2026 Volume 18 Issue 2 Pages 28-38
Magnetically coupled intra-body communication (IBC) is a promising technology for Body Area Networks (BAN) due to its high robustness against environmental variations and body postures. Based on previous studies establishing high-Q resonance techniques and biosafety, this study proposes a dual-band coil with two resonance points to realize multi-functional and high-efficiency communication systems. The dual-band coil was designed using mathematical modeling to operate at 6.78 MHz and 13.56 MHz. Its performance was evaluated through 3D finite element simulations incorporating transmitter and receiver circuit elements. The results demonstrated that the proposed coil achieved distinct resonance at the intended frequencies as designed. Compared to conventional single-band coils, the dual-band coil significantly reduced signal path loss. Furthermore, the communication characteristics remained stable despite variations in coil angles, proving its high robustness and reliability for practical wearable applications. This research provides a technical foundation for developing advanced, versatile IBC systems for next-generation healthcare and sensing networks.
