Abstract
In this article, the analysis of isolation improvement in cylindrical dielectric resonator antennas (CDRAs) is performed for wideband multiple-input multiple-output (MIMO) applications. The proposed MIMO design consists of a K-shaped microstrip feed network above which the dielectric resonators are placed and an extended semi-circular microstrip at the backside of the antenna attached with the partial ground plane. The exclusive feature of the proposed MIMO antenna includes high isolation in a wide frequency range with significantly less separation between the radiators with good gain. Measured results show that this design offers a below 10 dB impedance bandwidth 138.02% (1.54–8.4 GHz) with greater than 15 dB isolation. The measurement of radiation patterns and envelope correlation coefficient (ECC) is also performed to verify the antenna suitability for MIMO)/diversity systems. Ansys HFSS 14.0 version has been used for analysis to get optimized value for the proposed antenna design.
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