In this article, a compact dual‐element quasi‐self‐complementary (QSC) multiple‐input multiple‐output (MIMO) antenna for ultra‐wideband (UWB) communication is presented. The overall area of the antenna is 32 × 39 mm² (0.26 λ_l × 0.31 λ_l, where, λ_l is at lowest cutoff frequency) which is designed on low cost FR‐4 substrate. It has two half‐cut flower shaped (HCFS) radiators on its top which is formed by merging four ellipses of same eccentricity and then splitted in two halves at the center. On the other side, quasi‐self‐complementary phenomenon is introduced via etching slots which are complement to the radiator's shape. Also, a rectangular slit on the ground plane just below the feed line improves impedance matching. The proposed antenna operates in the range of frequencies 2.43GHz to 11.2GHz with high inter‐port isolation of greater than ‐19 dB over entire frequency of interest. Moreover, the stability of the design is validated in terms of diversity parameters [envelop correlation coefficients (ECC), channel capacity loss (CCL), mean effective gain (MEG), and Effective diversity gain (EDG)] and radiation parameters which makes it suitable for UWB‐MIMO wireless application.

中文翻译：

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紧凑型双元件准自互补超宽带多输入多输出天线的设计和实验验证

本文介绍了一种用于超宽带（UWB）通信的紧凑型双元件准自互补（QSC）多输入多输出（MIMO）天线。天线的总面积为32×39毫米²（0.26λ_升 ×0.31λ_升，其中，λ_升最低截止频率）是在低成本FR-4基板上设计的。它的顶部有两个半切花形（HCFS）辐射器，该辐射器是通过合并四个具有相同偏心率的椭圆，然后在中心将其分成两半而形成的。另一方面，通过与散热器形状互补的蚀刻槽引入了准自互补现象。此外，在接地平面上的馈线正下方的矩形缝隙可改善阻抗匹配。拟议中的天线工作在2.43GHz至11.2GHz的频率范围内，在整个感兴趣的频率上，端口间的隔离度均高于-19 dB。此外，设计的稳定性通过分集参数[包络相关系数（ECC），信道容量损耗（CCL），平均有效增益（MEG），