This paper presents the design and analysis of a meta surface-based antenna system specially created for Wireless Body Area Network (WBAN) applications operating in the terahertz (THz) frequency range. The antenna is designed to meet the growing needs of high-speed, low-power communication in wearable biomedical devices. By integrating a meta surface, the antenna can precisely control electromagnetic waves, improving performance factors such as gain, bandwidth, and efficiency. Using terahertz frequencies allows for better data rates and smaller device sizes. This work introduces an innovative and practical solution for future body-worn technologies. \\n\\n