This paper presents a comprehensive study on the design and performance evaluation of circular and rectangular microstrip patch antennas tailored for 5G applications, operating at 25 GHz. Utilizing Teflon and Rogers substrates with superior dielectric properties, the antennas are meticulously crafted and rigorously analyzed. The study explores the design methodology, and simulation outcomes, and compares circular and rectangular patch antennas, focusing on their suitability for 5G systems. Through iterative simulations and optimizations, the antennas are fine-tuned to achieve optimal performance parameters, including impedance matching, radiation efficiency, and bandwidth, ensuring their efficacy in high-frequency communication environments. The design methodology involves precise calculations for optimal antenna dimensions, considering substrate material properties, dielectric constants, and desired radiation characteristics. Performance metrics such as peak directivity, gain, efficiency, and bandwidth are comprehensively evaluated and compared for both Teflon and Rogers substrates. This investigation contributes to advancing microstrip patch antenna design for 5G, elucidating the interplay between substrate materials, antenna geometries, and performance characteristics. The findings not only enhance our understanding of antenna design principles but also lay the groundwork for further optimization and refinement of microstrip patch antennas for future high-frequency communication systems.