A low-profile, wideband dual-polarized 1 × 2 multiple-input-multiple-output (MIMO) antenna with frequency selective surface (FSS) decoupling technique is presented. Low profile is realized with two different artificial magnetic conductor (AMC) cells out of which one operates at 3.5 GHz and other with dual band at 3.1 and 4.5 GHz. The proposed antenna height is maintained at 0.125λ0 which is significantly reduced when compared with the conventional perfect electric conductor (PEC) ground plane. Wideband dual polarization is enabled by two pairs of bow-tie antenna elements surrounded by a square ring placed in the orthogonal orientation. To mitigate the near-field coupling in 1 × 2 MIMO an FSS wall is constructed with wide band stop characteristics from 2.85 to 4.75 GHz. Measured results show by inserting FSS wall vertically, coupling reduction is improved by 27 dB over the existing coupling and the antenna exhibits a bandwidth of 57.14% (2.95–4.95 GHz) for VSWR<2 with port isolation of more than 25 dB for entire band of operation.

提出了一种采用频率选择表面 (FSS) 去耦技术的薄型、宽带双极化 1 × 2 多输入多输出 (MIMO) 天线。采用两种不同的人工磁导体 (AMC) 单元实现低剖面，其中一个在 3.5 GHz 下工作，另一个在 3.1 和 4.5 GHz 下具有双频带。建议的天线高度保持在 0.125λ 0与传统的完美电导体 (PEC) 接地层相比，它显着降低。宽带双极化由两对蝴蝶结天线元件实现，该天线元件被放置在正交方向的方形环包围。为了减轻 1 × 2 MIMO 中的近场耦合，我们构建了具有 2.85 至 4.75 GHz 的宽带阻特性的 FSS 墙。测量结果表明，通过垂直插入 FSS 墙，耦合减少比现有耦合提高了 27 dB，并且对于 VSWR<2，天线的带宽为 57.14%（2.95-4.95 GHz），整个频段的端口隔离度超过 25 dB的操作。