Human Body-Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

Area of Science:

• Biomedical Engineering
• Electrical Engineering
• Human-Computer Interaction

Background:

• On-body sensing and communication systems rely on electrodes for signal transduction.
• Body-electrode interfaces convert ionic currents to electronic currents and vice versa.
• Practical interfaces often introduce impedance and potential barriers, hindering signal transfer.

Purpose of the Study:

• To review the physics of body-electrode interfaces.
• To analyze signal distortion caused by these interfaces.
• To understand the impact of interface-induced signal degradation on applications.

Main Methods:

• Literature review of body-electrode interface physics.
• Analysis of signal distortion mechanisms.
• Examination of performance impacts on biopotential sensing and human body communication.

Main Results:

• Body-electrode interfaces act as transducers with inherent limitations.
• Impedance and potential at the interface impede current flow.
• Signal degradation affects the performance of on-body applications.

Conclusions:

• A thorough understanding of body-electrode interface physics is essential.
• Minimizing interface-induced signal distortion is key for reliable on-body applications.
• This review provides insights for improving biopotential sensing and human body communication systems.