Beamforming MIMO Array Antenna for 5G-Millimeter-Wave Application

The high gain, high speed/data rate, high capacity, and beamforming antennas are required for the present generation of mobile and wireless applications to satisfy the exponentially growing demands of the users. This paper presents low mutual coupling multiple input-multiple output (MIMO) array antenna for millimetre-wave (mmw) application. The MIMO-array beamforming antenna with 2:1 VSWR band is proposed for 28.0 GHz and covers 27.04-28.35 GHz frequency band, which is suitable for mm-wave n261 5G-band which cover the frequency range from 27.5-28.35 GHz. It consists of 2 x 12 antenna array elements and the prototype is designed on low loss Rogers Duroid 5880 substrate of size 51.45 x 36.87mm(2). The beamforming MIMO antenna covers +/- 20(0) main lobe directions. The mutual coupling at the MIMO-array ports is less than 28.0 dB. The radiation efficiency and the gain in the presented band are more than 93.0% and more than 13.99 dBi. The ECC in the presented frequency band is <= 10(-4), which is one of the advantages of the proposed design. The design covers indoor and outdoor Gaussian applications, and has 1.31 GHz TARC active bandwidth. It has 4.65% simulated and 4.73% measured fractional bandwidths.