Towards a Propagation Model for Wireless Biomedical Applications
Propagation model plays a
very important role in designing wireless communication systems.
Current advances in semiconductor technology has made it possible to
implant a network of bio-sensors inside the human body for health
monitoring purposes. For wireless communication inside the human body,
the tissue medium acts as a channel through which the information is
sent as electromagnetic (EM) radio frequency (RF) waves. A propagation
model is necessary to determine the losses involved in the form of
absorption of EM wave power by the tissue. Absorption of EM waves by
the tissue body, which consists of mostly saline water, accounts for a
major portion of the propagation loss. In this paper we present a
propagation loss model (PMBA) for homogeneous tissue bodies. We have
verified the model for the frequency range of our interest (900MHz to
3GHz) using a 3D EM Simulation Software, HFSSTM, and experimental
measurements using saturated salt water.
See full paper.
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