1. Introduction 1.1 Wireless Body Centric Communication 1.2 The Wireless Body Area Network 1.3 History of Wireless Personal Area and Local Area Networks 1.4 State of the Art Technologies 1.4.1 ISM Band 2.4 GHz 1.4.2 UWB 3-10 GHz 1.4.3 0.3-10 THz 1.5 Applications 1.6 Scope of the Book References 2. On-Body Radio Wave Propagation 2.1 Introduction 2.2 Wearable Antenna Requirements 2.2.1 Design Strategy and Fabrication Methodologies 2.2.2 Simulation Based Approach- Performance Analysis 2.2.3 Anechoic Environment Measurements 2.2.4 Indoor Environment Measurements 2.3 Wearable Antenna Radiation Pattern Variation 2.3.1 Influence of Antenna Location on the Body 2.3.2 Effect of Different Postures and Limb Movements 2.4 Channel Modeling 2.5 Statistical On-Body Measurement Results 2.5.1 UWB 3-10 GHz 2.5.2 mmWave 60 GHz 2.6 Dynamic On-Body Communication Channels &nb