Dielectric Spectroscopy with the Microwave Ablation Antennas operating at 2.45 and 5.8 GHz

Microwave thermal ablation is a therapeutic technique used to treat tumor in different types of tissue. The technique utilizes a specially designed antenna which increases the tissue temperature causing cellular necrosis. The treatment can be advanced further by utilizing the antenna's potential to perform dielectric spectroscopy of the tissue in-situ. This information can be elaborated to determine the antenna's position in the tissue, monitor the ablation zone evolution and provide additional characterization of malignancies for future scientific studies. This work studied the ability of asymmetric dipole antennas for microwave ablation to perform broadband dielectric spectroscopy. The frequency limitations for measurements were established in respect to the antenna-surrounding material matching and the transversal dimensions of the material in which the antenna is immersed.