Figure 3. 4-element microstrip MIMO antenna system (not slotted)

From

Slot-Based Patch Antenna Design for Enhanced Bandwidth and Reduced Mutual Coupling in MIMO Systems

Nassrin Ibrahim Mohamed Elamin, Mohammed Gronfula

American Journal of Electrical and Electronic Engineering. 2025, 13(1), 10-14 doi:10.12691/ajeee-13-1-2