Abstract
This study proposes a quad-element MIMO antenna for ultra-wideband applications. Several design evolutions have been carried out in order to achieve a UWB impedance bandwidth and good positive gain across UWB frequency ranges. In MIMO antenna construction, the best-performing antenna design is used as a basic radiator element. S-parameters, gain, radiation pattern, and diversity performance findings are used to investigate dual and quad-element MIMO antenna designs with various layouts. As a result, the proposed quad-element MIMO antenna operates in the frequency range of 3.5-11.2 GHz with >-20dB isolation in the majority of the operating band. The ECC and DG values are both less than 0.006 and greater than 9.9, respectively, while the MEG and CCL are within acceptable ranges. The simulated findings agree well with the measured results.
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