![]() MIMO (multiple-input–multiple-output) system is one of the prominent solutions as it can enhance the channel capacity. The developing need for a rise in the data rates for wireless communication systems is increasing the demand for a productive and high data rate transmission system that can function in certain frequencies. ![]() All the necessary simulations are carried out in the EM simulator Ansys HFSS v.14.0 and a detailed comparison study is done based on the existing antennas. Acceptable gain, high radiation efficiency, and stable radiation pattern of the proposed design are analysed and the fabricated prototype of two and four element is measured for its performance parameters. The performance parameters are analysed, wherein the envelope correlation coefficient (ECC) has to be less than 0.5, diversity gain nearer to 10 dB in the operating bandwidth, mean effective gain (MEG) less than 3 dB, channel capacity loss (CCL) less than 0.4 bits/s/Hz and the isolation between the antenna elements well above 20 dB. A CPW fed antenna is designed using FR4 substrate, using which two and four element antenna structures are developed. The antennas are placed on a cost-effective compact dielectric substrate with different orientations to minimize the correlation. In this paper, a study on the isolation between the multiple antenna elements is presented. It affects the antenna efficiency and influences the correlation. Mutual coupling between the multiple antenna designs is a critical problem which deteriorates the performance of multiple input multiple output (MIMO) system.
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