Effect of tissue boundaries on the intra-body communication channel at 2.38 GHz

A study of the intra-body propagation channel between two identical tissue implanted antennas is presented. To investigate the effect of the tissue boundaries, the channel between the two implants is evaluated within a tissue layered numerical phantom with both insulated and un-insulated antenna structures in the MedRadio operating band (2.36-2.40 GHz). The results demonstrate how wave propagation between the antennas inside the same block of tissue is largely unaffected by changes in the peripheral surrounding tissues, irrespective of their material characteristics. On the contrary, propagation across tissue boundaries is affected by the boundary and the path distance within each tissue according to the dielectric parameters involved.