A Strip-Isolated Two-port Millimeter-wave MIMO Antenna for 28 GHz 5G Communication Band

A compact two-port mm-wave MIMO antenna with good isolation is proposed in this research. The antenna has a dimension of 16 × 7 mm
²
and operates in the frequency range of 27 - 29 GHz. The proposed MIMO antenna has two elements which has simulated gains of 4.75 and 5.05 dBi, respectively. The single element is ring-shaped monopole antenna obtained from a circular patch antenna. An isolation of greater than 20 dB is achieved by introducing a vertical parasitic strip between the MIMO elements. A very low Envelope Correlation Coefficient (ECC) of 0.0019 is attained in the operating band. The proposed antenna uses Rogers RT/Duroid 5880 substrate dielectric constant 2.2 and a thickness of 0.254 mm. The small size, high gain, and better isolation features make the proposed MIMO antenna suitable for the next-generation wireless applications.