Frequency study of ultra wide band signal energy attenuation during propagation in biological tissue

摘要

The aim of this work is to determine the frequency of an UWB (Ultra Wind Band) wave at which the wave can cross the biological tissue with limited losses and deformation. The biological tissue which is characterized by its thickness, its relative dielectric constant and its conductivity, is a sample of fat, localized at a distance of the antenna source which guarantees the inexistence of the attenuation at the amplitude of the electromagnetic fields in the air region. To calculate the attenuation of the wave in the biological tissue, we must simulate their propagation by solving Maxwell's equation in these environments. Several methods have been used such as Finite Element Method (FEM) and the Finite Differences Time Domain (FDTD) method. The source is a simple Gaussian pulse plane and uniform which normally tackles the surface of the samples.