Abstract
A six-port MIMO antenna system for forthcoming mobile applications (Sub 6 GHz) is presented in this paper. Four F-shaped antenna elements are placed at four extreme corners and two at the middle side edges of 0.8 mm thick FR4 substrate. An open-ended slot is carved into the ground plane to improve the impedance matching. The proposed antenna operates in the frequency range of 3.4–3.6 GHz (LTE Band 42), with a-10 dB (2:1 voltage standing wave ratio) impedance bandwidth of 200 MHz. The proposed antenna operates in the frequency range of 3.4–3.6 GHz (LTE Band 42), with a-10 dB (2:1 voltage standing wave ratio) impedance bandwidth of 200–MHz. The fabricated MIMO antenna is practically measured and compared with simulated results. The obtained isolation is lower than 20 dB without employing isolation enhancing procedures, making the antenna highly appropriate for 5G smartphone applications. High isolation results in lower values of Envelope Correlation Coefficient (ECC) below 0.01. The antenna’s diversity performance is validated by calculating Total Active Reflection Co-efficient (TARC) which is better than 40 dB. The calculated channel capacity of the six-port antenna array is 32.5 bps/Hz at 20 dB Signal to Noise Ratio (SNR). The six-antenna array’s reliability is evaluated by examining the influence of hand effects and Specific Absorption Rate (SAR). The measured results are consistent with simulated results which exhibit the antenna presented in this article is highly capable of mobile phone applications for future cellular communication.
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