Description: This book delves into the cutting-edge innovations in antenna technology designed to meet the demands of sixth-generation (6G) communication networks. It explores advanced concepts such as terahertz antennas, intelligent reflecting surfaces, metamaterials, and massive MIMO systems that enable ultra-high-speed, low-latency connectivity. The content highlights energy-efficient designs, miniaturization techniques, and AI-driven optimization for adaptive communication environments. Emphasizing future trends and research challenges, the book provides insights into how next-generation antennas will power 6G-enabled smart cities, IoT, and immersive technologies. It serves as a vital resource for researchers, engineers, and students exploring 6G communication frontiers.