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Electrode Shapes and Frequency Band Analysis for Human Body Communication

Geometric shapes of electrodes for channel optimization of Human Body Communication (HBC) are presented. Effective energy coupling between signal electrodes and the human body is described in deep. The influence of transmitting distance of HBC channel, ground leakage, human body composition, surrounding environment, geometric shapes and contact of the electrodes with the body on capacitive coupling is discussed. Selected geometric shapes of electrodes are developed, measured and compared for its effectiveness. The key finding of the research is that the best shape for capacitive coupling (CC-HBC) electrode is the octagon, and dynamic carrier frequency change.