such as LTE, WLAN, Wi-Fi, and WiMAX. The total size of the antenna is 30 mm × 10 mm. The impedance bandwidth of the antenna is 300/400/700 MHz, respectively. The decoupling structure consists of a feed line printed on one side of the substrate and swastika-shaped array on another side. The power fed to the feed line coupled to the swastika-shaped array for achieving the operating bands at 0.9 GHz and (8-10) GHz. Meanwhile, the decoupling array provides isolation more than 20 dB at (2.3-2.6) GHz, (3.4-3.8) GHz, and (5.15-5.85) GHz. The edge to edge spacing between the antennas is 10 mm. The percentage bandwidth of the antenna is 12.2/11.1/12.7/22.2%. The MIMO performance metrics such as envelope correlation coefficient, effective diversity gain, apparent diversity gain, and mean effective gain are evaluated. The proposed antenna is fabricated and tested. The measured results correlate with the simulated results.

中文翻译：

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用于 MIMO 应用的双功能阵列与嵌套槽辐射器的集成

在这种通信中，已经提出了一种用于手持设备的具有解耦结构的紧凑型双元件 MIMO 天线。所提出的去耦结构充当谐振器和去耦结构。建议的天线由辐射器中的嵌套槽组成，它支持 LTE、WLAN、Wi-Fi 和 WiMAX 等应用。天线的总尺寸为 30 mm × 10 mm。天线的阻抗带宽分别为300/400/700 MHz。去耦结构由印刷在基板一侧的馈线和另一侧的卐字形阵列组成。馈入馈线的功率耦合到卐字形阵列，以实现 0.9 GHz 和 (8-10) GHz 的工作频段。同时，去耦阵列在 (2.3-2.6) GHz、(3.4-3.8) GHz 和 (5.15-5.85) GHz 下提供超过 20 dB 的隔离。天线之间的边到边间距为 10 毫米。天线的带宽百分比为12.2/11.1/12.7/22.2%。评估了 MIMO 性能指标，例如包络相关系数、有效分集增益、表观分集增益和平均有效增益。所提出的天线已被制造和测试。测量结果与模拟结果相关。