The rapid integration of wireless technologies into healthcare systems has elevated the importance of antennas, particularly in biomedical applications. Antennas serve as critical enablers for real-time monitoring, diagnosis, and therapy, facilitating seamless communication between medical devices and healthcare networks. However, designing antennas for biomedical use presents unique challenges due to size constraints, body tissue interaction, biocompatibility requirements, and the need for ultra-reliable, low-power performance. This book provides a comprehensive overview of biomedical antenna design, emphasizing key performance metrics such as efficiency, bandwidth, gain, and specific absorption rate (SAR), which are vital for ensuring safe and effective operation in healthcare environments. Enabling technologies such as flexible materials, metamaterials, and miniaturization techniques are discussed, highlighting their role in overcoming conventional design limitations. This first chapter explores recent advancements, including implantable antennas, wearable systems, targeted drug delivery, personalized medicine, and wireless body area networks (WBANs), showcasing their transformative impact on modern healthcare. Features of antenna-based wireless communication systems are examined with a focus on their adaptability, security, and energy efficiency in biomedical contexts. Finally, the chapter includes the organization of the book, where the content of the different chapters, foundational concepts, and design principles to advanced applications are discussed.