Comparable Characterization of Capacitive and Galvanic Intrabody Communication Channel

Area of Science:

• Biomedical Engineering
• Signal Processing
• Electromagnetics

Background:

• Intrabody communication (IBC) utilizes the human body for data transmission, crucial for wearable and implantable biomedical devices.
• Existing research often focuses on isolated methods or configurations, limiting comprehensive understanding of IBC channels.

Purpose of the Study:

• To comprehensively study Intrabody Communication (IBC) channels by evaluating galvanic coupling (GC) and capacitive coupling (CC) in wearable and implantable setups.
• To validate and compare results across Finite Element Method (FEM) simulations, equivalent circuit modeling, and experimental characterization.

Main Methods:

• Utilized Finite Element Method (FEM) simulations up to 100 MHz with realistic anatomical models.
• Performed equivalent circuit modeling for IBC channels.
• Conducted experimental channel impulse response (CIR) characterization using pseudorandom noise (PN) sequences and chicken tissue as a biological surrogate up to 2.5 MHz.

Main Results:

• FEM simulations and experimental results showed close agreement, confirming model accuracy.
• The implantable capacitive coupling (CC) configuration demonstrated the highest channel frequency response (CFR) across the tested frequency range.
• Cross-method validation provided comparative insights into different IBC configurations.

Conclusions:

• The study successfully validated multiple methodologies for IBC channel analysis.
• Implantable capacitive coupling presents a highly effective configuration for Intrabody Communication.
• This comprehensive approach enhances the design and optimization of future biomedical communication systems.