A compact six-element MIMO antenna is presented for present and future wireless applications. The resonating elements of the proposed antenna are simple monopoles, which are excited by microstrip feed lines. In the MIMO antenna, two elements (Ant. 1 and Ant. 2) cover 727–1066 MHz and 5.28–6.2 GHz frequency bands for the IoT and WLAN/Wi-Fi applications, respectively. The other two elements (Ant. 3 and Ant. 4) cover 1.7–1.9 GHz band for NB-IoT applications, 5.5–5.8 GHz for Wi-Fi applications and 7.2–8.9 GHz for X-band applications. Other two elements (Ant. 5 and Ant. 6) cover 3.1–3.58 GHz band for sub-6 GHz applications. Decoupling network and stubs are used for isolation and impedance matching in the proposed MIMO antenna. The antenna shows a decent gain in all the resonating frequency bands.

提出了一种紧凑的六元素MIMO天线，用于当前和未来的无线应用。所提出的天线的谐振元件是简单的单极子，由微带馈线激励。在MIMO天线中，两个元素（Ant。1和Ant。2）分别覆盖了IoT和WLAN / Wi-Fi应用的727-1066 MHz和5.28-6.2 GHz频带。其他两个元素（第3蚂蚁和第4蚂蚁）在NB-IoT应用中覆盖1.7-1.9 GHz频段，在Wi-Fi应用中覆盖5.5-5.8 GHz，在X频段应用覆盖7.2-8.9 GHz。其他两个元素（Ant。5和Ant。6）覆盖了低于6 GHz的应用的3.1–3.58 GHz频带。去耦网络和短截线用于建议的MIMO天线中的隔离和阻抗匹配。天线在所有谐振频段上都显示出不错的增益。