应用于Wi-Fi7的双频柔性MIMO天线设计

Design of a Dual-Band Flexible MIMO Antenna for Wi-Fi 7 Applications

摘要:

针对现代无线通信系统对高数据传输速率、低延迟等需求的增长，设计了一款应用于 Wi-Fi 7 的共面波导馈电（CPW）双频柔性 MIMO 天线。单元天线通过在单极子天线的地板上引入“L”形长枝节的方式来实现双频特性，并印刷在 LCP 柔性介质基板上。通过在两单元天线间添加两个对称的枝节，从而实现 MIMO 天线的高隔离度。天线整体尺寸为 50 mm×32 mm×0. 1 mm，实测工作频段为 2. 38~2. 6 GHz 和 4. 68~9. 83 GHz。工作频段内天线的隔离度均大于 20 dB，包络相关系数（ECC）小于 0. 002，分集增益（DG）大于 9. 999 dB。在 2. 45 GHz 和 6. 8 GHz 的比吸收率（SAR）值分别为 1. 01 W/kg 和 0. 87 W/kg，均小于国际标准。研究结果表明，该天线在未来的 Wi-Fi 7 领域具有良好的应用前景。

Abstract:

In response to the increasing demands of modern wireless communication systems for high data transfer rates and low latency， this paper presents the design of a dual-band flexible MIMO antenna with coplanar waveguide （CPW） feeding for Wi-Fi 7 applications. The unit antenna achieves dual-band operation by introducing “L”-shaped long branches on the ground plane of a monopole antenna and is printed on an LCP flexible dielectric substrate. By adding two symmetric branches between the two unit antennas， high isolation for the MIMO antenna is achieved. The overall size of the antenna is 50 mm × 32 mm × 0. 1 mm， with measured operating frequency bands of 2. 38 ? 2. 6 GHz and 4. 68?9. 83 GHz. The isolation between antennas is greater than 20 dB across the operating frequency bands， with the envelope correlation coefficient （ECC） less than 0. 002 and the diversity gain （DG） greater than 9. 999 dB. The specific absorption rate （SAR） values at 2. 45 GHz and 6. 8 GHz are 1. 01 W/kg and 0. 87 W/kg， respectively， both below international standards. The results indicate that this antenna shows strong potential for future Wi-Fi 7 applications.