Fifth Generation MIMO Antenna Array With Diversity and Mutual Coupling Reduction Technique

Abstract

In this paper, a compact multiple input multiple output (MIMO) antenna array is designed with the defected ground structure (DGS) using spatial diversity techniques on Rogers RT/duroid 5880 substrate having the dimension of 11 x 30 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> with the thickness of 0.79 mm. The MIMO antenna array with DGS has improved the gain and isolation of the antenna. The gain of the proposed MIMO antenna array is 9.84 dBi with 96.59% radiating efficiency at 28 GHz resonant frequency. The -10 dB impedance bandwidth lies from 26.38-29.68 GHz. In this paper, the MIMO performance metrics are calculated such as isolation, envelope correlation coefficient, diversity gain, and channel capacity loss. The ECC and diversity gain values are 1.29 x 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-7</sup> and 9.99 dB, respectively, at 28 GHz. The channel capacity loss for MIMO antenna is below 0.4 bps/Hz in the operating band and the isolation (|S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</inf> | = 41.25 dB) at 28 GHz and |S <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21</inf> | > 28 dB in the complete operating band. All the calculated parameters are satisfied as per the standard of the ITU. The proposed MIMO antenna is a good candidate for a 5G wireless communication system.