A macroscopic model of lungs and a material simulating their properties at radio and microwave frequencies

Dielectric mixture theory was applied to develop an analytical expression describing the dielectric constant and conductivity of human lungs. The model consists of air spheres suspended in simulated whole blood in a 30:70 ratio (by volume). Material simulating these properties was tested in the frequency range from 100 MHz to 2 GHz showing a satisfactory agreement with the predicted values.