This article demonstrates the alleviation of mutual coupling of a simple and low-cost four-element microstrip array antenna by loading I-shaped slot-type electromagnetic band gap structure in the ground plane. FR-4 glass epoxy is used as dielectric substrate. Moreover. the proposed array antenna shows a better performance in terms of multi-band resonance. https://www.parisnaturalfoodes.shop/product-category/nail-lacquer-1945/