Design of modified staircase-enriched rectangular microstrip antenna for mm-wave applications

A two-element rectangular staircase-shaped multiple-input multiple-output (MIMO)antenna has been suggested in this communication for 5G mm-Wave applications. The intendedantenna occupies a volume of 15 × 10 × 1 mm3 is constructed on Rogers RT5880(lossy) dielectricmaterial with relative permittivity of 2.2. The antenna comprises of two staircase shaped radiatorsand a feed is inserted on bottom side of substrate and circle shaped ground on bottom side. Therectangular slots are fused on each radiator to improve the impedance matching at 29 and 39GHz.And, the MIMO antenna radiators are positioned orthogonally each other to enhance the isolationbetween the ports. The planned antenna operates at 29 GHz between 28.98 and 30.79 GHz and39GHz between 37.78 and 40.42Ghz, with isolation (S12) of -21.41 dB and S11 of -10.12 dB.Furthermore, the design provides high peak gain (6.48 and 6.17 dBi), acceptable radiationefficiency (77 and 78%), omni-direction patterns, a considerable mean effective gain (-3dB) andMEG ratio, a low envelope correlation coefficient (<0.01), an adequate diversity gain (10dB).