Advancements in wireless communication demand compact, efficient, and high-performance antennas to support modern technologies and next-generation networks. Conventional microstrip patch antennas, while widely used, suffer from narrow bandwidth and low efficiency, which limit their utility in these applications. To address these challenges, this paper presents the design and analysis of a novel patch antenna integrated with a C-shaped metamaterial structure to enhance its performance characteristics. The proposed metamaterial, characterized by its negative permittivity and permeability, is strategically incorporated into the patch antenna to achieve significant improvements in bandwidth and radiation efficiency. Simulations were conducted using HFSS software to optimize the antenna parameters and evaluate the effects of the C-shaped metamaterial on its electromagnetic properties. The experimental results were taken using VNA and an anechoic chamber. The simulated and experimental outcomes are in close agreement. The results demonstrate that the inclusion of the metamaterial results in a substantial bandwidth enhancement and improved efficiency than conventional patch antennas. Additionally, the metamaterial structure reduces the antenna’s size, making it suitable for compact and efficient wireless communication systems. This research contributes to the growing field of metamaterial-based antenna design, offering a promising approach to overcoming the limitations of traditional antennas.