Abstract
A compact (32 × 32 × 1.6 mm3) quad-element with penta-band key-shaped Multiple-Input-Multiple-Output (MIMO) antenna is proposed having a wide bandwidth for targeting Ku, K and Ka band applications and to be used for 5G millimeter-wave applications. Four antenna designs (Ant-1, Ant-2, Ant-3 and Ant-4) are methodically investigated in terms of simulated gain, return loss, radiation efficiency, radiation pattern, envelope correlation coefficient (ECC), diversity gain (DG) and total active reflection coefficient (TARC). The design parameters of Ant-4 have been optimized for desired performance parameters and operation. Simulated isolation < −17 dB, ECC <0.08, DG between 9.979–9.999 (dB), TARC <0 dB and radiation efficiency > 70% are obtained.
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