In this article, we discuss and analyze the microstrip patch antenna performance with and without the use of metamaterial structure. The return loss of a typical patch antenna designed at the 2.4 GHz resonant frequency was compared with the same patch antenna plus the concept of additional stacked metamaterials, which has attracted significant attention in recent decades. Metamaterials are artificially created materials that have properties not easily found in natural materials. A widely accepted property of metamaterials is their ability to control the propagation of electromagnetic waves. Basically, electromagnetic response refers to how a material affects the electric and magnetic fields to which it is subjected. It turns out that there is an improvement in return loss. This rectangular patch antenna was simulated and tested using the CST simulator, where an electromagnetic analysis tool is used.