  This study focuses attention on interstitial microwave hyperthermia, which is
a popular medical procedure for treatment of pathological human tissues
containing tumors. In the paper, the 2D finite element analysis is used to
compare the models of the coaxial antenna with one, two and three air slots.
The implemented models are based on the wave equation in the TM mode coupled
with the Pennes equation under a transient state condition. Moreover, the model
takes into account the thermo-electrical properties of human tissue for the
antenna operating frequency of 2.45 GHz. Simulation results for different
tissues and various multi-slot antenna configurations have been presented. The
comparative analysis for single-, double-and triple-slot coaxial antennas shown
in this article does not have equivalents in the current literature in the
field of hyperthermia.
