ABSTRACT A low-profile multi-input-multi-output (MIMO)/diversity antenna suitable for wireless local area network (WLAN) applications is presented. In the proposed antenna, two identical elements (each of size 20 × 47 mm2) are designed to operate at 2.4 GHz and other two identical elements (each of size 20.5 × 20 mm2) at 5.8 GHz. All elements of the proposed diversity antenna are printed on 1.6 mm thick FR-4 substrate in a coplanar configuration. By optimizing the distance between the antenna elements (in horizontal and vertical directions), optimal isolation and diversity performance are achieved. Compared to a single feed dual-band antenna, the MIMO/diversity antenna has the ability to transmit or receive the 2.4 and 5.8 GHz signals simultaneously, without any external switching circuit between the module and the proposed antenna.

中文翻译：

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用于 WLAN 应用的薄型 2.4/5.8 GHz MIMO/分集天线

摘要介绍了一种适用于无线局域网 (WLAN) 应用的薄型多输入多输出 (MIMO)/分集天线。在提议的天线中，两个相同的元件（每个尺寸为 20 × 47 mm2）设计为在 2.4 GHz 下工作，另外两个相同的元件（每个尺寸为 20.5 × 20 mm2）设计为在 5.8 GHz 下工作。所提议的分集天线的所有元件均以共面配置印刷在 1.6 毫米厚的 FR-4 基板上。通过优化天线单元之间的距离（水平和垂直方向），实现了最佳的隔离和分集性能。与单馈双频天线相比，MIMO/分集天线能够同时发送或接收 2.4 GHz 和 5.8 GHz 信号，而在模块和建议天线之间无需任何外部开关电路。