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Distributed Circuit Modeling of Galvanic and Capacitive Coupling for Intrabody Communication

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4 Author(s)
Amparo Callejon, M. ; Biomed. Eng. Group, Univ. of Seville, Seville, Spain ; Naranjo-Hernandez, D. ; Reina-Tosina, J. ; Roa, L.M.

Modeling of intrabody communication (IBC) entails the understanding of the interaction between electromagnetic fields and living tissues. At the same time, an accurate model can provide practical hints toward the deployment of an efficient and secure communication channel for body sensor networks. In the literature, two main IBC coupling techniques have been proposed: galvanic and capacitive coupling. Nevertheless, models that are able to emulate both coupling approaches have not been reported so far. In this paper, a simple model based on a distributed parameter structure with the flexibility to adapt to both galvanic and capacitive coupling has been proposed. In addition, experimental results for both coupling methods were acquired by means of two harmonized measurement setups. The model simulations have been subsequently compared with the experimental data, not only to show their validity but also to revise the practical frequency operation range for both techniques. Finally, the model, along with the experimental results, has also allowed us to provide some practical rules to optimally tackle IBC design.

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Biomedical Engineering, IEEE Transactions on  (Volume:59 ,  Issue: 11 )