Cavity‐backed substrate integrated waveguide MIMO element with enhanced isolation for 5G communication

Summary This article communicates a novel compact four‐element orthogonal cavity‐backed antenna for 5G applications with enhanced isolation. The proposed dumbbell‐shaped substrate integrated waveguide–multiple input/multiple output (SIW‐MIMO) resonate at 5.25 GHz (sub‐6 GHz) based on vias and 27 (mm‐wave) copper filling using FR‐4 substrate. Both prototypes are separately designed, fabricated, tested same dimension (40 mm × 40 1.6 mm) as well radiating structure. Moreover, SIW MIMO design performances compared between Rogers RT/Duroid Deployment of technique in minimizes the footprint mutual coupling without involving any decoupling simulation characteristics both operating bands validated measurement results. Furthermore, diversity parameters examined.