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High Isolation UWB-MIMO Compact Micro-strip Antenna

机译：高隔离度UWB-MIMO紧凑型微带天线

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摘要

A compact four-unit ultra-wideband multiple-input multiple-output (UWB-MIMO) antenna with very high isolation, dual polarization, notched structure, and achieving dual-state operation, along with smaller volume, is proposed in this paper. The proposed MIMO antenna element consists of two parts: the front patch composed of four symmetrical trapezoidal radiating elements and feeder, and the back composed of a rectangular annular ground. The offset of antenna operating frequency band is achieved by adjusting the rectangular patch in the middle of the back side, and by introducing an X-shaped metal narrow strip on the top side and an X-shaped slit on the bottom side to improve the isolation in the single port feeding state of antenna. Finally, the dimension of the antenna is 32 x 32mm(2). Under the frequency from 3.1 GHz to 10.6 GHz, the isolation in the condition of differential mode can below -30 dB, which is very high, and also can work in the single port inputting state, showing a dual mode operation. In addition, a trapezoidal slit is introduced to obtain a notch structure. The measured results and simulation results are consistent.
机译：本文提出了一种紧凑的四单元超宽带多输入多输出（UWB-MIMO）天线，该天线具有很高的隔离度，双极化，带凹口的结构，并实现了双态操作，并且体积更小。拟议的MIMO天线元件由两部分组成：前部由四个对称的梯形辐射元件和馈线组成，后部由矩形环形地面组成。天线工作频带的偏移是通过调整背面中间的矩形贴片，并在顶部引入X形金属窄条和在底部引入X形缝隙来提高隔离度而实现的在天线的单端口馈电状态下。最后，天线的尺寸为32 x 32mm（2）。在3.1 GHz至10.6 GHz的频率下，差分模式下的隔离度可以低于-30 dB，这是非常高的，并且还可以在单​​端口输入状态下工作，显示出双模式操作。另外，引入梯形狭缝以获得缺口结构。测量结果与仿真结果一致。

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