Abstract
Numerical modeling plays an important role in the prediction of received signal strength inside the human body, in case of on-body to in-body radio wave propagation in a body area network (BAN). Since the structure of a human body is heterogeneous in nature, the Fresnel scattering coefficients could not be used to incorporate the attenuation properties of the multilayer tissue structure of the human body. This paper proposes the use of ABCD matrix method, which has been used in the analysis of multilayer dielectric slab structure, to determine the attenuation of the electro magnetic (EM) signal due to various in-body structures. In addition, variation of reflection and transmission coefficients of a four-layer body tissue structure with respect to the incident angle is presented and recommends suitable operating frequency in ultra-wide band (UWB) for BAN applications. The authors conducted measurements in body mimicking liquid phantom in UWB and included in support of their research outcome.
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