Abstract
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.
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