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首页> 外文期刊>International journal of antennas and propagation >A Compact Dual-Band CPW-Fed MIMO Antenna for Indoor Applications
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A Compact Dual-Band CPW-Fed MIMO Antenna for Indoor Applications

机译：适用于室内应用的紧凑型双频CPW馈送MIMO天线

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摘要

A compact dual-band multiple-input-multiple-output (MIMO) antenna for LTE700, GSM1900, and UMTS applications with high isolation is presented. To enhance impedance matching and multiband operation, two inverted L-shaped monopoles are printed in the circular slot of the ground plane. The single element design is mirrored along the diameter of the circular slot of the ground plane. A strip is employed between the two radiators in order to mitigate the mutual coupling effect and enhance the impedance matching at operating bandwidths. Moreover, two slits are inserted in the ground plane in order to disturb the current distribution between radiating elements, and hence, the isolation between elements is improved. The measured 10dB return loss bandwidth is 100MHz (698-798MHz) and 359MHz (1765-2124MHz) over the LTE700, GSM1900, and UMTS bands. The measured isolation between the two ports is less than -13dB over the LTE700 bands while it is recorded to be less than -17dB over the GSM1900 and UMTS bands. In addition, parametric studies of the proposed MIMO antenna are performed, and the surface current analysis is discussed to show the effect of the isolation structure. The radiation patterns are measured, and envelope correlation coefficient is calculated. The simulated results are in good agreement with measurements.
机译：提出了一种用于LTE700，GSM1900和UMTS应用且具有高隔离度的紧凑型双频多输入多输出（MIMO）天线。为了增强阻抗匹配和多频带工作，在接地平面的圆形槽中印刷了两个倒置的L形单极子。单个元件设计沿接地平面的圆形槽的直径镜像。在两个辐射器之间采用隔离带，以减轻相互耦合的影响并增强工作带宽下的阻抗匹配。此外，在接地平面中插入两个缝隙以扰乱辐射元件之间的电流分布，因此，改善了元件之间的隔离。在LTE700，GSM1900和UMTS频段上，测得的10dB回波损耗带宽为100MHz（698-798MHz）和359MHz（1765-2124MHz）。在LTE700频段上，两个端口之间测得的隔离度小于-13dB，而​​在GSM1900和UMTS频段上，测得的隔离度小于-17dB。另外，对所提出的MIMO天线进行了参数研究，并讨论了表面电流分析以显示隔离结构的效果。测量辐射图，并计算包络相关系数。仿真结果与测量结果吻合良好。

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