Wireless Communication Technologies: 5G, IoT, and Beyond explores the foundational principles and real-world applications of wireless systems. Beginning with an overview of traditional communication models, the book then delves into the capabilities and infrastructure of 5G networks, highlighting innovations such as ultra-reliable low-latency communication and network slicing. It also covers the expanding world of the Internet of Things (IoT), where interconnected devices are revolutionising sectors from healthcare to agriculture. Looking ahead, the book examines emerging technologies like 6G, terahertz communications, artificial intelligence in network optimisation, and next-generation satellite systems. Each chapter combines theory with practical insights, supported by illustrations and case studies that contextualise advancements in real-world scenarios. By presenting both the current state and future trends of wireless communications, this book aims to serve as a comprehensive guide for anyone seeking to navigate and contribute to this fast-moving field.